Feb 11, 2013 · m, the mapping function – gives you a chance to transform the incoming element before… r , the reducing function – this function combines the accumulator with the result of the mapped element Intuitively, mapReduce creates a new reducer we can plug directly into Array.prototype.reduce .

Jan 12, 2014 · Object.entries takes an object and returns an array of entries, an entry being a [key, value] pair array. Object.fromEntries does the inverse - it takes an array of entries and returns an object where each key ~> value.

The map method will literally 'map' a function call onto each element in the array, take this as a simple example of increasing the value of each integer in an array by 1:

Mar 1, 2024 · @Dominic either way, there's actually a sound technical reason to recommend against the Object.keys method, and that is since the values are not passed to the .map call directly the callback must form a closure over the original object to obtain them, which means it has to be in the same lexical scope.

Don't link your js.map file in your index.html file (no need for that) Minification tools (good ones) add a comment to your .min.js file: //# sourceMappingURL=yourFileName.min.js.map which will connect your .map file. When the min.js and js.map files are ready... Chrome: Open dev-tools, navigate to Sources tab.

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 fitzgen/wu.js did it into my own project. Would love a clear, concise explanation of what I'm missing here. Thanks!

Oct 13, 2014 · I'm trying to use SDF fonts in THREE.js, they come with a PNG map of characters and some character data such as each letters x offset, y offset, width, height and so on. Before I start using the character data with the offsets and widths and things for each character, I just wanted to simply try out mapping only a part of one of the example UV ...

This means that using this mapper with the mapping plugin, every object will be flattened to an object containing only it's name as an observable. You use it like this: var viewModel = ko.mapping.fromJS({id: 1, name: "a", desc: "b"}, mapper); In this case, viewModel will only have a …

Aug 30, 2017 · However, Array.from(map), or using will also return the same thing and can be used here, but someone cannot grantee what it's actually returns until execute it, on the other hand, getting an Iterator and then forming an array is more conventional and readable, however Array.from(map) might be a better solution.

I am not sure why Aleksey Potapov marked the answer for deletion but it did solve my problem. Using Object.keys(subjects).map gave me an array of strings containing the name of each object, while Object.entries(subjects).map gave me an array with all data inside witch it's what I wanted being able to do this: