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Difference between margin and padding?

What exactly is the difference between margin and padding in CSS? It really doesn't seem to serve much purpose. Could you give me an example of where the differences lie (and why it is important to know the difference)? ...
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Maintain the aspect ratio of a div with CSS

...rce: w3.org, emphasis mine) Padding-bottom values for other aspect ratios and 100% width : aspect ratio | padding-bottom value --------------|---------------------- 16:9 | 56.25% 4:3 | 75% 3:2 | 66.66% 8:5 | 62.5% Placing content in ...
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How can I combine flexbox and vertical scroll in a full-height app?

...xbox. I found what I want using old flexbox layout module ( display: box; and other things) in this link: CSS3 Flexbox full-height app and overflow ...
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How to load images dynamically (or lazily) when users scrolls them into view

I've noticed this in numerous "modern" websites (e.g. facebook and google image search) where the images below the fold load only when user scrolls down the page enough to bring them inside the visible viewport region ( upon view source, the page shows X number of <img> tags but they are not f...
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What's the fastest way to loop through an array in JavaScript?

...dern browsers: https://jsben.ch/wY5fo Currently, the fastest form of loop (and in my opinion the most syntactically obvious). A standard for-loop with length caching var i = 0, len = myArray.length; while (i < len) { // your code i++ } I would say, this is definitely ...
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How to include js file in another js file? [duplicate]

...ude a js file into another js file , so as to stick to the DRY principle and avoid duplication of code. 4 Answers ...
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PHP convert date format dd/mm/yyyy => yyyy-mm-dd [duplicate]

...ate from dd/mm/yyyy => yyyy-mm-dd . I have using the mktime() function and other functions but I cannot seem to make it work. I have managed to explode the original date using '/' as the delimiter but I have no success changing the format and swapping the '/' with a '-' . ...
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Waiting until two async blocks are executed before starting another block

When using GCD, we want to wait until two async blocks are executed and done before moving on to the next steps of execution. What is the best way to do that? ...
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How can I merge properties of two JavaScript objects dynamically?

... ECMAScript 2018 Standard Method You would use object spread: let merged = {...obj1, ...obj2}; merged is now the union of obj1 and obj2. Properties in obj2 will overwrite those in obj1. /** There's no limit to the number of objects you can...
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How can I improve my paw detection?

...ghtly more work. The two animations below show your "Overlapping Paws" and "Grouped Paws" example data. This method seems to be working perfectly. (And for whatever it's worth, this runs much more smoothly than the GIF images below on my machine, so the paw detection algorithm is fairly fast......