码迷,mamicode.com
首页 > 其他好文 > 详细

[Ramda] Rewrite if..else with Ramda ifElse

时间:2017-02-27 01:17:28      阅读:228      评论:0      收藏:0      [点我收藏+]

标签:write   console   nbsp   gre   provided   const   click   style   com   

From:

const onSeachClick = (searchTerm) => {
   if(searchTerm !== ‘‘) {
      searchForMovies(searchTerm)
   } else {
       console.log(a search term should be provided)
   }
}

 

To:

// Utils

const inNotEmpty = R.compose(
   R.not, 
   R.isEmpty
);

const onSearchClick = () => {
  R.ifElse(
     isNotEmpty,  // logic to check
     searchForMovices, // do it if true
     log(a search term should be provided) // do it if false
  )
}    

 

Example2:

/*
    Example2:
*/
 function processSearchResponse(response) {
     // check total_results prop from response,
     // it shuold greater than 0
     const searchHasResult = R.compose(
         R.lt(0),
         R.prop(total_results)
     );
     // get results props from response,
     // then createMoviesElements called 
     const createElementFromResults = R.compose(
         createMovicesElements,
         R.prop(results)
     );
     //always return empty 
     const createArrayWithNotFound = R.always([
         createMoviceNotFoundElement({})
     ]);

     const elements = R.ifElse(
         searchHasResult,
         createElementFromResults,
         createArrayWithNotFound
     )(response);
 }  

 

[Ramda] Rewrite if..else with Ramda ifElse

标签:write   console   nbsp   gre   provided   const   click   style   com   

原文地址:http://www.cnblogs.com/Answer1215/p/6464196.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!