Current JavaScript From ES6 on you could use template strings: See Kim’s answer below for details. Older answer Try sprintf() for JavaScript. If you really want to do a simple format method on your own, don’t do the replacements successively but do them simultaneously. Because most of the other proposals that are mentioned fail when a replace string … Read more
Javascript has a reverse() method that you can call in an array Not sure if that’s what you mean by ‘libraries you can’t use’, I’m guessing something to do with practice. If that’s the case, you can implement your own version of .reverse() Do note that the built-in .reverse() method operates on the original array, thus you don’t need to … Read more
Use this: Basically, the slice() operation clones the array and returns a reference to a new array. Also note that: For references, strings and numbers (and not the actual object), slice() copies object references into the new array. Both the original and new array refer to the same object. If a referenced object changes, the changes are visible to both … Read more
Move the options part to the Chart creation: Here’s an example from the docs.
If you are interested in finding out whether a variable has been declared regardless of its value, then using the in operator is the safest way to go. Consider this example: But this may not be the intended result for some cases, since the variable or property was declared but just not initialized. Use the in operator for a … Read more
In my case, I was trying to parse an empty JSON: In other words, what happened was the following:
It’s part of the ES6 module system, described here. There is a helpful example in that documentation, also: If a module defines a default export: then you can import that default export by omitting the curly braces: Update: As of June 2015, the module system is defined in §15.2 and the export syntax in particular … Read more
I am getting this error when I run npm start to run my express app. my app.js code my index.js code I am quirte new to using Node and express. I cant see where I have gone wrong. Can anybody see what my problem is?
$.delay is used to delay animations in a queue, not halt execution. Instead of using a while loop, you need to recursively call a method that performs the check every second using setTimeout:
The cleaner way would be to not use .forEach. It’s almost never needed if you’re using TypeScript or a modern version of JavaScript: If the code inside your loop doesn’t have any side-effects and you’re just checking for a condition on each item, you could also use a functional approach with .some: