{"id":108094,"date":"2020-05-31T02:10:34","date_gmt":"2020-05-30T18:10:34","guid":{"rendered":"http:\/\/4563.org\/?p=108094"},"modified":"2020-05-31T02:10:34","modified_gmt":"2020-05-30T18:10:34","slug":"%e5%85%b3%e4%ba%8e-typescript-%e9%87%8c%e7%9a%84%e6%b3%9b%e5%9e%8b%ef%bc%88generics%ef%bc%89%ef%bc%8c%e4%b8%8d%e5%a4%aa%e7%90%86%e8%a7%a3%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e8%bf%99%e4%b9%88%e7%b9%81","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=108094","title":{"rendered":"\u5173\u4e8e typescript \u91cc\u7684\u6cdb\u578b\uff08Generics\uff09\uff0c\u4e0d\u592a\u7406\u89e3\u4e3a\u4ec0\u4e48\u8981\u8fd9\u4e48\u7e41\u7410\uff1f"},"content":{"rendered":"
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\u5173\u4e8e typescript \u91cc\u7684\u6cdb\u578b\uff08Generics\uff09\uff0c\u4e0d\u592a\u7406\u89e3\u4e3a\u4ec0\u4e48\u8981\u8fd9\u4e48\u7e41\u7410\uff1f <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : find456789 <\/span> <\/i> 1<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u6bd4\u5982\u8fd9\u4e00\u6bb5\u4ee3\u7801\uff1a<\/p>\n

function identity<T>(arg: T): T {     return arg; } <\/code><\/pre>\n
\u4e3a\u4ec0\u4e48\u4e0d\u5199\u6210\u8fd9\u6837\u5462\uff1f\u5220\u6389 <T> \u4e0d\u662f\u770b\u4e0a\u53bb\u66f4\u7b80\u5355\u5417<\/p>\n
function identity(arg: T): T {     return arg; } <\/code><\/pre>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (16<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : abbycin <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u8981\u5199 cpp \u8fd8\u4f1a\u770b\u5230 template<typename T> auto identify (T arg) -> T { return arg ; }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : hua123s <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 type T = {
     \u6211\u8fd8\u7528\u4e0d\u7528\u4e86
    }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : Aynamic <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u56fe\u4e00\u4f60\u53ef\u4ee5\u7406\u89e3\u4e3a T \u662f\u4e00\u4e2a\u672a\u786e\u5b9a\u7684\u7c7b\u578b\uff0c\u8c03\u7528\u65b9\u6cd5\u65f6\u5019\u53ef\u4ee5\u6307\u660e T \u7684\u7c7b\u578b\uff0c\u56fe\u4e8c T \u662f\u4e00\u4e2a\u5df2\u77e5\u7684\u7c7b\u578b\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : wysnylc <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e5f\u8ba9\u4f60\u4eec\u4f53\u4f1a\u4e0b Java \u6cdb\u578b\u5e26\u6765\u7684\u6050\u60e7\u560e\u560e\u560e                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : BingoXuan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 <>\u662f\u58f0\u660e\u6cdb\u578b\u7528\u7684\u5427\uff0c\u4f8b\u5982<T,S>\u5c31\u58f0\u660e\u6cdb\u578b T \u548c S \u53ef\u4ee5\u7528\u3002<\/p>\n
