{"id":131739,"date":"2020-07-06T15:11:03","date_gmt":"2020-07-06T07:11:03","guid":{"rendered":"http:\/\/4563.org\/?p=131739"},"modified":"2020-07-06T15:11:03","modified_gmt":"2020-07-06T07:11:03","slug":"scala%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%ef%bc%88%e4%ba%8c%ef%bc%89%e3%80%81%e5%9f%ba%e6%9c%ac%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=131739","title":{"rendered":"scala\u8bed\u8a00\u5b66\u4e60\uff08\u4e8c\uff09\u3001\u57fa\u672c\u4f7f\u7528"},"content":{"rendered":"<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u53d8\u91cf\u58f0\u660e\" title=\"\u53d8\u91cf\u58f0\u660e\"><\/a>\u53d8\u91cf\u58f0\u660e<\/h2>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u6cd5\u683c\u5f0f\" title=\"\u8bed\u6cd5\u683c\u5f0f\"><\/a>\u8bed\u6cd5\u683c\u5f0f<\/h3>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>val&#x2F;var \u53d8\u91cf\u540d\u79f0:\u53d8\u91cf\u7c7b\u578b &#x3D; \u521d\u59cb\u503c<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<ul>\n<li><code>val<\/code>\u5b9a\u4e49\u7684\u662f<strong>\u4e0d\u53ef\u91cd\u65b0\u8d4b\u503c<\/strong>\u7684\u53d8\u91cf(\u503c\u4e0d\u53ef\u4fee\u6539)<\/li>\n<li><code>var<\/code>\u5b9a\u4e49\u7684\u662f<strong>\u53ef\u91cd\u65b0\u8d4b\u503c<\/strong>\u7684\u53d8\u91cf(\u503c\u53ef\u4ee5\u4fee\u6539)<\/li>\n<li>scala\u4e2d\u58f0\u660e\u53d8\u91cf\u662f\u53d8\u91cf\u540d\u79f0\u5728\u524d\uff0c\u53d8\u91cf\u7c7b\u578b\u5728\u540e\uff0c\u8ddfjava\u662f\u6b63\u597d\u76f8\u53cd<\/li>\n<li>scala\u7684\u8bed\u53e5\u6700\u540e\u4e0d\u9700\u8981\u6dfb\u52a0\u5206\u53f7<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u6f14\u793a\" title=\"\u6f14\u793a\"><\/a>\u6f14\u793a<\/h3>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>#\u4f7f\u7528val\u58f0\u660e\u53d8\u91cf,\u76f8\u5f53\u4e8ejava\u4e2d\u7684final\u4fee\u9970,\u4e0d\u80fd\u5728\u6307\u5411\u5176\u4ed6\u7684\u6570\u636e\u4e86<\/span><br><span>val  a:Int &#x3D; 10<\/span><br><span>#\u4f7f\u7528var\u58f0\u660e\u53d8\u91cf,\u540e\u671f\u53ef\u4ee5\u88ab\u4fee\u6539\u91cd\u65b0\u8d4b\u503c<\/span><br><span>var  b:Int &#x3D; 20\t <\/span><br><span>b&#x3D;100<\/span><br><span>#scala\u4e2d\u7684\u53d8\u91cf\u7684\u7c7b\u578b\u53ef\u4ee5\u663e\u5f0f\u7684\u58f0\u660e,\u4e5f\u53ef\u4ee5\u4e0d\u58f0\u660e,\u5982\u679c\u4e0d\u663e\u5f0f\u7684\u58f0\u660e\u8fd9\u4f1a\u6839\u636e\u53d8\u91cf\u7684\u503c\u6765\u63a8\u65ad\u51fa\u6765\u53d8\u91cf\u7684\u7c7b\u578b(scala\u652f\u6301\u7c7b\u578b\u63a8\u65ad)<\/span><br><span>val c &#x3D; 20<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u60f0\u6027\u53d8\u91cf\" title=\"\u60f0\u6027\u53d8\u91cf\"><\/a>\u60f0\u6027\u53d8\u91cf<\/h3>\n<ul>\n<li>Scala\u4e2d\u4f7f\u7528\u5173\u952e\u5b57lazy\u6765\u5b9a\u4e49\u60f0\u6027\u53d8\u91cf\uff0c\u5b9e\u73b0\u5ef6\u8fdf\u52a0\u8f7d(\u61d2\u52a0\u8f7d)\u3002 <\/li>\n<li>\u60f0\u6027\u53d8\u91cf\u53ea\u80fd\u662f\u4e0d\u53ef\u53d8\u53d8\u91cf\uff0c\u5e76\u4e14\u53ea\u6709\u5728\u8c03\u7528\u60f0\u6027\u53d8\u91cf\u65f6\uff0c\u624d\u4f1a\u53bb\u5b9e\u4f8b\u5316\u8fd9\u4e2a\u53d8\u91cf\u3002<\/li>\n<li>\u8bed\u6cd5\u683c\u5f0f<\/li>\n<\/ul>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>lazy val \u53d8\u91cf\u540d &#x3D; \u8868\u8fbe\u5f0f<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u6570\u636e\u7c7b\u578b\" title=\"\u6570\u636e\u7c7b\u578b\"><\/a>\u6570\u636e\u7c7b\u578b<\/h2>\n<p>Scala \u4e0e Java\u6709\u7740\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e0b\u8868\u5217\u51fa\u4e86 Scala \u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u6570\u636e\u7c7b\u578b<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Byte<\/td>\n<td>8\u4f4d\u6709\u7b26\u53f7\u8865\u7801\u6574\u6570\u3002\u6570\u503c\u533a\u95f4\u4e3a -128 \u5230 127<\/td>\n<\/tr>\n<tr>\n<td>Short<\/td>\n<td>16\u4f4d\u6709\u7b26\u53f7\u8865\u7801\u6574\u6570\u3002\u6570\u503c\u533a\u95f4\u4e3a -32768 \u5230 32767<\/td>\n<\/tr>\n<tr>\n<td>Int<\/td>\n<td>32\u4f4d\u6709\u7b26\u53f7\u8865\u7801\u6574\u6570\u3002\u6570\u503c\u533a\u95f4\u4e3a -2147483648 \u5230 2147483647<\/td>\n<\/tr>\n<tr>\n<td>Long<\/td>\n<td>64\u4f4d\u6709\u7b26\u53f7\u8865\u7801\u6574\u6570\u3002\u6570\u503c\u533a\u95f4\u4e3a -9223372036854775808 \u5230 9223372036854775807<\/td>\n<\/tr>\n<tr>\n<td>Float<\/td>\n<td>32\u4f4dIEEE754\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570<\/td>\n<\/tr>\n<tr>\n<td>Double<\/td>\n<td>64\u4f4dIEEE754\u5355\u7cbe\u5ea6\u6d6e\u70b9\u6570<\/td>\n<\/tr>\n<tr>\n<td>Char<\/td>\n<td>6\u4f4d\u65e0\u7b26\u53f7Unicode\u5b57\u7b26, \u533a\u95f4\u503c\u4e3a U+0000 \u5230 U+FFFF<\/td>\n<\/tr>\n<tr>\n<td>String<\/td>\n<td>\u5b57\u7b26\u5e8f\u5217<\/td>\n<\/tr>\n<tr>\n<td>Boolean<\/td>\n<td>true\u6216false<\/td>\n<\/tr>\n<tr>\n<td>Unit<\/td>\n<td>\u8868\u793a\u65e0\u503c\uff0c\u548c\u5176\u4ed6\u8bed\u8a00\u4e2dvoid\u7b49\u540c\u3002\u7528\u4f5c\u4e0d\u8fd4\u56de\u4efb\u4f55\u7ed3\u679c\u7684\u65b9\u6cd5\u7684\u7ed3\u679c\u7c7b\u578b\u3002Unit\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u503c\uff0c\u5199\u6210()\u3002<\/td>\n<\/tr>\n<tr>\n<td>Null<\/td>\n<td>null \u6216\u7a7a\u5f15\u7528<\/td>\n<\/tr>\n<tr>\n<td>Nothing<\/td>\n<td>Nothing\u7c7b\u578b\u5728Scala\u7684\u7c7b\u5c42\u7ea7\u7684\u6700\u4f4e\u7aef\uff1b\u5b83\u662f\u4efb\u4f55\u5176\u4ed6\u7c7b\u578b\u7684\u5b50\u7c7b\u578b\u3002<\/td>\n<\/tr>\n<tr>\n<td>Any<\/td>\n<td>Any\u662f\u6240\u6709\u5176\u4ed6\u7c7b\u7684\u8d85\u7c7b<\/td>\n<\/tr>\n<tr>\n<td>AnyRef<\/td>\n<td>AnyRef\u7c7b\u662fScala\u91cc\u6240\u6709\u5f15\u7528\u7c7b(reference class)\u7684\u57fa\u7c7b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#scala\u7c7b\u578b\u4e0eJava\u7684\u533a\u522b\" title=\"scala\u7c7b\u578b\u4e0eJava\u7684\u533a\u522b\"><\/a>scala\u7c7b\u578b\u4e0eJava\u7684\u533a\u522b<\/h3>\n<ol>\n<li>scala\u4e2d\u6240\u6709\u7684\u7c7b\u578b\u90fd\u4f7f\u7528\u5927\u5199\u5b57\u6bcd\u5f00\u5934<\/li>\n<li>\u6574\u5f62\u4f7f\u7528Int\u800c\u4e0d\u662fInteger<\/li>\n<li>scala\u4e2d\u5b9a\u4e49\u53d8\u91cf\u53ef\u4ee5\u4e0d\u5199\u7c7b\u578b\uff0c\u8ba9scala\u7f16\u8bd1\u5668\u81ea\u52a8\u63a8\u65ad<\/li>\n<\/ol>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#scala\u7c7b\u578b\u5c42\u6b21\u7ed3\u6784\" title=\"scala\u7c7b\u578b\u5c42\u6b21\u7ed3\u6784\"><\/a>scala\u7c7b\u578b\u5c42\u6b21\u7ed3\u6784<\/h3>\n<p><img decoding=\"async\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2020\/07\/20200706_5f034dc4b1d0c.png\" alt=\"scala\u8bed\u8a00\u5b66\u4e60\uff08\u4e8c\uff09\u3001\u57fa\u672c\u4f7f\u7528\"><\/p>\n<table>\n<thead>\n<tr>\n<th>\u7c7b\u578b<\/th>\n<th>\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Any<\/td>\n<td><strong>\u6240\u6709\u7c7b\u578b<\/strong>\u7684\u7236\u7c7b\uff0c,\u5b83\u6709\u4e24\u4e2a\u5b50\u7c7bAnyRef\u4e0eAnyVal<\/td>\n<\/tr>\n<tr>\n<td>AnyVal<\/td>\n<td><strong>\u6240\u6709\u6570\u503c\u7c7b\u578b<\/strong>\u7684\u7236\u7c7b<\/td>\n<\/tr>\n<tr>\n<td>AnyRef<\/td>\n<td>\u6240\u6709\u5bf9\u8c61\u7c7b\u578b\uff08\u5f15\u7528\u7c7b\u578b\uff09\u7684\u7236\u7c7b<\/td>\n<\/tr>\n<tr>\n<td>Unit<\/td>\n<td>\u8868\u793a\u7a7a\uff0cUnit\u662fAnyVal\u7684\u5b50\u7c7b\uff0c\u5b83\u53ea\u6709\u4e00\u4e2a\u7684\u5b9e\u4f8b\uff08\uff09\uff0c\u5b83\u7c7b\u4f3c\u4e8eJava\u4e2d\u7684void\uff0c\u4f46scala\u8981\u6bd4Java\u66f4\u52a0\u9762\u5411\u5bf9\u8c61<\/td>\n<\/tr>\n<tr>\n<td>Null<\/td>\n<td>Null\u662fAnyRef\u7684\u5b50\u7c7b\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u662f\u6240\u6709\u5f15\u7528\u7c7b\u578b\u7684\u5b50\u7c7b\u3002\u5b83\u7684\u5b9e\u4f8b\u662fnull,   \u53ef\u4ee5\u5c06null\u8d4b\u503c\u7ed9\u4efb\u4f55\u5bf9\u8c61\u7c7b\u578b<\/td>\n<\/tr>\n<tr>\n<td>Nothing<\/td>\n<td>\u6240\u6709\u7c7b\u578b\u7684<strong>\u5b50\u7c7b<\/strong>\u4e0d\u80fd\u76f4\u63a5\u521b\u5efa\u8be5\u7c7b\u578b\u5b9e\u4f8b\uff0c\u67d0\u4e2a\u65b9\u6cd5\u629b\u51fa\u5f02\u5e38\u65f6\uff0c\u8fd4\u56de\u7684\u5c31\u662fNothing\u7c7b\u578b\uff0c\u56e0\u4e3aNothing\u662f\u6240\u6709\u7c7b\u7684\u5b50\u7c7b\uff0c\u90a3\u4e48\u5b83\u53ef\u4ee5\u8d4b\u503c\u4e3a\u4efb\u4f55\u7c7b\u578b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u6761\u4ef6\u8868\u8fbe\u5f0f\" title=\"\u6761\u4ef6\u8868\u8fbe\u5f0f\"><\/a>\u6761\u4ef6\u8868\u8fbe\u5f0f<\/h2>\n<p>\u6761\u4ef6\u8868\u8fbe\u5f0f\u5c31\u662fif\u8868\u8fbe\u5f0f\uff0cif\u8868\u8fbe\u5f0f\u53ef\u4ee5\u6839\u636e\u7ed9\u5b9a\u7684\u6761\u4ef6\u662f\u5426\u6ee1\u8db3\uff0c\u6839\u636e\u6761\u4ef6\u7684\u7ed3\u679c\uff08\u771f\u6216\u5047\uff09\u51b3\u5b9a\u6267\u884c\u5bf9\u5e94\u7684\u64cd\u4f5c\u3002scala\u6761\u4ef6\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u548cJava\u4e00\u6837\u3002<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>14<\/span><br><span>15<\/span><br><span>16<\/span><br><span>17<\/span><br><span>18<\/span><br><span>19<\/span><br><span>20<\/span><br><span>21<\/span><br><span>22<\/span><br><span>23<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>&#x2F;&#x2F;\u5b9a\u4e49\u53d8\u91cfx<\/span><br><span>scala&gt; val x &#x3D;1<\/span><br><span>x: Int &#x3D; 1<\/span><br><span><\/span><br><span>&#x2F;&#x2F;if\u8868\u8fbe\u5f0f<\/span><br><span>scala&gt; val y &#x3D;if(x&gt;0) 1 else -1<\/span><br><span>y: Int &#x3D; 1<\/span><br><span><\/span><br><span>&#x2F;&#x2F;\u652f\u6301\u6df7\u5408\u7c7b\u578b\u8868\u8fbe\u5f0f<\/span><br><span>scala&gt; val z&#x3D;if(x&gt;1) 1 else &quot;error&quot;<\/span><br><span>z: Any &#x3D; error<\/span><br><span><\/span><br><span>&#x2F;&#x2F;\u7f3a\u5931else \u76f8\u5f53\u4e8e if(x&gt;2) 1 else ()<\/span><br><span>scala&gt; val m&#x3D;if(x&gt;2) 1<\/span><br><span>m: AnyVal &#x3D; ()<\/span><br><span><\/span><br><span>&#x2F;&#x2F;scala\u4e2d\u6709\u4e2aUnit\u7c7b\uff0c\u7528\u4f5c\u4e0d\u8fd4\u56de\u4efb\u4f55\u7ed3\u679c\u7684\u65b9\u6cd5\u7684\u7ed3\u679c\u7c7b\u578b,\u76f8\u5f53\u4e8eJava\u4e2d\u7684void\uff0cUnit\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u503c\uff0c\u5199\u6210()<\/span><br><span>scala&gt; val n&#x3D;if(x&gt;2) 1 else ()<\/span><br><span>n: AnyVal &#x3D; ()<\/span><br><span><\/span><br><span>&#x2F;&#x2F;if(xx) else if(xx) else <\/span><br><span>scala&gt; val k&#x3D;if(x&lt;0) -1 else if (x&#x3D;&#x3D;0) 0 else 1<\/span><br><span>k: Int &#x3D; 1<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u5757\u8868\u8fbe\u5f0f\" title=\"\u5757\u8868\u8fbe\u5f0f\"><\/a>\u5757\u8868\u8fbe\u5f0f<\/h2>\n<p>\u5b9a\u4e49\u53d8\u91cf\u65f6\u7528 {} \u5305\u542b\u4e00\u7cfb\u5217\u8868\u8fbe\u5f0f\uff0c\u5176\u4e2d\u5757\u7684\u6700\u540e\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u5c31\u662f\u5757\u7684\u503c\u3002<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>val x&#x3D;0 <\/span><br><span>val result&#x3D;&#123;<\/span><br><span>  val y&#x3D;x+10<\/span><br><span>  val z&#x3D;y+&quot;-hello&quot;  <\/span><br><span>  val m&#x3D;z+&quot;-kaikeba&quot;<\/span><br><span>    &quot;over&quot;<\/span><br><span>&#125;<\/span><br><span>&#x2F;&#x2F;result\u7684\u503c\u5c31\u662f\u5757\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c    <\/span><br><span>&#x2F;&#x2F;\u540e\u671f\u4e00\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4e0d\u9700\u8981\u52a0\u4e0areturn,\u628a\u8981\u8fd4\u56de\u7684\u7ed3\u679c\u653e\u5728\u65b9\u6cd5\u7684\u6700\u540e\u4e00\u884c\u5c31\u53ef\u4ee5\u4e86<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u5faa\u73af\" title=\"\u5faa\u73af\"><\/a>\u5faa\u73af<\/h2>\n<p>\u5728scala\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528for\u548cwhile\uff0c\u4f46\u4e00\u822c\u63a8\u8350\u4f7f\u7528for\u8868\u8fbe\u5f0f\uff0c\u56e0\u4e3afor\u8868\u8fbe\u5f0f\u8bed\u6cd5\u66f4\u7b80\u6d01<\/p>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#for\u5faa\u73af\" title=\"for\u5faa\u73af\"><\/a>for\u5faa\u73af<\/h3>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u6cd5\u7ed3\u6784\" title=\"\u8bed\u6cd5\u7ed3\u6784\"><\/a>\u8bed\u6cd5\u7ed3\u6784<\/h4>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>for (i &lt;- \u8868\u8fbe\u5f0f&#x2F;\u6570\u7ec4&#x2F;\u96c6\u5408)&#123;<\/span><br><span>  &#x2F;&#x2F;\u8868\u8fbe\u5f0f<\/span><br><span>&#125;<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u6f14\u793a-1\" title=\"\u6f14\u793a\"><\/a>\u6f14\u793a<\/h4>\n<p>\u7b80\u5355\u7684for\u5faa\u73af<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>14<\/span><br><span>15<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>&#x2F;&#x2F;\u7b80\u5355\u7684for\u5faa\u73af<\/span><br><span>scala&gt; val nums&#x3D; 1 to 10<\/span><br><span>nums: scala.collection.immutable.Range.Inclusive &#x3D; Range(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)<\/span><br><span><\/span><br><span>scala&gt; for(i &lt;- nums) println(i)<\/span><br><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u53cc\u91cdfor\u5faa\u73af\" title=\"\u53cc\u91cdfor\u5faa\u73af\"><\/a>\u53cc\u91cdfor\u5faa\u73af<\/h4>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>14<\/span><br><span>15<\/span><br><span>16<\/span><br><span>17<\/span><br><span>18<\/span><br><span>19<\/span><br><span>20<\/span><br><span>21<\/span><br><span>22<\/span><br><span>23<\/span><br><span>24<\/span><br><span>25<\/span><br><span>26<\/span><br><span>27<\/span><br><span>28<\/span><br><span>29<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>&#x2F;&#x2F;\u53cc\u91cdfor\u5faa\u73af<\/span><br><span>scala&gt;  for(i &lt;- 1 to 3; j &lt;- 1 to 3) println(i*10+j)<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>21<\/span><br><span>22<\/span><br><span>23<\/span><br><span>31<\/span><br><span>32<\/span><br><span>33<\/span><br><span><\/span><br><span>&#x2F;&#x2F;\u53cc\u91cdfor\u5faa\u73af\u6253\u537099\u4e58\u6cd5\u8868<\/span><br><span>for(i &lt;- 1 to 9; j &lt;- 1 to i)&#123;<\/span><br><span>  print(i+&quot;*&quot;+j+&quot;&#x3D;&quot;+i*j+&quot;t&quot;)<\/span><br><span>   if(i&#x3D;&#x3D;j)&#123;<\/span><br><span>     println()<\/span><br><span>  &#125;    <\/span><br><span>&#125; <\/span><br><span><\/span><br><span>1*1&#x3D;1<\/span><br><span>2*1&#x3D;2   2*2&#x3D;4<\/span><br><span>3*1&#x3D;3   3*2&#x3D;6   3*3&#x3D;9<\/span><br><span>4*1&#x3D;4   4*2&#x3D;8   4*3&#x3D;12  4*4&#x3D;16<\/span><br><span>5*1&#x3D;5   5*2&#x3D;10  5*3&#x3D;15  5*4&#x3D;20  5*5&#x3D;25<\/span><br><span>6*1&#x3D;6   6*2&#x3D;12  6*3&#x3D;18  6*4&#x3D;24  6*5&#x3D;30  6*6&#x3D;36<\/span><br><span>7*1&#x3D;7   7*2&#x3D;14  7*3&#x3D;21  7*4&#x3D;28  7*5&#x3D;35  7*6&#x3D;42  7*7&#x3D;49<\/span><br><span>8*1&#x3D;8   8*2&#x3D;16  8*3&#x3D;24  8*4&#x3D;32  8*5&#x3D;40  8*6&#x3D;48  8*7&#x3D;56  8*8&#x3D;64<\/span><br><span>9*1&#x3D;9   9*2&#x3D;18  9*3&#x3D;27  9*4&#x3D;36  9*5&#x3D;45  9*6&#x3D;54  9*7&#x3D;63  9*8&#x3D;72  9*9&#x3D;81<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u5b88\u536b\" title=\"\u5b88\u536b\"><\/a>\u5b88\u536b<\/h4>\n<p>\u5728for\u8868\u8fbe\u5f0f\u4e2d\u53ef\u4ee5\u6dfb\u52a0if\u5224\u65ad\u8bed\u53e5\uff0c\u8fd9\u4e2aif\u5224\u65ad\u5c31\u79f0\u4e3a\u5b88\u536b<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span><span>\/\/\u8bed\u6cd5\u7ed3\u6784<\/span><\/span><br><span><span>for<\/span>(i &lt;- \u8868\u8fbe\u5f0f\/\u6570\u7ec4\/\u96c6\u5408 <span>if<\/span> \u8868\u8fbe\u5f0f) &#123;<\/span><br><span>  <span>\/\/ \u8868\u8fbe\u5f0f<\/span><\/span><br><span>&#125;<\/span><br><span><\/span><br><span>scala&gt; <span>for<\/span>(i &lt;- <span>1<\/span> to <span>10<\/span> <span>if<\/span> i &gt;<span>5<\/span>) println(i)<\/span><br><span><span>6<\/span><\/span><br><span><span>7<\/span><\/span><br><span><span>8<\/span><\/span><br><span><span>9<\/span><\/span><br><span><span>10<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#for\u63a8\u5bfc\u5f0f\" title=\"for\u63a8\u5bfc\u5f0f\"><\/a>for\u63a8\u5bfc\u5f0f<\/h4>\n<p>\u5728for\u5faa\u73af\u4f53\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528yield\u8868\u8fbe\u5f0f\u6784\u5efa\u51fa\u4e00\u4e2a\u96c6\u5408\uff0c\u6211\u4eec\u628a\u4f7f\u7528yield\u7684for\u8868\u8fbe\u5f0f\u79f0\u4e4b\u4e3a\u63a8\u5bfc\u5f0f<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span># <span>for<\/span>\u63a8\u5bfc\u5f0f\uff1a<span>for<\/span>\u8868\u8fbe\u5f0f\u4e2d\u4ee5<span>yield<\/span>\u5f00\u59cb\uff0c\u8be5<span>for<\/span>\u8868\u8fbe\u5f0f\u4f1a\u6784\u5efa\u51fa\u4e00\u4e2a\u96c6\u5408<\/span><br><span><\/span><br><span><span>val<\/span> v = <span>for<\/span>(i &lt;- <span>1<\/span> to <span>5<\/span>) <span>yield<\/span> i * <span>10<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#while\u5faa\u73af\" title=\"while\u5faa\u73af\"><\/a>while\u5faa\u73af<\/h3>\n<p>scala\u4e2dwhile\u5faa\u73af\u548cJava\u4e2d\u662f\u4e00\u81f4\u7684<\/p>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u6cd5\u7ed3\u6784-1\" title=\"\u8bed\u6cd5\u7ed3\u6784\"><\/a>\u8bed\u6cd5\u7ed3\u6784<\/h4>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>14<\/span><br><span>15<\/span><br><span>16<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span><span>while<\/span>(\u8fd4\u56de\u503c\u4e3a\u5e03\u5c14\u7c7b\u578b\u7684\u8868\u8fbe\u5f0f)&#123;<\/span><br><span>    <span>\/\/\u8868\u8fbe\u5f0f<\/span><\/span><br><span>&#125;<\/span><br><span><\/span><br><span>scala&gt; <span>var<\/span> x = <span>10<\/span><\/span><br><span>x: <span>Int<\/span> = <span>10<\/span><\/span><br><span><\/span><br><span>scala&gt; <span>while<\/span>(x &gt;<span>5<\/span>)&#123;<\/span><br><span>     | println(x)<\/span><br><span>     | x -= <span>1<\/span><\/span><br><span>     | &#125;<\/span><br><span><span>10<\/span><\/span><br><span><span>9<\/span><\/span><br><span><span>8<\/span><\/span><br><span><span>7<\/span><\/span><br><span><span>6<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u65b9\u6cd5\" title=\"\u65b9\u6cd5\"><\/a>\u65b9\u6cd5<\/h2>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u6cd5\" title=\"\u8bed\u6cd5\"><\/a>\u8bed\u6cd5<\/h3>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span><span><span>def<\/span> <span>methodName<\/span> <\/span>(\u53c2\u6570\u540d:\u53c2\u6570\u7c7b\u578b, \u53c2\u6570\u540d:\u53c2\u6570\u7c7b\u578b) : [<span>return<\/span> <span><span>type<\/span>] <\/span>= &#123;<\/span><br><span>    <span>\/\/ \u65b9\u6cd5\u4f53\uff1a\u4e00\u7cfb\u5217\u7684\u4ee3\u7801<\/span><\/span><br><span>&#125;<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<p>\u8bf4\u660e:<\/p>\n<ul>\n<li>\u53c2\u6570\u5217\u8868\u7684\u53c2\u6570\u7c7b\u578b\u4e0d\u80fd\u7701\u7565<\/li>\n<li>\u8fd4\u56de\u503c\u7c7b\u578b\u53ef\u4ee5\u7701\u7565\uff0c\u7531scala\u7f16\u8bd1\u5668\u81ea\u52a8\u63a8\u65ad<\/li>\n<li>\u8fd4\u56de\u503c\u53ef\u4ee5\u4e0d\u5199return\uff0c\u9ed8\u8ba4\u5c31\u662f{}\u5757\u8868\u8fbe\u5f0f\u7684\u503c<\/li>\n<\/ul>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>scala&gt; <span><span>def<\/span> <span>add<\/span><\/span>(a:<span>Int<\/span>,b:<span>Int<\/span>) = a+b<\/span><br><span>add: (a: <span>Int<\/span>, b: <span>Int<\/span>)<span>Int<\/span><\/span><br><span><\/span><br><span>scala&gt; add(<span>1<\/span>,<span>2<\/span>)<\/span><br><span>res8: <span>Int<\/span> = <span>3<\/span><\/span><br><span><\/span><br><span>scala&gt;<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<p>\u6ce8\u610f:<\/p>\n<ul>\n<li>\u5982\u679c\u5b9a\u4e49\u9012\u5f52\u65b9\u6cd5\uff0c\u4e0d\u80fd\u7701\u7565\u8fd4\u56de\u503c\u7c7b\u578b<\/li>\n<\/ul>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><span>12<\/span><br><span>13<\/span><br><span>14<\/span><br><span>15<\/span><br><span>16<\/span><br><span>17<\/span><br><span>18<\/span><br><span>19<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span># \u5b9a\u4e49\u9012\u5f52\u65b9\u6cd5\uff08\u6c42\u9636\u4e58\uff09<\/span><br><span>* <span>10<\/span> * <span>9<\/span> * <span>8<\/span> * <span>7<\/span> * <span>6<\/span> * ... * <span>1<\/span><\/span><br><span><\/span><br><span>scala&gt; <span><span>def<\/span> <span>m1<\/span><\/span>(x:<span>Int<\/span>)=&#123;<\/span><br><span>   | <span>if<\/span>(x==<span>1<\/span>) <span>1<\/span><\/span><br><span>   | <span>else<\/span> x * m1(x<span>-1<\/span>)<\/span><br><span>   | &#125;<\/span><br><span>&lt;console&gt;:<span>14<\/span>: error: recursive method m1 needs result <span><span>type<\/span><\/span><\/span><br><span><span>     <span>else<\/span> <span>x<\/span> <span>*<\/span> <span>m1<\/span>(<span>x-1<\/span>)<\/span><\/span><br><span><span>              <span>^<\/span><\/span><\/span><br><span><span><\/span><\/span><br><span><span><span>scala&gt;<\/span> <span>def<\/span> <span>m1<\/span>(<span>x:<span>Int<\/span><\/span>)<\/span>:<span>Int<\/span>=&#123;<\/span><br><span>   | <span>if<\/span>(x==<span>1<\/span>) <span>1<\/span><\/span><br><span>   | <span>else<\/span> x * m1(x<span>-1<\/span>)<\/span><br><span>   | &#125;<\/span><br><span>m1: (x: <span>Int<\/span>)<span>Int<\/span><\/span><br><span><\/span><br><span>scala&gt; m1(<span>10<\/span>)<\/span><br><span>res9: <span>Int<\/span> = <span>3628800<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u65b9\u6cd5\u7684\u53c2\u6570\" title=\"\u65b9\u6cd5\u7684\u53c2\u6570\"><\/a>\u65b9\u6cd5\u7684\u53c2\u6570<\/h3>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u9ed8\u8ba4\u53c2\u6570\" title=\"\u9ed8\u8ba4\u53c2\u6570\"><\/a>\u9ed8\u8ba4\u53c2\u6570<\/h4>\n<p>\u5728\u5b9a\u4e49\u65b9\u6cd5\u65f6\u53ef\u4ee5\u7ed9\u53c2\u6570\u5b9a\u4e49\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><span>11<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span># <span>1.