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Escape a dollar sign in string interpolation
...ht be other cases than the exact one here, and the answer could then help more people
– Martin Hallén
Jan 18 '18 at 11:00
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log4net vs. Nlog
Anyone have experience for both? How do they stack up against each other?
15 Answers
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Why do you program in assembly? [closed]
I have a question for all the hardcore low level hackers out there. I ran across this sentence in a blog. I don't really think the source matters (it's Haack if you really care) because it seems to be a common statement.
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Hash and salt passwords in C#
...was just going through one of DavidHayden's articles on Hashing User Passwords .
14 Answers
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Pandas dataframe get first row of each group
... 4 second
4 5 first
5 6 first
6 7 fourth
To get n first records, you can use head():
>>> df.groupby('id').head(2).reset_index(drop=True)
id value
0 1 first
1 1 second
2 2 first
3 2 second
4 3 first
5 3 third
6 4 second
7 4 fifth
8 ...
How do I compare two DateTime objects in PHP 5.2.8?
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The following seems to confirm that there are comparison operators for the DateTime class:
dev:~# php
<?php
date_default_timezone_set('Europe/London');
$d1 = new DateTime('2008-08-03 14:52:10');
$d2 = new DateTime('2008-01-03 11:11:10');
var_dump($d1 == $d2);
var_dump($d1 > $d2);...
How can I show hidden files (starting with period) in NERDTree?
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Press I (Shift+i) to toggle hidden files in the NERDTree explorer window.
To enable this behavior by default, add this line to your .vimrc file:
let NERDTreeShowHidden=1
For more detail, access the NERDTree help file :help NERD_tree.txt and search for "hidden".
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How to prevent browser page caching in Rails
...er Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 Jan 1990 00...
What is the rationale behind having companion objects in Scala?
Is there a case where a companion object (singleton) for a class is needed? Why would I want to create a class, say Foo and also create a companion object for it?
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Override valueof() and toString() in Java enum
The values in my enum are words that need to have spaces in them, but enums can't have spaces in their values so it's all bunched up. I want to override toString() to add these spaces where I tell it to.
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