How to convert an Object {} to an Array [] of key-value pairs in JavaScript
You can use Object.keys() and map() to do this
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Does parseDouble exist in JavaScript?
It’s not possible to natively deal with a 21-digit precision number in JavaScript. JavaScript only has one kind of number: “number”, which is a IEEE-754 Double Precision (“double”) value. As such, parseFloat in JavaScript is the equivalent of a “parse double” in other languages. However, a number/”double” only provides 16 significant digits (decimal) of precision and so reading in a number with 21-digits will lose the 5 … Read more
How does the data-toggle attribute work? (What’s its API?)
I think you are a bit confused on the purpose of custom data attributes. From the w3 spec Custom data attributes are intended to store custom data private to the page or application, for which there are no more appropriate attributes or elements. By itself an attribute of data-toggle=value is basically a key-value pair, in which the key … Read more
How to generate a simple popup using jQuery
First the CSS – tweak this however you like: And the JavaScript: And finally the html: Here is a jsfiddle demo and implementation. Depending on the situation you may want to load the popup content via an ajax call. It’s best to avoid this if possible as it may give the user a more significant … Read more
Angular ForEach in Angular4/Typescript?
in angular4 foreach like that. try this.
Module not found can’t resolve
Posted as answer so that it can be marked as answered, from comment: Your import path is wrong, it looks like you should change import test from ‘./app/test.js’; to import test from ‘./test.js’;
keep getting “? Something is already running on port 3000” when I do npm start on react app
Open cmd and write this netstat -a -o -n You will get list of active connections then find 3000 by hitting Cntrl + f Copy the PID of that port and hit this command taskkill /F /PID PID_of_port Edit This guide is for windows.
What is “assert” in JavaScript?
There is no standard assert in JavaScript itself. Perhaps you’re using some library that provides one; for instance, if you’re using Node.js, perhaps you’re using the assertion module. (Browsers and other environments that offer a console implementing the Console API provide console.assert.) The usual meaning of an assert function is to throw an error if the expression passed into the function is false; … Read more
ReferenceError: Invalid left-hand side in assignment
You have to use == to compare (or even ===, if you want to compare types). A single = is for assignment.
How can I remove a character from a string using JavaScript?
I am so close to getting this, but it just isn’t right. All I would like to do is remove the character r from a string. The problem is, there is more than one instance of r in the string. However, it is always the character at index 4 (so the 5th character). Example string: crt/r2002_2 What I want: crt/2002_2 This … Read more