javascript - Wait until processing completes before exporting Node.js module? -


i'm loading configuration object, remapping properties in for..in loop below (it string concatenation on values of .styles array of strings). when i'm requiring module, re-mapping hasn't occurred. i'm guessing sort of async issue, i'm not sure how handle it. suggestions?

// init vars var buildconfig = require('./build-config.js'); var csspath = buildconfig.paths.csspath; var bundle = buildconfig.bundle;  // callbacks var setpathsgeneric = function(basepath, extname) { // currying function     return function(val, index, self) {         return basepath + val + extname;     }; }; var setcsspaths = setpathsgeneric(csspath, '.css');  // map key values actual url paths (var key in bundle) {     if(bundle[key].styles && bundle[key].styles.length) {         bundle[key].styles.map(setcsspaths);     }  }  module.exports = {     bundle: bundle };

when i'm requiring module, re-mapping hasn't occurred. i'm guessing sort of async issue, i'm not sure how handle it.

your code 100% synchronous, node executes "re-mapping" code synchronously before exporting bundle object.

i think, problem array.prototype.map() not modify array, returns new array instead. so, should assign new value bundle[key].styles yourself:

bundle[key].styles = bundle[key].styles.map(setcsspaths);

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