Javascript 使用 Jquery 查找子字符串?

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时间:2020-08-23 02:11:56  来源:igfitidea点击:

Find substring with Jquery?

javascriptjquery

提问by CMS

How would our group find out if a particular string contains a certain substring? Only with the help of jquery, please.

我们的小组如何确定特定字符串是否包含某个子字符串?请仅在jquery的帮助下。

回答by CMS

You don't really need jQuery for such a simple thing, you can simply use the indexOfmethod of String objects, e.g.:

对于这么简单的事情,您实际上并不需要 jQuery,您可以简单地使用indexOfString 对象的方法,例如:

var str = "foobar";
var containsFoo = str.indexOf('foo') >= 0; // true

The indexOfmethod returns the character index where the first occurrence of the specified value is encountered, if not found, it returns -1.

indexOf方法返回遇到指定值第一次出现的字符索引,如果未找到,则返回-1

回答by Anurag

Why use 10 characters when 100 will do?

当 100 个字符时为什么要使用 10 个字符?

Here's the requested jQuery plugin:

这是请求的 jQuery 插件:

jQuery.isSubstring = function(haystack, needle) {
    return haystack.indexOf(needle) !== -1;
};

Usage:

用法:

$.isSubstring("hello world", "world")); // true;???????????

回答by Jason Jong

If your limited to jQuery which is just JavaScript... you can use the filter

如果您仅限于 jQuery,它只是 JavaScript……您可以使用过滤器

var subgtSel = $("#jquerySelector").filter(function(i) {
    // do your filter here
    return $(this).attr("data-timestamp") <= subMsg.CreateDateTimeStamp;
});

the subgtSelbecomes your new jQuery now with the relevant filter in the above. In the above, I am looking for all div elements that have an attribute that is less than the subMsg.CreateTimeStamp.

subgtSel成为新的与上述有关的过滤器现在jQuery的。在上面,我正在寻找属性小于 subMsg.CreateTimeStamp 的所有 div 元素。

If your looking for a particular substring... you can do the following with jQuery right in the selector

如果您正在寻找特定的子字符串...您可以在选择器中使用 jQuery 执行以下操作

var sel = $("#jquerySelector:contains('text')");

see http://api.jquery.com/contains-selector/

http://api.jquery.com/contains-selector/