用正则表达式替换 select 索引属性

replace select indexed attributes with regexp

我有以下 DOM :

<select id="evo_calculatorbundle_ruletype_assertions_0_logicalOperator">...</select>
<select id="evo_calculatorbundle_ruletype_assertions_1_logicalOperator">...</select>

使用 JqueryUI Sortable 组件,我正在对这些 select 标签进行排序。排序后,#1 select 排在#0 select 之前。 我想根据新的 DOM.

重新索引这些 select

这是我的可排序实例:

// Sortable assertions
$collectionHolder.sortable({
    placeholder: "ui-state-highlight",
    handle: ".handle",
    helper: "original",
    cursor: "move",
    update: function(event, ui) {
        var elements = $collectionHolder.find("tr");
        var count = elements.length;
        console.log(count);

        $(elements).each(function(index) {
            $(this).data('index', index).attr('data-index', index);

            var pattern = '/_[0-9]+_/g';
            var replacement = '_' + index + '_';

            $(this).find('select').each(function(){
                var before = $(this).attr('id');
                var after = $(this).attr('id').replace(pattern, replacement);
                console.log(before + " " + after);

                $(this).attr('id', $(this).attr('id').replace(pattern, replacement));
                $(this).css('border', '3px solid black');
            });
        });
    }
});

替换不起作用,console.log(before + " " + after) 打印以下内容:

evo_calculatorbundle_ruletype_assertions_1_logicalOperator evo_calculatorbundle_ruletype_assertions_1_logicalOperator
evo_calculatorbundle_ruletype_assertions_0_logicalOperator evo_calculatorbundle_ruletype_assertions_0_logicalOperator

我预计

evo_calculatorbundle_ruletype_assertions_1_logicalOperator evo_calculatorbundle_ruletype_assertions_0_logicalOperator
evo_calculatorbundle_ruletype_assertions_0_logicalOperator evo_calculatorbundle_ruletype_assertions_1_logicalOperator

我在 replace javascript 功能上做错了吗?还是我的模式不对?

javascript中的正则表达式是用斜杠括起来的,如果用单引号括起来,它就是一个字符串。

使用:

var pattern = /_[0-9]+_/g;