Javascript 用逗号 (,) 分隔并检查是否有任何值 = "something"

Separate by comma (,) and check if any of the values is = "something"

提问by Mark Topper

How can I somehow split/separate my JavaScript variable by comma (,).
And then check if value-of-any-of-the-separated-strings = "something"

我怎样才能用逗号 (,) 以某种方式拆分/分隔我的 JavaScript 变量。
然后检查是否value-of-any-of-the-separated-strings = "something"

For example, my variable has the value 1,2,3,4,5,6,7,8,9,10,2212312, and I want to check if any of the numbers are = 7in a IF-Statement.

例如，我的变量的值为1,2,3,4,5,6,7,8,9,10,2212312，我想检查是否有任何数字= 7在 IF 语句中。

Does anyone have any ideas how this can be done?

有没有人有任何想法如何做到这一点？

回答by Ian

First, split the string by ",". Then, use indexOfon the split-string array to see if the target string is found (-1means it wasn't found in the array). For example:

首先，将字符串拆分为","。然后，indexOf在拆分字符串数组上使用以查看是否找到了目标字符串（-1意味着在数组中未找到它）。例如：

var str = "1,2,3,4,5,6,7,8,9,10,10,2212312";
var split_str = str.split(",");
if (split_str.indexOf("7") !== -1) {
    // Original string contains 7
}

---

---

References:

参考：

• String.prototype.split- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split
• Array.prototype.indexOf- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf

• String.prototype.split- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split
• Array.prototype.indexOf- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf

回答by zzzzBov

This is a simple application of Array.prototype.some:

这是一个简单的应用程序Array.prototype.some：

var yourVar = '1,2,3,4,5,6,7,8,9,10,2212312';
function isSeven(val) {
    return val === '7';
}
if (yourVar.split(',').some(isSeven)) {
    //do stuff
}

Another common waythis could be written is:

另一种常见的写法是：

if (~yourVar.split(',').indexOf('7')) {
    //do stuff
}

Or if Array.prototype.containshas been defined:

或者如果Array.prototype.contains已经定义：

if (yourVar.split(',').contains('7')) {
    //do stuff
}

Or if you want to use a regular expression:

或者，如果您想使用正则表达式：

if (/(?:^|,)7(?:,|$)/.test(yourVar)) {
    //do stuff
}

_{Note:Array.prototype.some, Array.prototype.indexOfand Array.prototype.containsall require polyfills to work correctly cross browser.}

_{注意：Array.prototype.some，Array.prototype.indexOf并且Array.prototype.contains都需要 polyfills 才能跨浏览器正常工作。}

回答by Bartek

Split it into an Array, then use indexOf to see if it's there. If it returns -1, it isn't.

将其拆分为一个数组，然后使用 indexOf 来查看它是否存在。如果它返回-1，则不是。

"1,2,3,4,5,6,7,8,9,10,2212312".split(",").indexOf("7")

回答by epascarello

Use splitand Array.indexOf()

使用split和Array.indexOf()

var str = "1,2,3,4,5,6,7,8,9,10,2212312";
var num = 7;
var pieces = str.split(",");
var index = pieces.indexOf(num.toString());

It can be done with regular expressions too

也可以用正则表达式来完成

var str = "1,2,3,4,5,6,7,8,9,10,2212312";
var num = 7;    
var re = new RegExp("(^|,)" + num + "($|,)");
alert(re.test(str));

jsFiddle example

jsFiddle 示例

回答by jbabey

use splitalong with indexOf:

使用split连同indexOf：

var someString = '1,2,3,4,5,6,7,8,9,10,2212312';
var splitArray = someString.split(',');
var sevenPosition = splitArray.indexOf('7');

http://jsfiddle.net/jbabey/f4NLY/

http://jsfiddle.net/jbabey/f4NLY/

回答by KooiInc

You could use Array.filter, something like:

您可以使用Array.filter，例如：

var values = '1,2,3,4,5,6,7,8,9,10,2212312'.split(','), find = 7;
if ( values.filter(function(a){return +a === find;}).length ) { /* ... */ }

回答by Vishal Zanzrukia

man i hope it will help you.

伙计，我希望它会帮助你。

    var yourValues = '1,2,3,4,5,6,7,8,9,10,2212312';
    var array = yourValues.split(",");
    boolean isValue = false;
    for(i in array)
    {
       if(array[i]=='7')
       {
             isValue=true;
       }
    }


    if(isValue)
        alert("your number is in the string");
    else
        alert("your number is in the string");

回答by Carlos Martinez T

Are you looking for the "contains" function. You can use jQuery for this.

您是否正在寻找“包含”功能。您可以为此使用 jQuery。

if ($.inArray(7, value-of-any-of-the-seperated-strings))
{
   console.log("there is a 7!")
}