js ternary
condition ? ifTrue : ifFalsehow to use ternary operator in javascript
function example(…) {
return condition1 ? value1
: condition2 ? value2
: condition3 ? value3
: value4;
}
// Equivalent to:
function example(…) {
if (condition1) { return value1; }
else if (condition2) { return value2; }
else if (condition3) { return value3; }
else { return value4; }
}ternary operator shorthand javascript
let startingNum = startingNum ? otherNum : 1
// can be expressed as
let startingNum = otherNum || 1
// Another scenario not covered here is if you want the value
// to return false when not matched.
//The JavaScript shorthandfor this is:
let startingNum = startingNum ? otherNum : 0
// But it can be expressed as
let startingNum = startingNum && otherNummake shorter if statements with objects
var name_map = {
"#first": "First Name",
"#middle": "Middle Name",
"#last": "Last Name"
}
if (Object.keys(check_map).every(selector => $(selector).val())) {
// Yes, they all have non-blank values
} else {
// No, at least one of them has a blank value (or didn't exist at all)
}javascript shorthand ternary
var startingNumber = startingNumber || 1;Copyright © 2021 Codeinu
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