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Command Line Basics and Useful Tricks With the Terminal

…apple.screencapture type jpg After you press Enter, you will notice that the file type of your screenshots has changed to what you just set it to. You can use any format such as PDF, JPG, and more, but for this example I have used JPG. 2. Stress Test Your Mac…

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React Crash Course for Beginners, Part 2

…apples"></div> <div className="oranges"></div> ); }If you want to return multiple elements then you have to wrap them all up inside a single wrapper element:render() { return ( <div className="fruit"> <div className="apples"></div> <div className="oranges"></div> </div> ); }So make sure that you add the <Header /> component inside the <div className="App"> element…

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How to Create an Audio Oscillator With the Web Audio API

…What You'll Be CreatingThe Web Audio API is a model completely separate from the <audio> tag. It's a JavaScript API for processing and synthesizing audio for the web. The goal of this API is to include capabilities found in modern games and some of the mixing, processing, and filtering tasks…

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Phoenix I18n

…apple", "2 apples", "9000 apples" etc (though "1 ox", "2 oxen"!). Unfortunately, in some other languages like Russian or Polish, the rules are more complex. For example, in the case of apples, you'd say "1 яблоко", "2 яблока", "9000 яблок". But luckily for us, Phoenix has a Gettext.Plural behavior (you…

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Introduction to Popmotion: Pointers and Physics

…Apple's CASpringAnimation, the spring animation behind all that iOS springy playfulness.Import:const { pointer, spring, styler, value } = popmotion;Now, amend stopTracking so that instead of stopping the pointerTracker animation, it starts a spring animation like this:const stopTracking = () => spring({ from: ballXY.get(), velocity: ballXY.getVelocity(), to: 0, stiffness: 100, damping:…

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A Beginner’s Guide to Regular Expressions in JavaScript

…Apples" in a string with "apples". You could simply use theMainString.replace("Apples", "apples"). Nice and easy. Now let's say you have to replace "appLes" with "apples" as well. Similarly, "appLES" should become "apples" too. Basically, all case variations of "Apple" need to be changed to "apple". Passing simple strings as an…

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5 Real-Life Uses for the JavaScript reduce() Method

…Apple', 'Orange', 'Pear', 'Banana'] const occurrences = fruits.reduce((acc, currFruit) => { return {...acc, [currFruit]: (acc[currFruit] || 0) + 1 } }, {}) console.log(occurrences) /* { Apple: 1, Banana: 2, Orange: 2, Pear: 1 } */ Note that at each step of the iteration, the accumulator will be a hash map…

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