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  • js for 获取对象属性

    var arr = ['a', 'b', 'c'];
    // 1
    for (var index = 0; index < arr.length; index++)
    {
    	console.log(arr[index]);
    }
    
    // 2 ES5
    arr.forEach(function (value) {
    	console.log(value);
    });
    
    // 3  for-in work the array or string or other collections that will return an index  
    for (var index in arr)
    {
            console.log(arr[index]);
    }
    
    // 4 ES6
    for (var value of arr)
    {
    	console.log(value);
    }
    
    
    
    // the for-of also works on strings,set, map
    var str = "hello boy";
    for (var s of str)
    {
    	console.log(s);
    }
    
    var words = ['just', 'do', 'it', 'it'];
    var uniqueWords = new Set(words);
    // console.log(uniqueWords);
    for (var word of uniqueWords)
    {
    	console.log(word);
    }
    
    
    var MyMap = new Map();
    
    for (var index in Map)
    {
    	  
    }
    

      

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  • 原文地址:https://www.cnblogs.com/ax-null/p/6803943.html
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