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遍历数组对象

Algorithm
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遍历数组对象

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/** 参数说明
 * arr: array = 被遍历 数组proto
 * objKey: string = filter
 * key: string = 当前筛选项
 */
getIndex = function (arr, objKey, key) {
  for (let i = 0; i < arr.length; i++) {
    if (arr[i][objKey] === key) {
      return i;
    }
  }
  return -1;
}
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for (const item of callback.data.items) {


  let inArr = getIndex(this.imgsCascade, "value", item.imgMode)

  let thisObj = array[inArr]

  if (inArr > -1) {
    thisObj.children ?
      thisObj.children.push(children) :
      thisObj.children = [children];
  } else {
    array.push(
      {
        value: item.imgMode,
        label: item.imgItem,
        children: [{xxx:xxx, yyy:yyy}]
      }
    )
  }
}
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{
function getIndex(arr, key) {
        for (let i = 0; i < arr.length; i++) {
                if (arr[i].key === key) {
                        return i;
                }
        }
        return -1;
}

function getKey(obj) {
        return obj.key;
}

var arr = [
  {
    key: '1'
  }, 
  {
    key: '2'
  }, 
  {
    key: '3'
  }
]
var a = {
        key: '1'
}
var c = {
        key: '1'
}
var b = {
        key: '4'
}

function pushToArr(val) {
        if (getIndex(arr, getKey(val)) > -1) {
                if (arr[getIndex(arr, getKey(val))].children) {
                        arr[getIndex(arr, getKey(val))].children.push(val)
                } else {
                        arr[getIndex(arr, getKey(val))].children = [val]
                }
        } else {
                arr.push(val)
        }
}
pushToArr(a)
console.log(arr);
pushToArr(c)
console.log(arr);
}
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{
        function hasKey(arr, key) {

                var ret = false;

                for (let i = 0; i < arr.length; i++) {
                        if (arr[i].key === key) {
                                ret = true;
                                break;
                        }
                }
                return ret;
        }

        function getKey(obj) {
                return obj.key;
        }

        var arr = [{
                        key: '1',
                        children: [

                        ]
                },
                {
                        key: '2',
                        children: [

                        ]
                },
                {
                        key: '3',
                        children: [

                        ]
                }
        ]

        var a = {
                key: '1'
        }

        var b = {
                key: '4'
        }
        console.log(hasKey(arr, getKey(a)));
        console.log(hasKey(arr, getKey(b)));
}

{
        function getIndex(arr, objKey, key) {
                for (let i = 0; i < arr.length; i++) {
                        if (arr[i].key === key) {
                                return i;
                        }
                }
                return -1;
        }

        function getKey(obj) {
                return obj.key;
        }
        var arr = [{
                key: '1'
        }, {
                key: '2'
        }, {
                key: '3'
        }]
        var a = {
                key: '1'
        }
        var b = {
                key: '4'
        }

        function pushToArr(val) {
                if (getIndex(arr, getKey(val)) > -1) {
                        arr[getIndex(arr, getKey(val))].children = [val]
                } else {
                        arr.push(val)
                }
        }
        pushToArr(b)
        console.log(arr);
}

{
        function getIndex(arr, key) {
                for (let i = 0; i < arr.length; i++) {
                        if (arr[i].key === key) {
                                return i;
                        }
                }
                return -1;
        }

        function getKey(obj) {
                return obj.key;
        }

        var arr = [{
                key: '1'
        }, {
                key: '2'
        }, {
                key: '3'
        }]
        var a = {
                key: '1'
        }
        var c = {
                key: '1'
        }
        var b = {
                key: '4'
        }

        function pushToArr(val) {
                if (getIndex(arr, getKey(val)) > -1) {
                        if (arr[getIndex(arr, getKey(val))].children) {
                                arr[getIndex(arr, getKey(val))].children.push(val)
                        } else {
                                arr[getIndex(arr, getKey(val))].children = [val]
                        }
                } else {
                        arr.push(val)
                }
        }
        pushToArr(a)
        console.log(arr);
        pushToArr(c)
        console.log(arr);
}