var foo = {
'alpha': 'puffin',
'beta': 'beagle'
};
var keys = Object.keys(foo);
console.log(keys) // ['alpha', 'beta']
// (or maybe some other order, keys are unordered).
Here is what the above code is Doing:
1. We create an object called foo.
2. We call Object.keys(foo) to get an array of the keys in foo.
3. We log the array to the console.
var myArray = [ {name: ‘deepak’, place: ‘bangalore’}, {name: ‘chirag’, place: ‘bangalore’}, {name: ‘alok’, place: ‘berhampur’}, {name: ‘chandan’, place: ‘mumbai’} ]; var toRemove = [ {name: ‘deepak’, place: ‘bangalore’}, {name: ‘alok’, place: ‘berhampur’} ]; myArray = myArray.filter(ar => !toRemove.find(rm => (rm.name === ar.name && ar.place === rm.place) )) Here is what the above code is…
//jQuery 1.6+ use: $(“#inputID”).prop(‘disabled’, true); //disable $(“#inputID”).prop(‘disabled’, false); //enable //jQuery 1.5 and below use: $(“#inputID”).attr(‘disabled’,’disabled’); //disable $(“#inputID”).removeAttr(‘disabled’); //enable Here is what the above code is Doing: 1. When the user clicks the checkbox, the checkbox’s value is assigned to the variable “checked”. 2. If the checkbox is checked, the input field is disabled. 3. If…
$(“input.myclass”).attr(“disabled”, true); Here is what the above code is Doing: 1. When the page loads, the script will disable all the input elements with the class “myclass”. 2. When the user clicks on the button, the script will enable all the input elements with the class “myclass”. 3. When the user clicks on the button…
//makeRequest returns promise using resolve(sucess)/reject(failure) //use .then() the first function passed in will run on sucess, //the second function passed in will run on failure makeRequest(‘GET’,”https://mywebsite.com”).then( function(r){ console.log(“success”); }, function(r){ console.log(“failure”); } ); Here is what the above code is Doing: 1. makeRequest is called with the arguments ‘GET’ and ‘https://mywebsite.com’ 2. makeRequest returns a…
/* character ranges */ regex = /[a-z]/; // matches all lowercase letters regex = /[A-Z]/; // matches all uppercase letters regex = /[e-l]/; // matches lowercase letters e to l (inclusive) regex = /[F-P]/; // matches all uppercase letters F to P (inclusive) regex = /[0-9]/; // matches all digits regex = /[5-9]/; // matches…
// call store.commit(‘authenticate’, { token, expiration, }); // mutation mutations: { authenticate(state, { token, expiration }) { localStorage.setItem(‘token’, token); localStorage.setItem(‘expiration’, expiration); } } Here is what the above code is Doing: 1. We’re calling the authenticate mutation with the token and expiration date. 2. The mutation is setting the token and expiration date in localStorage….