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Simple logical operators in Bash
...t works (it would work if all the variables were numbers), but it's not an idiomatic way at all.
(…) parentheses indicate a subshell. What's inside them isn't an expression like in many other languages. It's a list of commands (just like outside parentheses). These commands are executed in a sep...
What is the maximum possible length of a query string?
...o the length of a query string (section 3.2.1). RFC 3986 (Uniform Resource Identifier — URI) also states there is no limit, but indicates the hostname is limited to 255 characters because of DNS limitations (section 2.3.3).
While the specifications do not specify any maximum length, practical lim...
python requests file upload
...g the requests.post, the records are still there indicating that the file did not close.
– Demetris
Oct 11 '19 at 7:06
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C# constructor execution order
...f this should be a comment/answer but for those who learn by example this fiddle illustrates the order as well: https://dotnetfiddle.net/kETPKP
using System;
// order is approximately
/*
1) most derived initializers first.
2) most base constructors first (or top-level in constructor-stack fi...
Detail change after Git pull
...s", i.e. insertions become deletions etc.
– ultracrepidarian
Mar 11 '14 at 16:46
2
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Prepend a level to a pandas MultiIndex
...I think this is a more general solution:
# Convert index to dataframe
old_idx = df.index.to_frame()
# Insert new level at specified location
old_idx.insert(0, 'new_level_name', new_level_values)
# Convert back to MultiIndex
df.index = pandas.MultiIndex.from_frame(old_idx)
Some advantages over t...
Java, Classpath, Classloading => Multiple Versions of the same jar/project
...hem loaded (and all their dependencies) by two different classloaders overriding default behaviour.
A rough example:
ClassLoader loaderA = new MyClassLoader(libPathOne);
ClassLoader loaderB = new MyClassLoader(libPathTwo);
Object1 obj1 = loaderA.loadClass("first.class.binary.name", true...
Golang production web application configuration
...t on runlevel [2345]
stop on runlevel [!2345]
chdir /home/myapp/myapp
setgid myapp
setuid myapp
exec ./myapp start 1>>_logs/stdout.log 2>>_logs/stderr.log
Another aspect is deployment. One option is to deploy by just sending binary file of the program and necessary assets. This is a p...
In Windows Azure: What are web role, worker role and VM role?
...b, worker) are essentially Windows Server. Web and Worker roles are nearly identical:
Web roles are Windows Server VMs with IIS enabled
Worker roles are Windows Server VMs with IIS disabled (and you could manually enable it)
VM roles are Windows Server 2008 images you construct locally via Hyper-V...
Get position of UIView in respect to its superview's superview
...
Frame: (X,Y,width,height).
Hence width and height wont change even wrt the super-super view. You can easily get the X, Y as following.
X = button.frame.origin.x + [button superview].frame.origin.x;
Y = button.frame.origin.y + [button s...