javascript 未插入数组

Question

我正在循环一个 json 对象，并在该对象中获取一个包含逗号分隔字符串的项目，然后分割该字符串并检查它是否在数组中，如果不在数组中，则应将其插入数组中。问题是，它永远不会插入数组

for (var item = 0; item < rules.length; item++) {
    //we now need to split the item by its delimiter which is a comma ','
    var treeSplit = rules[item].tree.split(',');

    if (treeSplit.length - 1 != childCount) {
        if (isInArray(treeSplit[childCount], aliasGroup)) {
            aliasGroup.push(treeSplit[childCount]);
        }
    } else {
        //do something
    }

这是我的 isInArray 函数，它需要一个值和数组

function isInArray(value, array) {
    return array.indexOf(value) > -1;
}

Answer 1

and if not it should push it into the array

您错过了不是。仅当它已经在数组中时，才将其插入数组中。添加logical not operator ( ! ) :

if ( ! isInArray(treeSplit[childCount], aliasGroup) ) {
    aliasGroup.push(treeSplit[childCount]);
}