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Bookmark or Share- syntax - What's the meaning of "=>" (an arrow formed from equals ...JavaScript arrow functions are roughly the equivalent of lambda functions in python or blocks in Ruby. These are anonymous functions with their own special syntax and operate in the context of their enclosing scope. This mean they do not have their own "this" but instead access the one from the immediate enclosing function. From the ECMA standard:
- How do you use the ? : (conditional) operator in JavaScript?It's a little hard to google when all you have are symbols ;) The terms to use are "JavaScript conditional operator". If you see any more funny symbols in JavaScript, you should try looking up JavaScript's operators first: Mozilla Developer Center's list of operators. The one exception you're likely to encounter is the $ symbol.
- javascript - Wait 5 seconds before executing next line - Stack OverflowYou can schedule a function of code to run 5 seconds from now, but you have to put the code that you want to run later into a function and the rest of your code after that function will continue to run immediately. For example: function stateChange(newState) {. setTimeout(function(){.
- Which equals operator (== vs ===) should be used in JavaScript ...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 same type === will simply return false. Both are equally quick.
- What does ${} (dollar sign and curly braces) mean in a string in ...Functionally, it looks like it allows you to nest a variable inside a string without doing concatenation using the + operator. I'm looking for documentation on this feature. Example: var string = 'this is a string'; console.log(`Insert a string here: ${string}`); javascript. string. variables. concatenation.
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