一个angular.js过滤器反极性 [英] Reverse polarity of an angular.js filter

问题描述

鉴于如果某些条件得到满足，则返回true过滤器的方法，是有可能援引HTML，例如它的反面使用方法：

Given a filter method that returns true if some condition is met, is it possible to invoke its opposite in HTML, e.g. to use:

"item in items | filter:!AllDay"

而不是

"item in items | filter:AllDay"

？或者你有维护两个单独的过滤方法（一个假，如果为true）？

? Or do you have to maintain two separate filter methods (one for false and one for true)?

推荐答案

正如<一说href=\"http://stackoverflow.com/questions/13278371/angularjs-filter-negated/13450568#13450568\">ENDOH （这太问题在技术上是重复的），你可以通过否定prepending过滤器'！以过滤字符串，像这样的：

As noted by ENDOH (this SO question is technically a duplicate), you can negate a filter by prepending '!' to the filter string, like this:

filter:'!'+myFilter

注意'！被引述。该文档是不会在这个非常清楚，并举例会有帮助。

Note that the '!' is quoted. The documentation is not terribly clear on this, and an example there would be helpful.

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