// array.join(separator)
var myArray ['foo', 'bar', 'baz'];
myarray.join(':');
// foo:bar:baz
Here is what the above code is Doing:
1. We create an array with three elements.
2. We call the join method on the array, passing in a colon as the separator.
3. The join method returns a string with the elements of the array separated by the separator.
// MULTIPLY FUNCTION const multiply = (num1, num2) => { return num1 * num2; }; let resulMultiply = multiply(4, 5); console.log(resulMultiply); // 20 Here is what the above code is Doing: 1. We create a function called multiply that takes two parameters, num1 and num2. 2. We return the result of num1 multiplied by num2….
nodemon –ignore “*.json” Here is what the above code is Doing: 1. We’re using the nodemon package to run our server. 2. We’re telling nodemon to ignore any changes to files that end in .json. 3. We’re telling nodemon to run the server.js file.
setInterval(function () { console.log(“Every 5 secondes”); }, 5000); console.log(“now”); Here is what the above code is Doing: 1. We’re creating a function that will be called every 5 seconds. 2. We’re passing that function to setInterval. 3. setInterval will call the function every 5 seconds. 4. The function will print “Every 5 seconds” to the…
const str = ‘blah’, len = str.length, space = 4; console.log(str.padStart(len + space, ‘ ‘)); Here is what the above code is Doing: 1. We have a string called str. 2. We get the length of the string and store it in a variable called len. 3. We create a variable called space and set…
// JAVASCRIPT document.getElementById(‘phone’).addEventListener(‘input’, function (e) { var x = e.target.value.replace(/\D/g, ”).match(/(\d{0,3})(\d{0,3})(\d{0,4})/); e.target.value = !x[2] ? x[1] : ‘(‘ + x[1] + ‘) ‘ + x[2] + (x[3] ? ‘-‘ + x[3] : ”); }); // HTML Here is what the above code is Doing: 1. The first line is a regular expression that will match…
const newInput = document.createElement(“input”) newInput.type = “checkbox” Here is what the above code is Doing: 1. We create a new input element 2. We set the type of the input element to “checkbox” 3. We set the value of the input element to the value of the current item in the array 4. We set…