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What are 'closures' in .NET?
...thod and the variable j
[CompilerGenerated]
private sealed class <>c__DisplayClass2
{
public <>c__DisplayClass2();
public void <fillFunc>b__0()
{
Console.Write("{0} ", this.j);
}
public int j;
}
for the function:
static void fillFunc(int count) {
...
How to upload a project to Github
...e I wrote this answer, github released a native windows client which makes all the below steps redundant.
You can also use sourcetree to get both git and mercurial setup on Windows.
Here is how you would do it in Windows:
If you don't have git installed, see this article on how to set it up.
O...
App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...hen webview is swiped
WebViewStringChanged(value)
When the JavaScript calls AppInventor.setWebViewString this event is run.
方法
AllowGeolocationAccess(allow,remember)
Method for AllowGeolocationAccess
CanGoBack()
Gets whether this WebView has a back histor...
How to deal with page breaks when printing a large HTML table
...what most people want is running headers and footers, and tables that only allow page breaks between rows, neither of which is implemented in Webkit as of 2015/11/13.
– DoctorDestructo
Nov 13 '15 at 13:12
...
Is it true that one should not use NSLog() on production code?
... line number to make it easier to track down log statements.
#define DEBUG_MODE
#ifdef DEBUG_MODE
#define DebugLog( s, ... ) NSLog( @"<%p %@:(%d)> %@", self, [[NSString stringWithUTF8String:__FILE__] lastPathComponent], __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__] )
#else
...
github: No supported authentication methods available
...d with SSH.
if you ever used Telnet, it's like that (but more secure): it allows you to remotely access the bash shell (command line) of a Linux host.
PuTTY
PuTTY is a free and open-source terminal emulator, serial console and
network file transfer application. It supports several network
protocol...
Check if a number is int or float
...>> if isinstance(x, int):
print 'x is a int!'
x is a int!
_EDIT:_
As pointed out, in case of long integers, the above won't work. So you need to do:
>>> x = 12L
>>> import numbers
>>> isinstance(x, numbers.Integral)
True
>>> isinstance(x, int)
F...
Does PNG contain EXIF data like JPG?
...
Edit: Version 1.5.0 (July 2017) of the Extensions to the PNG 1.2 Specification has finally added an EXIF chunk. It remains to be seen if encoders-decoders begin to support it.
Original: PNG does not embed EXIF info. It allows, however, to embed m...
How to atomically delete keys matching a pattern using Redis
...
Starting with redis 2.6.0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document sa...
How to make a Python script run like a service or daemon in Linux
...ass the Daemon class and override the run() method
"""
def __init__(self, pidfile, stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
self.stdin = stdin
self.stdout = stdout
self.stderr = stderr
self.pidfile = p...