Question

我有两个像这样的javascript数组。

var category = ['Jacket'];
var subcategory = ['Woman', 'Men', 'Kids'];

我希望像这样组合数组值

var finalCategory = ['Jacket Woman', 'Jacket Men', 'Jacket Kids'];

如果类别不止一个，最终结果

var category = ['Jacket', 'Bags'];
var subcategory = ['Woman', 'Men', 'Kids'];
var finalCategory = ['Jacket Woman', 'Jacket Men', 'Jacket Kids', 'Bags Woman', 'Bags Men', 'Bags Kids'];

请帮助，谢谢。

Answer 1

您可以使用嵌套循环创建cartesian product。

＆＃13;

var category = ['Jacket', 'Bags'],
    subcategory = ['Woman', 'Men', 'Kids'],
    result = category.reduce(function (r, a) {         // use an accumulator and item
        return r.concat(subcategory.map(function (b) { // concat result of mapped subs
            return [a, b].join(' ');                   // build string with given items
        }));
    }, []);                                            // take array as accumulator

console.log(result);

＆＃13;

ES6

＆＃13;

var category = ['Jacket', 'Bags'],
    subcategory = ['Woman', 'Men', 'Kids'],
    result = category.reduce((r, a) => r.concat(subcategory.map(b => [a, b].join(' '))), []);

console.log(result);

＆＃13;

Answer 2

var category = ['Jacket', 'Bags'];
var subcategory = ['Woman', 'Men', 'Kids'];
var finalCategory = []

for(var i = 0; i < category.length; i++){
    for(var ii = 0; ii < subcategory.length; ii++){
        finalCategory.push(category[i] + ' ' + subcategory[ii])    
    }
}
console.log(finalCategory)

嵌套循环。一个涵盖所有主要类别，然后涵盖其中的子类别。

Answer 3

您可以使用

var category = ['Jacket', 'Bags'];
var subcategory = ['Woman', 'Men', 'Kids'];
var combos = [];
category.forEach(function(a){
    subcategory.forEach(function(b){
        combos.push(a + ' ' + b);
    });
});

Answer 4

使用嵌套for循环创建一个新数组：

＆＃13;

function concatArr(arr1, arr2) {
  var newArr = [];
  for (var a = 0; a < arr1.length; a++) {
    var arr1Value = arr1[a];
    for (var b = 0; b < arr2.length; b++) {
      var arr2Value = arr2[b];
      newArr.push(arr1Value + " " + arr2Value);
    }
  }
  return newArr;
}
//TEST
var category = ['Jacket', 'Pants'];
var subcategory = ['Woman', 'Men', 'Kids'];
console.log(concatArr(category, subcategory));

＆＃13;

如何将文本追加到数组值JavaScript

4 个答案: