what if the key is a number? Your, LOL.. i just used this one spontaneously (of course didn't work) before I ended up here, I believe _.merge is now _.extend(destination, others). That’s the same, because Object.fromEntries expects an iterable object as the argument. rev 2020.9.23.37661, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide. Using Javascript Maps. Syntax: map1.delete(k); Parameters: k - Key which is to be deleted from the map Returns: true if the value is found and deleted from the map otherwise, it returns false Map.prototype.clear() – Removes all the elements from the Map object Syntax: However both of LoDash and Underscore libraries do provide many additional convenient functions when working with Objects and Arrays in general. maybe this isn't a good solution, I seem to be getting errors in jquery1.9: You should not extend Object.prototype; this breaks the "object-as-hashtables" feature of JavaScript (and subsequently a lot of libraries such as the Google Maps JS API). Would suggest one more solution: Just pass the key and values to the function and you will get a map object. Swapping out our Syntax Highlighter. The part between (and including) the braces is the object literal. Don't forgot to transpile this syntax to syntax which is supported by all browsers because it is relatively new. Not necessarily an array. Use Object.entries(obj) to get an array of key/value pairs from obj. What are parts of speech of the words in this sentence? Does my toilet drain poorly because of bad venting? In that article he is adding object properties to an array object, but these are not really part of the 'array'. And it also allows recursive adds/modifications with $.extend(true,object1,object2);: A short and elegant way in next Javascript specification (candidate stage 3) is: A deeper discussion can be found in Object spread vs Object.assign and on Dr. Axel Rauschmayers site. In case you have multiple anonymous Object literals inside an Object and want to add another Object containing key/value pairs, do this: [Object { name="Spiderman", value="11"}, Object { name="Marsipulami", Note that Object.assign() triggers setters whereas spread syntax doesn’t. What forced me to write this guide on creating JavaScript key value array pairs, were some comments I received in other Js tutorials. 3.
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