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Is it possible to use 'else' in a list comprehension? [duplicate]
..., several expressions can be nested, resulting in more elses and harder to read code:
>>> ["A" if b=="e" else "d" if True else "x" for b in "comprehension"]
['d', 'd', 'd', 'd', 'd', 'A', 'd', 'A', 'd', 'd', 'd', 'd', 'd']
>>>
On a related note, a comprehension can also contain ...
Replace part of a string with another string
... Is this still the only solution in 2018? If so and any C++ committee are reading this, sort it out. It's embarrassing. split(string, string) and replace(string, string) please!
– user997112
Jul 31 '18 at 12:53
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How does one reorder columns in a data frame?
...
@BramVanroy nope, c(1,3,"Var1", 2) will be read as c("1","3","Var1", "2") because vectors can contain data of only one type, so types are promoted to the most general type present. Because there are no columns with the character names "1", "3", etc. you'll get "undefi...
iPhone Safari Web App opens links in new window
... iOS 6.1 and with Bootstrap JS links (i.e dropdown menus etc)
$(document).ready(function(){
if (("standalone" in window.navigator) && window.navigator.standalone) {
// For iOS Apps
$('a').on('click', function(e){
e.preventDefault();
var ne...
Difference between Activity Context and Application Context
...access to different information about the application environment.
If you read the docs at getApplicationContext it notes that you should only use this if you need a context whose lifecycle is separate from the current context. This doesn't apply in either of your examples.
The Activity context pr...
How do I convert a dictionary to a JSON String in C#?
...ring values, you would be better off using a reputable JSON library that already knows how to handle things like escape characters and line breaks. Json.NET is a popular option.
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When do we need curly braces around shell variables?
...without $ and without {}. You have to use
var=10
to assign. In order to read from the variable (in other words, 'expand' the variable), you must use $.
$var # use the variable
${var} # same as above
${var}bar # expand var, and append "bar" too
$varbar # same as ${varbar}, i.e expand a ...
How to create a CPU spike with a bash command
...if=/dev/zero of=/dev/null | dd if=/dev/zero of=/dev/null & }; fulload; read; killall dd
Repeat the command in the curly brackets as many times as the number of threads you want to produce (here 4 threads).
Simple enter hit will stop it (just make sure no other dd is running on this user or yo...
What is the difference between a port and a socket?
...pprehension until Richard Dorman asked the question.
Having done a lot of reading and thinking, I'm now convinced that it would make a lot more sense to have a class TcpConnection with a constructor that takes two arguments, LocalEndpoint and RemoteEndpoint. You could probably support a single argu...
Jquery select all elements that have $jquery.data()
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@gdoron, that's because data()'s getter form does indeed read the HTML5 data- attributes, but its setter form neither creates nor updates them.
– Frédéric Hamidi
Feb 29 '12 at 13:37
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