How to use every function in javascript? Best 5 example of every function in js.

JavaScript every Function - 

Every Function :

The basic use of this function is to get details of record from Array according to some properties. The every function is very helpful with JSON Array. the return type of this function is boolean , either true or false

Syntax:arrayname.every((user define variable name)=>{return condition});

Lets understand this with basic examples :

Q1. how to get status of all employees with gender male ?

    

 var employee_list=[

 {'id':'1','name':'Mukund Singh','gender':'M'},

{'id':'2','name':'Arun','gender':'M'},

{'id':'3','name':'Chanu','gender':'F'},

{'id':'4','name':'Main','gender':F'}

                                    ]

console.log(employee_list.every((v)=>{return v.gender=='M'}));

Here you will result :

false

Q2. how to get status of all products with active status  false ?

var product_list=[

 {'id':'1','name':'Apple','is_active':false},

{'id':'2','name':'Pizza','is_active':false},

{'id':'3','name':'Milk','is_active':false},

{'id':'4','name':'Orange','is_active':false}

                                    ]

console.log(product_list.every((v)=>{return v.is_active}));

Here you will result :

true

Q3. how to get status of  all products with MRP more than 100 ?

var product_list=[

 {'id':'1','name':'Apple','mrp':20},

{'id':'2','name':'Pizza','mrp':11},

{'id':'3','name':'Milk','mrp':20},

{'id':'4','name':'Orange','mrp':-40}

                                    ]

console.log(product_list.every((v)=>{return v.mrp>100}));

Here you will result :

false

Q4. how to get  status of  all products with MRP more than 100 and active status true?

var product_list=[

 {'id':'1','name':'Apple','mrp':20,'is_active':true},

{'id':'2','name':'Pizza','mrp':1001,'is_active':true},

{'id':'3','name':'Milk','mrp':200,'is_active':false},

{'id':'4','name':'Orange','mrp':-40,'is_active':true}

                                    ]

console.log(product_list.every((v)=>{return v.mrp>100 && v.is_active}));

Here you will result :

false

Q5. how to get  status of  all products with MRP more than 100 or active status true?

var product_list=[

 {'id':'1','name':'Apple','mrp':200,'is_active':true},

{'id':'2','name':'Pizza','mrp':1001,'is_active':true},

{'id':'3','name':'Milk','mrp':200,'is_active':true},

{'id':'4','name':'Orange','mrp':140,'is_active':true}

                                    ]

console.log(product_list.every((v)=>{return v.mrp>100 || v.is_active}));

Here you will result :

true

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