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angular 过滤器 在控制器的怎么使用

{{ childrenArray | filter : 'a' }} //匹配属性值中含有a的

在angular的控制器中 应该怎么使用。

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交代的东西太少。过滤器是对值进行处理,不清楚你匹配之后要干什么,仅仅是判断是否匹配?
用法可参考自定义过滤器部分。


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