从ECMAScript 6开始，你可以使用Array.prototype.find。这可以在Firefox(25.0)、Chrome(45.0)、Edge(12)和Safari(7.1)中实现，但不能在Internet Explorer或其他一堆旧的或不常见的平台上实现。

例如，下面的x为106:

Const x =[100,101,102,103,104,105,106,107,108,109]。Find (function (el) { 返回el > 105; })； console.log (x);

If you want to use this right now but need support for IE or other unsupporting browsers, you can use a shim. I recommend the es6-shim. MDN also offers a shim if for some reason you don't want to put the whole es6-shim into your project. For maximum compatibility you want the es6-shim, because unlike the MDN version it detects buggy native implementations of find and overwrites them (see the comment that begins "Work around bugs in Array#find and Array#findIndex" and the lines immediately following it).

自ES6以来，数组有原生的find方法;一旦找到第一个匹配项并返回值，就停止枚举数组。

const result = someArray.find(isNotNullNorUndefined);

旧的回答:

我不得不发布一个答案来阻止这些过滤建议:-)

既然ECMAScript中有这么多函数风格的数组方法，也许已经有这样的东西了?

可以使用some Array方法迭代数组，直到满足某个条件(然后停止)。不幸的是，它只返回条件是否满足过一次，而不是由哪个元素(或在哪个索引处)满足的。所以我们要稍微修改一下:

function find(arr, test, ctx) {
    var result = null;
    arr.some(function(el, i) {
        return test.call(ctx, el, i, arr) ? ((result = el), true) : false;
    });
    return result;
}

var result = find(someArray, isNotNullNorUndefined);

Javascript中没有内置函数来执行此搜索。

如果你正在使用jQuery，你可以做一个jQuery. inarray(元素，数组)。

从ECMAScript 6开始，你可以使用Array.prototype.find。这可以在Firefox(25.0)、Chrome(45.0)、Edge(12)和Safari(7.1)中实现，但不能在Internet Explorer或其他一堆旧的或不常见的平台上实现。

例如，下面的x为106:

Const x =[100,101,102,103,104,105,106,107,108,109]。Find (function (el) { 返回el > 105; })； console.log (x);

If you want to use this right now but need support for IE or other unsupporting browsers, you can use a shim. I recommend the es6-shim. MDN also offers a shim if for some reason you don't want to put the whole es6-shim into your project. For maximum compatibility you want the es6-shim, because unlike the MDN version it detects buggy native implementations of find and overwrites them (see the comment that begins "Work around bugs in Array#find and Array#findIndex" and the lines immediately following it).

我从互联网上的多个来源获得灵感，推导出下面的解决方案。希望考虑到一些默认值，并提供一种方法来比较每个条目的通用方法，这就解决了。

用法:(给出值“秒”)

var defaultItemValue = { id: -1, name: "Undefined" };
var containers: Container[] = [{ id: 1, name: "First" }, { id: 2, name: "Second" }];
GetContainer(2).name;

实现:

class Container {
    id: number;
    name: string;
}

public GetContainer(containerId: number): Container {
  var comparator = (item: Container): boolean => {
      return item.id == containerId;
    };
    return this.Get<Container>(this.containers, comparator, this.defaultItemValue);
  }

private Get<T>(array: T[], comparator: (item: T) => boolean, defaultValue: T): T {
  var found: T = null;
  array.some(function(element, index) {
    if (comparator(element)) {
      found = element;
      return true;
    }
  });

  if (!found) {
    found = defaultValue;
  }

  return found;
}

使用过滤器并从结果数组中获得第一个索引如何?

var result = someArray.filter(isNotNullNorUndefined)[0];