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Why is 'false' used after this simple addEventListener function?
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According to MDN Web Docs, the third parameter is:
useCapture
If true, useCapture indicat...
How can I get sin, cos, and tan to use degrees instead of radians?
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218
You can use a function like this to do the conversion:
function toDegrees (angle) {
return a...
How to install psycopg2 with “pip” on Python?
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Blocks on Swift (animateWithDuration:animations:completion:)
...es:
UIView.animateWithDuration(0.2, animations: {
self.blurBg.alpha = 1
}, completion: {
(value: Bool) in
self.blurBg.hidden = true
})
The important part here is the (value: Bool) in. That tells the compiler that this closure takes a Bool labeled 'value' and returns void.
For referen...
How do I execute a string containing Python code in Python?
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14 Answers
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How do I view events fired on an element in Chrome DevTools?
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Hit F12 to open Dev Tools
Click the Sources tab
On right-hand side, scroll down to "Event Listener Breakpoints", and expand tree
Click on the events you want to listen for.
Interact with the target element, if they fire you will...
Simulating group_concat MySQL function in Microsoft SQL Server 2005?
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11 Answers
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Double Iteration in List Comprehension
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10 Answers
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How to check if a value exists in an array in Ruby
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1974
You're looking for include?:
>> ['Cat', 'Dog', 'Bird'].include? 'Dog'
=> true
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How do I fetch lines before/after the grep result in bash?
...n use the -B and -A to print lines before and after the match.
grep -i -B 10 'error' data
Will print the 10 lines before the match, including the matching line itself.
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