我想遍历Immutable List,我用List.map来做到这一点,它可以工作,但效果不好.有没有更好的办法?因为我只检查数组中的每个元素,所以如果该元素符合我的规则,我会做某些事情,就像Array.forEach一样,我不想返回任何Array.map这样的东西.
I would like to loop through Immutable List, I used List.map to do it, it can be worked, but not good. is there are a better way? Because I just check each element in array, if the element match my rule, I do something, just like Array.forEach, I don't want to return anything like Array.map.
例如,这是我现在的工作:
for example, it is my work now:
let currentTheme = ''; let selectLayout = 'Layout1'; let layouts = List([{ name: 'Layout1', currentTheme: 'theme1' },{ name: 'Layout2', currentTheme: 'theme2' }]) layouts.map((layout) => { if(layout.get('name') === selectLayout){ currentTheme = layout.get('currentTheme'); } });推荐答案
Immutable.js列表中存在方法List.forEach.
The method List.forEach exists for Immutable.js lists.
但是,一种更实用的方法将使用方法List.find如下:
However, a more functional approach would be using the method List.find as follows:
let selectLayoutName = 'Layout1'; let layouts = List([Map({ name: 'Layout1', currentTheme: 'theme1' }),Map({ name: 'Layout2', currentTheme: 'theme2' })]) selectLayout = layouts.find(layout => layout.get('name') === selectLayoutName); currentTheme = selectLayout.get('currentTheme')然后您的代码没有副作用.
Then your code doesn't have side-effects.
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