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  • 转:JS提取数组的某一属性组成新的数组

    原博客地址: https://blog.csdn.net/u012732909/article/details/114996684

    例:

     1 arrold = [
     2  
     3   {name: "name1", age: "1"},
     4   {name: "name2", age: "2"},
     5   {name: "name3", age: "3"},
     6   {name: "name4", age: "4"},
     7   {name: "name5", age: "5"},
     8   {name: "name6", age: "6"}
     9 ]
    10  
    11 arrnew = ["name1","name2","name3","name4","name5","name6"]

     方法一:

    1 let arr = [];
    2 arrold.forEach(e => { 
    3     arrnew.push(e.name)
    4 })

    方法二:

    1 let arrnew = arrold.map((obj,index) => {
    2     return obj.name;
    3 }).join(",").split(',')

    方法二改进:

    1 let arrnew = arrold.map((item,index) => {
    2     return Object.assign({},{'name':item.name})
    3 })

    关于Object.assign(target,sources)方法:拷贝源对象且可枚举的属性到目标对象,如果目标对象中的属性具有相同的键,则属性将被源中的属性覆盖。例:

    1 const object1 = { a: 1, b: 2, c: 3 }; 
    2 // object2: a=1, b=2, c=3, d=5 
    3 const object2 = Object.assign({c: 4, d: 5}, object1);
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  • 原文地址:https://www.cnblogs.com/luyj00436/p/15402700.html
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