JS Hint - don't make functions within a loop

Question

I can not get around JSHint's error message. Here is the loop I am using:

for (i = 0; i < Collection.length; i += 4) {     data.push({         items : Collection.slice(i, i + 4).map(function(item) {             return {                 id: item[0],                 title: item[1],             };         })     }); } 

Answer 1

You can just move the function outside the loop and pass a reference to it to map:

function mapCallback(item) {     return {         id : item[0],         title : item[1],     }; } for (i = 0; i < Collection.length; i += 4) {     data.push({         items: Collection.slice(i, i + 4).map(mapCallback)     }); } 

Alternatively, you can use a JSHint directive to ignore function expressions inside loops. Just put this at the top of the file in question:

/*jshint loopfunc: true */