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Are lists thread-safe?
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188
Lists themselves are thread-safe. In CPython the GIL protects against concurrent accesses to t...
How to join two sets in one line without using “|”
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edited Jun 26 '17 at 12:03
Rishabh Agrahari
2,22311 gold badge1616 silver badges1919 bronze badges
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How do I get out of a screen without typing 'exit'?
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631
Ctrl-a d or Ctrl-a Ctrl-d. See the screen manual # Detach.
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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...
Python - abs vs fabs
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127
math.fabs() converts its argument to float if it can (if it can't, it throws an exception). It...
Specifying colClasses in the read.csv
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answered May 10 '10 at 18:36
George DontasGeorge Dontas
26.7k1717 gold badges100100 silver badges138138 bronze badges
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Rails: How to get the model class name based on the controller class name?
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190
This will do it:
class HouseBuyersController < ApplicationController
def index
@mod...
Image loaded event in for ng-src in AngularJS
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185
Here is an example how to call image onload http://jsfiddle.net/2CsfZ/2/
Basic idea is create...
Common MySQL fields and their appropriate data types
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71
Someone's going to post a much better answer than this, but just wanted to make the point that p...
What is Ruby equivalent of Python's `s= “hello, %s. Where is %s?” % (“John”,“Mary”)`
...You can inject little pieces of Ruby code directly into your strings.
name1 = "John"
name2 = "Mary"
"hello, #{name1}. Where is #{name2}?"
You can also do format strings in Ruby.
"hello, %s. Where is %s?" % ["John", "Mary"]
Remember to use square brackets there. Ruby doesn't have tuples, jus...