Javascript - Web development basic Series: The Array forEach Method
In this video, we'll see exactly how the JavaScript Array forEach method works, and you'll be able to write it on your own in just a few minutes!
Code walkthrough (javascript):
‹// forEach method example›
‹const colors = ['red', 'green', 'blue'];›
‹const fruits = ['apple', 'banana', 'cherry'];›
‹Array.prototype.forEach.call([1, 2, 3], function(value) {›
‹print(value); // This is a print statement (not shown in real browsers)›
‹});›
‹Array.prototype.forEach.call(fruits, function(value) {›
‹console.log('Fruit:', value); // This is a console.log statement (not shown in real browsers)›
‹});›
‹Array.prototype.forEach.call(colors, function(value) {›
‹console.log('Color:', value); // This is a console.log statement (not shown in real browsers)›
‹});›
What it looks like: Array Iteration Error: 'undefined' is not defined → Array Elements Processed Correctly: [1, 2, 3]
Try it yourself: Try changing the callback function to return a new value.
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