<\/span> \u5b9a\u4e49\u4e00\u4e2a\u8ba1\u7b97\u4e24\u4e2a\u503c\u76f8\u52a0\u7684\u65b9\u6cd5\uff0c\u8fd9\u4e24\u4e2a\u503c\u9ed8\u8ba4\u4e3a<span>0<\/span><\/span><br><span># <span>2.<\/span> \u8c03\u7528\u8be5\u65b9\u6cd5<\/span><br><span><\/span><br><span>scala&gt; <span><span>def<\/span> <span>add<\/span><\/span>(x:<span>Int<\/span> = <span>0<\/span>, y:<span>Int<\/span> = <span>0<\/span>) = x + y<\/span><br><span>add: (x: <span>Int<\/span>, y: <span>Int<\/span>)<span>Int<\/span><\/span><br><span><\/span><br><span>scala&gt; add(<span>10<\/span>)<\/span><br><span>res14: <span>Int<\/span> = <span>10<\/span><\/span><br><span><\/span><br><span>scala&gt; add(<span>10<\/span>,<span>20<\/span>)<\/span><br><span>res15: <span>Int<\/span> = <span>30<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u5e26\u540d\u53c2\u6570\" title=\"\u5e26\u540d\u53c2\u6570\"><\/a>\u5e26\u540d\u53c2\u6570<\/h4>\n<p>\u5728\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u53c2\u6570\u7684\u540d\u79f0\u6765\u8fdb\u884c\u8c03\u7528\u3002<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>scala&gt; <span><span>def<\/span> <span>add<\/span><\/span>(x:<span>Int<\/span> = <span>0<\/span>, y:<span>Int<\/span> = <span>0<\/span>) = x + y<\/span><br><span>add: (x: <span>Int<\/span>, y: <span>Int<\/span>)<span>Int<\/span><\/span><br><span><\/span><br><span>scala&gt; add(x=<span>1<\/span>)<\/span><br><span>res16: <span>Int<\/span> = <span>1<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h4><a href=\"https:\/\/www.studytime.xin\/article\/#\u53d8\u957f\u53c2\u6570\" title=\"\u53d8\u957f\u53c2\u6570\"><\/a>\u53d8\u957f\u53c2\u6570<\/h4>\n<p>\u5982\u679c\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u4e0d\u56fa\u5b9a\u7684\uff0c\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\u7684\u53c2\u6570\u662f\u53d8\u957f\u53c2\u6570\u3002<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span><span><span>def<\/span> <span>\u65b9\u6cd5\u540d<\/span><\/span>(\u53c2\u6570\u540d:\u53c2\u6570\u7c7b\u578b*):\u8fd4\u56de\u503c\u7c7b\u578b = &#123;<\/span><br><span>\u65b9\u6cd5\u4f53<\/span><br><span>&#125;<\/span><br><span><span>\/\/\u5728\u53c2\u6570\u7c7b\u578b\u540e\u9762\u52a0\u4e00\u4e2a*\u53f7\uff0c\u8868\u793a\u53c2\u6570\u53ef\u4ee5\u662f0\u4e2a\u6216\u8005\u591a\u4e2a<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>scala&gt; <span><span>def<\/span> <span>add<\/span><\/span>(num:<span>Int<\/span>*) = num.sum<\/span><br><span>add: (num: <span>Int<\/span>*)<span>Int<\/span><\/span><br><span><\/span><br><span>scala&gt; add(<span>1<\/span>,<span>2<\/span>,<span>3<\/span>,<span>4<\/span>,<span>5<\/span>)<\/span><br><span>res17: <span>Int<\/span> = <span>15<\/span><\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u51fd\u6570\" title=\"\u51fd\u6570\"><\/a>\u51fd\u6570<\/h2>\n<p>scala\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u5c06\u6765\u7f16\u5199Spark\/Flink\u7a0b\u5e8f\u4e2d\uff0c\u4f1a\u5927\u91cf\u4f7f\u7528\u5230\u51fd\u6570<\/p>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u6cd5-1\" title=\"\u8bed\u6cd5\"><\/a>\u8bed\u6cd5<\/h3>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span><span>val<\/span> \u51fd\u6570\u53d8\u91cf\u540d = (\u53c2\u6570\u540d:\u53c2\u6570\u7c7b\u578b, \u53c2\u6570\u540d:\u53c2\u6570\u7c7b\u578b....) =&gt; \u51fd\u6570\u4f53<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<p>\u6ce8\u610f:<\/p>\n<ul>\n<li>\u51fd\u6570\u662f\u4e00\u4e2a\u5bf9\u8c61\uff08\u53d8\u91cf\uff09<\/li>\n<li>\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\uff0c\u51fd\u6570\u4e5f\u6709\u8f93\u5165\u53c2\u6570\u548c\u8fd4\u56de\u503c<\/li>\n<li>\u51fd\u6570\u5b9a\u4e49\u4e0d\u9700\u8981\u4f7f\u7528def\u5b9a\u4e49<\/li>\n<li>\u65e0\u9700\u6307\u5b9a\u8fd4\u56de\u503c\u7c7b\u578b<\/li>\n<\/ul>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><span>6<\/span><br><span>7<\/span><br><span>8<\/span><br><span>9<\/span><br><span>10<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>scala&gt; <span>val<\/span> add = (x:<span>Int<\/span>, y:<span>Int<\/span>) =&gt; x + y<\/span><br><span>add: (<span>Int<\/span>, <span>Int<\/span>) =&gt; <span>Int<\/span> = &lt;function2&gt;<\/span><br><span><\/span><br><span>scala&gt; add(<span>1<\/span>,<span>2<\/span>)<\/span><br><span>res3: <span>Int<\/span> = <span>3<\/span><\/span><br><span><\/span><br><span><\/span><br><span><span>\/\/\u4e00\u4e2a\u51fd\u6570\u6ca1\u6709\u8d4b\u4e88\u4e00\u4e2a\u53d8\u91cf\uff0c\u5219\u79f0\u4e3a\u533f\u540d\u51fd\u6570\uff0c<\/span><\/span><br><span><span>\/\/\u540e\u671f\u518d\u5b9e\u9645\u5f00\u53d1\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u57fa\u672c\u4e0a\u90fd\u662f\u4f7f\u7528\u533f\u540d\u51fd\u6570<\/span><\/span><br><span>(x:<span>Int<\/span>,y:<span>Int<\/span>)=&gt;x+y<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#\u65b9\u6cd5\u548c\u51fd\u6570\u7684\u533a\u522b\" title=\"\u65b9\u6cd5\u548c\u51fd\u6570\u7684\u533a\u522b\"><\/a>\u65b9\u6cd5\u548c\u51fd\u6570\u7684\u533a\u522b<\/h2>\n<ul>\n<li>\u65b9\u6cd5\u662f\u96b6\u5c5e\u4e8e\u7c7b\u6216\u8005\u5bf9\u8c61\u7684\uff0c\u5728\u8fd0\u884c\u65f6\uff0c\u5b83\u662f\u52a0\u8f7d\u5230JVM\u7684\u65b9\u6cd5\u533a\u4e2d<\/li>\n<li>\u53ef\u4ee5\u5c06\u51fd\u6570\u5bf9\u8c61\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cf\uff0c\u5728\u8fd0\u884c\u65f6\uff0c\u5b83\u662f\u52a0\u8f7d\u5230JVM\u7684\u5806\u5185\u5b58\u4e2d<\/li>\n<li>\u51fd\u6570\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u7ee7\u627f\u81eaFunctionN\uff0c\u51fd\u6570\u5bf9\u8c61\u6709apply\uff0ccurried\uff0ctoString\uff0ctupled\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u800c\u65b9\u6cd5\u5219\u6ca1\u6709<\/li>\n<\/ul>\n<h2><a href=\"https:\/\/www.studytime.xin\/article\/#10-4-\u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570\" title=\"10.4 \u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570\"><\/a>10.4 \u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570<\/h2>\n<p>\u6709\u65f6\u5019\u9700\u8981\u5c06\u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570\uff0c\u4f5c\u4e3a\u53d8\u91cf\u4f20\u9012\uff0c\u5c31\u9700\u8981\u5c06\u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570<br \/>\u4f7f\u7528<code>_<\/code>\u5373\u53ef\u5c06\u65b9\u6cd5\u8f6c\u6362\u4e3a\u51fd\u6570<\/p>\n<figure>\n<table>\n<tr>\n<td>\n<pre><span>1<\/span><br><span>2<\/span><br><span>3<\/span><br><span>4<\/span><br><span>5<\/span><br><\/pre>\n<\/td>\n<td>\n<pre><span>scala&gt; def add(x:Int,y:Int)&#x3D;x+y<\/span><br><span>add: (x: Int, y: Int)Int<\/span><br><span><\/span><br><span>scala&gt; val a &#x3D; add _<\/span><br><span>a: (Int, Int) &#x3D;&gt; Int &#x3D; &lt;function2&gt;<\/span><br><\/pre>\n<\/td>\n<\/tr>\n<\/table>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u53d8\u91cf\u58f0\u660e \u8bed\u6cd5\u683c\u5f0f 1 val&#038;#&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131739"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=131739"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131739\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=131739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=131739"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=131739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}