javascript array functions

1//create an array like so:
2var colors = ["red","blue","green"];
3
4//you can loop through an array like this:
5for (var i = 0; i < colors.length; i++) {
6    console.log(colors[i]);
7}

1const printResult = (a, b) => {
2    return a + b;
3}
4console.log(printResult(5, 8));
5//Expected output: 13

1concat(arr1,[...]) // Joins two or more arrays, and returns a copy of the joined arrays
2copyWithin(target,[start],[end]) // Copies array elements within the array, to and from specified positions
3entries() // Returns a key/value pair Array Iteration Object
4every(function(currentval,[index],[arr]),[thisVal]) // Checks if every element in an array pass a test
5fill(val,[start],[end]) // Fill the elements in an array with a static value
6filter(function(currentval,[index],[arr]),[thisVal]) //	Creates a new array with every element in an array that pass a test
7find(function(currentval,[index],[arr]),[thisVal]) // Returns the value of the first element in an array that pass a test
8findIndex(function(currentval,[index],[arr]),[thisVal]) // Returns the index of the first element in an array that pass a test
9forEach(function(currentval,[index],[arr]),[thisVal]) // Calls a function for each array element
10from(obj,[mapFunc],[thisVal]) // Creates an array from an object
11includes(element,[start]) // Check if an array contains the specified element
12indexOf(element,[start]) // Search the array for an element and returns its position
13isArray(obj) // Checks whether an object is an array
14join([seperator]) // Joins all elements of an array into a string
15keys() // Returns a Array Iteration Object, containing the keys of the original array
16lastIndexOf(element,[start]) // Search the array for an element, starting at the end, and returns its position
17map(function(currentval,[index],[arr]),[thisVal]) // Creates a new array with the result of calling a function for each array element
18pop() // Removes the last element of an array, and returns that element
19push(item1,[...]) // Adds new elements to the end of an array, and returns the new length
20reduce(function(total,currentval,[index],[arr]),[initVal]) // Reduce the values of an array to a single value (going left-to-right)
21reduceRight(function(total,currentval,[index],[arr]),[initVal]) // Reduce the values of an array to a single value (going right-to-left)
22reverse() // Reverses the order of the elements in an array
23shift() // Removes the first element of an array, and returns that element
24slice([start],[end]) // Selects a part of an array, and returns the new array
25some(function(currentval,[index],[arr]),[thisVal]) // Checks if any of the elements in an array pass a test
26sort([compareFunc]) // Sorts the elements of an array
27splice(index,[quantity],[item1,...]) // Adds/Removes elements from an array
28toString() // Converts an array to a string, and returns the result
29unshift(item1,...) // Adds new elements to the beginning of an array, and returns the new length
30valueOf() // Returns the primitive value of an array

1let fruits = ['Apple', 'Banana']
2
3console.log(fruits.length)
4// 2
5

1var colors = [ "red", "orange", "yellow", "green", "blue" ]; //Array
2
3console.log(colors); //Should give the whole array
4console.log(colors[0]); //should say "red"
5console.log(colors[1]); //should say "orange"
6console.log(colors[4]); //should say "blue"
7
8colors[4] = "dark blue" //changes "blue" value to "dark blue"
9console.log(colors[4]); //should say "dark blue"
10//I hope this helped :)

1var familly = []; //no familly :(
2var familly = new Array() // uncommon
3var familly = [Talel, Wafa, Eline, True, 4];
4console.log(familly[0]) //Talel
5familly[0] + "<3" + familly[1] //Talel <3 Wafa
6familly[3] = "Amir"; //New coming member in the family