/javascript-helper-functions

javascript-filter-function

javascript-helper-functions

Filter by some keyword in the entire array

var cities = [
    {name: 'Los Angeles', population: '3799621',child: [{id: "child-1"}]},
    {name: 'New York', population: '8175133',child: []},
    {name: 'Old York', population: '1256938',child: [{id: "child-1"}]},
    {name: 'Chicago', population: '2695598',child: [{id: "New York"}]},
    {name: 'Houston', population: '2699451',child: [{id: "child-1"}]},
    {name: 'Philadelphia', population: '1526006',child: [{id: "child-1"}]}
];
cities.filter(city => JSON.stringify(city).toUpperCase().includes('YoR'.toUpperCase()));

Answer

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Get keys from Array and Object

For Array

let myArray = ['a', 'b', 'c'];
let arrayKeys = myArray.keys();
for(const key of arrayKeys) {
  console.log(key);
}

image

For Object

 let myObject = {
   a: 'string1',
   b: 42,
   c: 34
 };

 let myKeys = Object.keys(myObject);
 console.log(myKeys);

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