javascript shorthand ternary code example

Example 1: js ternary

condition ? ifTrue : ifFalse

Example 2: 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 && otherNum

Example 3: make 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)
}