'map' function for objects (instead of arrays) - Stack Overflow
Feb 11, 2013 · 1) map has no meaning without callback 2) if callback isn't function, yours map implementation just runs meaningless for-loop. Also, Object.prototype.hasOwnProperty.call( obj, key …
How can I use JavaScript source maps (.map files)?
The .map files are for JavaScript and CSS (and now TypeScript too) files that have been minified. They are called source maps. When you minify a file, like the angular.js file, it takes thousands of lines of …
javascript - How to use sourcemaps to restore the original file ...
Sep 3, 2015 · Select your *.js file Select the corresponding *.js.map file Browse the non-minified code on the right There might be a lot of noise from webpack:///node_modules/ modules that you're probably …
ecmascript 6 - .map () a Javascript ES6 Map? - Stack Overflow
Jun 27, 2015 · I am aware of wu.js, but I'm running a Babel project and don't want to include Traceur, which it seems like it currently depends on. I also am a bit clueless as to how to extract how …
How do I generate sourcemaps when using babel and webpack?
Jun 16, 2015 · @MelbourneDeveloper, Typically, the file is named *.map, so if your file is main.js, then the sourcemap is called main.js.map. During development with webpack-dev-server, howerver, no …
Using sourceURL and sourceMappingURL with relative paths
In this sample application, I'm trying to use sourceURL to allow many, smaller files to be combined into a single large file but still allow the browser to know what the smaller file should be called, and …
Javascript Object vs Map/Set key lookup performance
Apr 3, 2021 · I was trying to explore how JavaScript Object performs in comparison to Map or Set for normal key accesses. I ran the below 3 codes on JSBEN.CH. Objects const object = {}; for (let i = 0; i …
Using Array objects as key for ES6 Map - Stack Overflow
The original JS map stringifies the key and I am not wanting to do the same type of stringify hack with the new ES6 Map. What can I do to use arrays as keys reliably for a ES6 Map?
How to get distinct values from an array of objects in JavaScript?
Feb 28, 2013 · If it means that instead of "array" being an array of objects, but a "map" of objects with some unique key (i.e. "1,2,3") that would be okay too. I'm just looking for the most performance …
Differences between and when to use Map vs Record
May 31, 2019 · Map is a data class in JS that can use any kind of object as a key, while Record is just a type definition that describes an object, where the keys have to be JS object keys (string, number, or …