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Artificially create a connection timeout error
...meout. These errors are very rare (usually when my connection gets dropped by our internal network). How can I generate this kind of effect artificially so I can test our software?
...
What are the differences between -std=c++11 and -std=gnu++11?
...s because I don't recommend doing anything that isn't specifically defined by the Standard... but even then, "violates" is a strange and loaded term, when a lot of these extensions are, to use Standardese, just implementation-defining or specifying things that the Standard is silent on - or perhaps ...
What's default HTML/CSS link color?
...on of IE.
If you are looking for a standardized color scheme that is used by all browsers rather than suggested by HTML5, then there isn't one. Neither is there a way to revert to a browser's default value for a particular property on a particular element using pure CSS. You will have to either use...
RSpec controller testing - blank response.body
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By default, rspec-rails hacks into Rails to prevent it from actually rendering view templates. You should only test the behavior of your actions & filters your controller tests, not the outcome of template rendering — t...
Default initialization of std::array?
...
By definition, default initialization is the initialization that occurs when no other initialization is specified; the C++ language guarantees you that any object for which you do not provide an explicit initializer will be d...
Key existence check in HashMap
...
You won't gain anything by checking that the key exists. This is the code of HashMap:
@Override
public boolean containsKey(Object key) {
Entry<K, V> m = getEntry(key);
return m != null;
}
@Override
public V get(Object key) {
Entr...
Ruby, !! operator (a/k/a the double-bang) [duplicate]
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In most programming languages, including Ruby, ! will return the opposite of the boolean value of the operand. So when you chain two exclamation marks together, it converts the value to a boolean.
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How do I split a string on a delimiter in Bash?
...}"; do
# process "$i"
done
It will parse one line of items separated by ;, pushing it into an array. Stuff for processing whole of $IN, each time one line of input separated by ;:
while IFS=';' read -ra ADDR; do
for i in "${ADDR[@]}"; do
# process "$i"
done
done <&l...
How do I tar a directory of files and folders without including the directory itself?
...e. It works well for hidden files as well. "*" doesn't expand hidden files by path name expansion at least in bash. Below is my experiment:
$ mkdir my_directory
$ touch my_directory/file1
$ touch my_directory/file2
$ touch my_directory/.hiddenfile1
$ touch my_directory/.hiddenfile2
$ cd my_director...
Python argparse: Make at least one argument required
...one)
allow one or two actions to be called (at least one required).
try to by Pythonic (I would rather call it "POSIX"-like)
There are also some implicit requirements when living on command line:
explain the usage to the user in a way which is easy to understand
options shall be optional
allow s...