Question

我正在尝试在数组中找到一个元素。这是小提琴：

var selectedVals = [630, 85];
var registeredVals = [17, 630, 85];
var newList = [];

$(selectedVals).each(function () {
    //registeredVals.splice($.inArray(this, registeredVals), 1);
    var num = this;
    alert("Value="+ num + " Array=" + registeredVals);
    //alert(registeredVals.indexOf(num));
    alert($.inArray(this, registeredVals));

    if($.inArray(this, registeredVals) == -1)
         newList.push(this);
    })

https://jsfiddle.net/programmedprojects/7m9zrjwL/

我尝试使用.indexOf和$ .inArray来查找循环中的元素。

当元素在数组中时，索引是否应该大于-1？

Answer 1

如果您想知道selectedVals和registeredVals上的元素，可以使用filter()并使用includes()来检查数组中是否存在变量。

var selectedVals = [630, 85, 99];
var registeredVals = [17, 630, 85];

var newList = selectedVals.filter(o => registeredVals.includes(o));

console.log(newList);

没有ES6

var selectedVals = [630, 85, 99];
var registeredVals = [17, 630, 85];
var newList = [];

for (var i = 0; i < selectedVals.length; i++) {
  if (registeredVals.indexOf(selectedVals[i]) !== -1) newList.push(selectedVals[i]);
}

console.log(newList);

jQuery在数组中查找元素

1 个答案: