EDIT (Jun 5 2019): While the idea that “TypeScript supports Map natively” is still true, since version 2.1 TypeScript supports something called Record. Unfortunately the first generic parameter (key type) is still not fully respected: even with a string type, something like peopleA[0] (a number) is still valid. EDIT (Apr 25 2016): The answer below is old and should not be considered the best answer. … Read more
How do I clean information in a form after submit so that it does not show this error after a page refresh? See image (from chrome): The dialog has the text: The page that you’re looking for usedinformation that you entered. Returning to thatpage might cause any action you took to berepeated. Do you want … Read more
Actually, invites are not for the server, but for the channel. Each channel in your server has it’s own Instant Invite link, and which ever channel you pull the link from is where the user will land on your server each time they try to access it. For example, if you send Glados an invite link … Read more
For custom-delimited date formats, you have to pull out the date (or time) components from a DateTimeFormat object (which is part of the ECMAScript Internationalization API), and then manually create a string with the delimiters you want. To do this, you can use DateTimeFormat#formatToParts. You could destructure the array, but that is not ideal, as the array output depends … Read more
Use the Array.prototype.push method to append values to the end of an array: Run code snippet You can use the push() function to append more than one value to an array in a single call: Run code snippet Update If you want to add the items of one array to another array, you can use firstArray.concat(secondArray): Run code snippet Update … Read more
Use JavaScript objects as associative arrays. Associative Array: In simple words associative arrays use Strings instead of Integer numbers as index. Create an object with JavaScript allows you to add properties to objects by using the following syntax: An alternate syntax for the same is: If you can, also create key-to-value object maps with the following … Read more
This is an old post, but I thought I should provide an illustrated answer anyway. Use javascript’s object notation. Like so: And to access the values: or you can use javascript literal object notation, whereby the keys not require to be in quotes:
For example: To generate 8 unique random numbers and store them to an array, you can simply do this:
The strict equality operator (===) behaves identically to the abstract equality operator (==) except no type conversion is done, and the types must be the same to be considered equal. Reference: Javascript Tutorial: Comparison Operators The == operator will compare for equality after doing any necessary type conversions. The === operator will not do the conversion, so if two values are not the … Read more
This is a one-line shorthand for an if-else statement. It’s called the conditional operator.1 Here is an example of code that could be shortened with the conditional operator: This can be shortened with the ?: like so: Like all expressions, the conditional operator can also be used as a standalone statement with side-effects, though this is unusual outside of … Read more