JAVASCRIPT

ternary operator js

? called ternary operator is shorcut for, "if statement".
// below we make object with key id, and assign it a value from body.id.
// if body.id is null it will return false and we assign it res.id.
{ id: body.id? body.id : res.id }
// we can write it in if statement like this
if(body.id){
 return {id:body.id}
}else{
  return {id:res.id}
}

javascript ternary

condition ? doThisIfTrue : doThisIfFalse

1 > 2 ? console.log(true) : console.log(false)
// returns false

js ternary

condition ? ifTrue : ifFalse

ternary operator js

condition ? exprIfTrue : exprIfFalse
////////////////////////////////////
//Example 
const age = 26;
				 //set the bevarage conditionally depending on the age 
const beverage = age >= 21 ? "You can have a Beer" : "Stick to Juice Kid";
console.log(beverage); //OUTPUT: "You can have a Beer"

//Same as 
//if(age>=21){
//bevrage="You can have a Beer"}

//else{
//bevrage = "Stick to Juice Kid"}

javascript ternary operator

//ternary operator syntax and usage:
condition ? doThisIfTrue : doThisIfFalse

//Simple example:
let num1 = 1;
let num2 = 2;
num1 < num2 ? console.log("True") : console.log("False");
// => "True"

//Reverse it with greater than ( > ):
num1 > num2 ? console.log("True") : console.log("False");
// => "False"

ternary function javascript

var variable;
if (condition)
  variable = "something";
else
  variable = "something else";

//is the same as:

var variable = condition ? "something" : "something else";

javascript ternary

## Conditional (ternary) operator
#1 one condition
condition ? ifTrue : ifFalse;
#2 Multi conditions
condition1 ? value1
         : condition2 ? value2
         : condition3 ? value3
         : value4;

javascript ternary operator

let showme || "if the variable showme has nothing inside show this string";
let string = condition ? 'true' : 'false'; // if condition is more than one enclose in brackets
let condition && 'show this string if condition is true';

ternary operator in javascript

let amount = 50;
let food = amount > 100 ? 'buy coka-cola' : 'buy just a water bottle';
console.log(food)

ternary operator javascript

condition? True Statement : False Statement

ternary operator javascript

// ternary operator in javascript
const x = 6;
let answer = x > 10 ? "greater than 10" : "less than 10";
console.log(answer);
// output: less than 10

// nested condition
const answer = x > 10 ? "greater than 10" : x < 5 ? "less than 5" : "between 5 and 10";
console.log(answer);
// output: between 5 and 10

// Syntax
condition ? ifTrue : ifFalse

javascript js ternary operater

<script>  
    function gfg() {  
     //JavaScript to illustrate 
    //Conditional operator 
  
    let PMarks = 40 
    let result = (PMarks > 39)? 
        "Pass":"Fail"; //Syntax:- (condition) ? do this if true : do this if false
  
    document.write(result); 
    }  
    gfg();  
</script>

ternary operator javascript

// Write your function here:

const lifePhase = (age) => {
  return age < 0 || age > 140 ? 'This is not a valid age':
   age < 3  ? 'baby':
   age < 13 ? 'child':
   age < 20 ? 'teen':
   age < 65 ? 'adult':'senior citizen';
}




 console.log(lifePhase(5)) 

javascript ternary

// example:
age >= 18 ? `wine` : `water`;

// syntax:
// <expression> ? <value-if-true> : <value-if-false>

ternary operator js

condition ? expression1 : expression2 
// Will return expression1 if condition = true and expression2 if condition != true

ternary operator nodejs

var variable1 = typeof variable1  !== 'undefined' ?  variable1  : default_value;

javascript ternary operator

// condition ? expr1 : expr2

// example:

let bar = 2
let foo = 0
let result;

result = bar > foo ? 1 : -1; // result = 2 > 0 ? 1 (true) : -1 (false);

// output: result = 1 

javascript ternary operator syntax

variable = Expression1 ? Expression2 : Expression3

syntax of ternary operator in javascript

( condition ) ? run this code : run this code instead

ternary javascript

let a = -2 
let b = -4 
let c = 1
let d = 0
let e = 10 
let ans = a>b?
    	  a>c?
    	 a>d?'yes1':'no1'
		:b>c? 'yes2' : 'no2':
		e> b? 'mas malaki' : 'maliit daw'
		c>d?'yes3': 'no3'
console.log(ans)

ternary operator in javascript

//if there is complex statement use if statement 
//otherwise ternary operator will be best to use.
condition ? true Condition : false Condition
9<10 ? "small":"bigger" // small code run

Ternary Expressions in JavaScript

let memberType = 'basic';
let price = memberType === 'basic' ? 5 : 10;

In the example, the condition that is evaluated is whether memberType === 'basic'. 
If this condition is true, then price will be 5, and otherwise it will be 10. 
The equivalent long-hand conditional expression would be:

let memberType = 'basic';
let price;

if (memberType === 'basic') {
  price = 5;
} else {
  price = 10;
}

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

javascript shorthand ternary

var startingNumber = startingNumber || 1;

ternary javascript

let x = x>10 ? 
    			x>10 ? 
    				x>23 ? '' 
					:x>2? '' : 'asd'
    			: '' 
		: x>23 ? '' : '123'

ternary operator javascript

function fee(isMember)
{
return isMember==true?"$20":"$100"
}

console.log(fee(true))

/*a==b?c:d*/
/*the syntax is check if a equals b, if so, return c otherwise return d*/
/*1==1?4:10: check if 1 equals 1, if so, return 4 otherwise return 10*/

ternary operators js

;var eatsPlants = false
;var eatsAnimals = true
;var category = eatsPlants? (eatsAnimals? "omnivore" : "herbivore" ) : (eatsAnimals? "carnivore" : "undefined")

;console.log(category)

ternary operator in javascript

FullName: (obj.FirstName && obj.LastName) ? obj.FirstName + " " + obj.LastName : "missing values",

ternary javascript

let a,b,c,d = [(3>1),(2>2),(4>2),(19>22),(19>22)] 

let ans = a?
   			b?
    		   a==d?'yes1' : 'no1'
			 :c==a?
    			d? 'malaki si b' : 'maliit lang daw'
			 : 'eto ung sagot 8787'
			:d==b? 'yes3' : 'no3'

console.log(ans)