ES6如何获取filter()方法的源代码 [英] ES6 how to get source code for filter( ) method

问题描述

到目前为止，我已经尝试重现方法 filter 了:

I've tried to reproduce the method filter so far I have got:

function filtre(...[T,x,y]){
let tabPersF = [];
for (let pers of T) {
    if (x(...[pers,y])) {
      tabPersF.push( pers ); 
     }

}
  return tabPersF;
}

怎么样?

推荐答案

所以我试着重现我得到的方法过滤器，我知道不好.

So I've tried to reproduce the method filter I got this and I know it's not good.

此代码存在多个问题

• array2 未初始化
• array2 不是 array ，什么是 puts
• function 关键字作为参数

• array2 not initialized
• array2 not an array and what is puts
• function keyword as parameter

制作

function filter(array, func) {
  let array2 = [];
  for ( var counter = 0; counter < array.length; counter++) {       
    if (func(array[counter], counter, array )) {
      array2.push(array[counter]);
    }
  }
  return array2;
}

console.log( filter( [1,2,3], function(s){ return s>1 } ) );

console.log( filter( ["132","322","23433"], function(s){ return s.length>3 } ) );

var arr = [ {name: "asdasd", age: 10}, {name: "asdasd2", age: 20} ];

console.log( filter( arr , function(s){ return s.age>19 } ) );

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