    \u6211\u89c9\u5f97 Python \u7684\u6cdb\u578b\u58f0\u660e\u624d\u662f\u6700\u6076\u5fc3\u7684                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : eGlhb2Jhb2Jhbw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u89c9\u5f97\u7f16\u8bd1\u5668\u600e\u4e48\u77e5\u9053\u4f60\u662f\u60f3\u7528\u6cdb\u578b\u8fd8\u662f\u624b\u6b8b\u6572\u51fa\u4e86\u4e2a\u672a\u5b9a\u4e49\u7684\u7c7b\u578b\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : jswh <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 <T>\u91cc\u7684 T \u662f\u58f0\u660e\uff0c\u58f0\u660e\u4e86\u4e4b\u540e\u540e\u9762\u624d\u53ef\u4ee5\u7528\u9e2d\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : cxe2v <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5fae\u8f6f\u7684\u6cdb\u578b\u6700\u65e9\u51fa\u73b0\u5728.NET \u91cc\u9762\uff0c.NET \u6cdb\u578b\u7684\u5b9a\u4e49\u91cc\u6709\u4e2a\u7c7b\u578b\u53c2\u6570\uff0c\u7c7b\u578b\u53c2\u6570\u5c31\u662f\u7528\u6765\u7ed9\u5b9e\u9645\u7c7b\u578b\u4f7f\u7528\u65f6\u5019\u7684\u5360\u4f4d\u7b26\uff0c\u521b\u5efa\u6cdb\u578b\u7c7b\u7684\u65f6\u5019\uff0c\u9700\u8981\u5c06 T \u66ff\u6362\u6210\u5b9e\u9645\u7c7b\u578b\uff0c\u4f8b\u5982
    “`c#
    public class identity{
     public T A<T>(T arg){
     return arg;
     }
    }<\/p>\n
    identity I=new identity();
    I.A<int>(1);
    “`
    \u4f60\u770b\u5982\u679c\u6ca1\u6709`<T>`\u8fd9\u4e2a\u7c7b\u578b\u53c2\u6570\u7684\u8bdd\uff0c\u7f16\u8bd1\u5668\u65e0\u6cd5\u5728\u7f16\u8bd1\u671f\u95f4\u5c31\u68c0\u67e5\u7c7b\u578b\u9519\u8bef\uff0c\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u7c7b\u578b\u8f6c\u6362\u548c\u53ef\u80fd\u7684\u7c7b\u578b\u9519\u8bef\uff0c\u800c typescript \u662f\u5fae\u8f6f\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\uff0c\u5728\u8bbe\u8ba1\u4e0a\u4f1a\u6709\u540c\u6837\u7684\u5f62\u5f0f\uff0c\u6240\u4ee5\u4f60\u8fd9\u91cc\u7684\u8fd9\u4e2a`<T>`\u4e0d\u80fd\u591f\u7701\u7565\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : find456789 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @jswh 
    @BingoXuan 
    @eGlhb2Jhb2Jhbw <\/p>\n
    \u54e6 \u8c22\u8c22\uff0c\u4f3c\u4e4e\u6709\u4e00\u4e9b\u660e\u767d\u4e86<\/p>\n
    \u5192\u6627\u518d\u8bf7\u6559\u4e00\u4e0b<\/p>\n
    \u95ee\u9898 1\uff1a \u5982\u679c\u6211\u4e0d\u52a0<T>\uff0c \u7f16\u8bd1\u5668 \u6709\u53ef\u80fd\u4ee5\u4e3a T \u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684 interface \u6216\u8005 type \u5bf9\u5417\uff1f<\/p>\n
    \u95ee\u9898 2\uff1a \u5982\u679c\u6211\u52a0\u4e86 <T>\uff0c \u5c31\u662f \u5148\u544a\u8bc9\u7f16\u8bd1\u5668\uff0c\u63a5\u4e0b\u6765\u7684 T \u662f\u4e2a\u6cdb\u578b\uff0c\u800c\u4e0d\u662f\u81ea\u5b9a\u4e49 interfa \u3001type\uff0c \u5bf9\u5417                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : winnerczwx <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5728 c#\u91cc\u53ef\u4ee5\u8fd9\u6837\u7b80\u5199                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : killergun <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u770b\u770b C#\u7684\u6cdb\u578b\u5c31\u77e5\u9053\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : Jirajine <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6cdb\u578b\u5c31\u662f\u628a\u7c7b\u578b\u53c2\u6570\u5316\uff0c<T>\u7684\u610f\u601d\u662f\u63a5\u6536\u4e00\u4e2a\u7c7b\u578b\u4f5c\u4e3a\u53c2\u6570\uff0c\u540e\u9762\u7684 T \u662f\u5728\u4f7f\u7528\u8fd9\u4e2a\u53c2\u6570\u3002\u5c31\u50cf\u4e00\u822c\u7684\u53d8\u91cf\u628a\u6570\u636e\u53c2\u6570\u5316\u4e00\u6837\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : mxalbert1996 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e3b\u662f\u4e0d\u662f\u4ee5\u4e3a\u6cdb\u578b\u7684\u7c7b\u578b\u53ea\u80fd\u7528 T \u8868\u793a\uff1f\u7136\u800c\u5e76\u4e0d\u662f\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : CosimoZi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6709\u5174\u8da3\u53ef\u4ee5\u8bfb\u70b9\u8303\u7574\u8bba,\u5bf9\u6cdb\u578b\u7684\u672c\u8d28\u4f1a\u6709\u66f4\u6df1\u7684\u7406\u89e3.\u672c\u8d28\u4e0a\u50cf lz \u4e3e\u4f8b\u7684\u5e26\u6cdb\u578b\u7684\u51fd\u6570\u8868\u8fbe\u4e86\u81ea\u7136\u53d8\u6362(natural transformation),\u548c\u4e00\u822c\u7684\u51fd\u6570\u5728\u6570\u5b66\u610f\u4e49\u4e0a\u5c31\u4e0d\u4e00\u6837.                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : aguesuka <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 java \u91cc\u9762\u53ef\u4ee5\u8fd9\u6837\u8c03\u7528\u6cdb\u578b\u51fd\u6570 identity<MyType>(param); \u5728 param \u662f lambda \u7684\u65f6\u5019\uff0c\u6709\u65f6\u5c16\u62ec\u53f7\u662f\u4e0d\u80fd\u7701\u7565\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : BingoXuan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @find456789 
    \u662f\u7684\uff0c\u6cdb\u578b\u662f\u6839\u636e\u8303\u578b\u4f7f\u7528\u7684\u4e0a\u4e0b\u6587\u63a8\u65ad\u7684\u7c7b\u578b\u3002\u5982\u679c\u6cdb\u578b\u58f0\u660e\u65f6\u79bb\u5f00\u4e86\u4f7f\u7528\u4e0a\u4e0b\u6587\uff0c\u90a3\u5c31\u6ca1\u6709\u610f\u4e49\u4e86\u3002\u6240\u4ee5\u9700\u8981\u901a\u8fc7<T,…>\u58f0\u660e\uff0c\u5e76\u4f20\u9012\u7ed9\u4e0a\u4e0b\u6587\u4f7f\u7528\u3002<\/p>\n
    \u5982\u679c\u4e0d\u7ed3\u5408\u8fd0\u7528\u6cdb\u578b\u7684\u4e0a\u4e0b\u6587\u6765\u58f0\u660e\uff0c\u7cdf\u7cd5\u7684\u4f8b\u5b50\u5c31\u662f python3 \u7684\u6cdb\u578b\u4e86\u3002\u7b80\u76f4\u5c31\u53ea\u591a\u6b64\u4e00\u4e3e\u3002\u4ee3\u7801\u91cf\u4e00\u591a\uff0c\u6cdb\u578b\u58f0\u660e\u5c31\u88ab\u6df9\u6ca1 \u4e86\u3002\u5177\u4f53\u7c7b\u578b\u548c\u6cdb\u578b\u7528\u8d77\u6765\u4e00\u6bdb\u4e00\u6837\u3002\u5982\u4e0b\u4ee3\u7801\uff0c\u4f60\u5b8c\u5168\u4e0d\u77e5\u9053\u6709\u6ca1\u6709\u7528\u5230\u6cdb\u578b\uff0c\u5982\u679c\u63d0\u524d\u58f0\u660e T \u662f\u7c7b\u578b str\uff0c\u90a3\u4e48\u6254\u4e00\u4e2a int \u5176\u5b9e\u4f1a\u62a5\u7c7b\u578b\u4e0d\u6b63\u786e\u7684\u3002<\/p>\n
    def Add(a:T,b:T)->T                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u5173\u4e8e typescript \u91cc\u7684\u6cdb…<\/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\/108094"}],"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=108094"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/108094\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=108094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=108094"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=108094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}