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Best Timer for using in a Windows service
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Press the Enter key to exit the program.
The Elapsed event was raised at 5/20/2007 8:42:27 PM
The Elapsed event was raised at 5/20/2007 8:42:29 PM
The Elapsed event was raised at 5/20/2007 8:42:31 PM
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*/
If you choose System.Threading.Timer, you can use as follows:
using System;
using Syste...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
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15 Answers
15
Active
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How can I use UIColorFromRGB in Swift?
...rn UIColor(
red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
alpha: CGFloat(1.0)
)
}
view.backgroundColor = UIColorFromRGB(0x209624)
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The “unexpected ++” error in jslint [duplicate]
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edited Jul 18 '17 at 17:53
user719662
answered Jun 9 '10 at 4:42
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Functional programming - is immutability expensive? [closed]
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edited Nov 5 '10 at 13:49
answered Nov 5 '10 at 10:45
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Hadoop “Unable to load native-hadoop library for your platform” warning
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answered Nov 15 '13 at 4:12
zhutoulalazhutoulala
4,48222 gold badges1818 silver badges3232 bronze badges
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How do you render primitives as wireframes in OpenGL?
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edited Sep 26 '08 at 3:51
answered Sep 26 '08 at 3:44
Mi...
Check if PHP session has already started
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Recommended way for versions of PHP >= 5.4.0 , PHP 7
if (session_status() == PHP_SESSION_NONE) {
session_start();
}
Reference: http://www.php.net/manual/en/function.session-status.php
For versions of PHP < 5.4.0
if(session_id() == '') {
session_sta...
Pandas DataFrame Groupby two columns and get counts
...y @Andy's answer, you can do following to solve your second question:
In [56]: df.groupby(['col5','col2']).size().reset_index().groupby('col2')[[0]].max()
Out[56]:
0
col2
A 3
B 2
C 1
D 3
share
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Get first key in a (possibly) associative array?
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1354
2019 Update
Starting from PHP 7.3, there is a new built in function called array_key_first() w...