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How to find whether or not a variable is empty in Bash
...g command tests if $var is empty:
if [[ -z "$var" ]]; then
# Do what you want
fi
The command man test is your friend.
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Synchronization vs Lock
java.util.concurrent API provides a class called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
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How can I monitor the thread count of a process on linux?
I would like to monitor the number of threads used by a specific process on Linux.
Is there an easy way to get this information without impacting the performance of the process?
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Unmount the directory which is mounted by sshfs in Mac [closed]
I've installed OSXFUSE in my mac and used sshfs to mount a remote directory. Now I would like to unmount it, but can't find the way.
My OS is OSX 10.8 Mountain.
Can anyone help?
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Checking for a dirty index or untracked files with Git
How can I check if I have any uncommitted changes in my git repository:
14 Answers
14
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Move capture in lambda
How do I capture by move (also known as rvalue reference) in a C++11 lambda?
6 Answers
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Keyboard shortcut to comment lines in Sublime Text 3
In Sublime Text 2 it was possible to comment out a line or a block of lines with Ctrl + / and Ctrl + Shift + / . According to the menu Edit > Comment these shortcuts should be valid, but in Sublime Text 3 (build 3047) they no longer seem to work. Does anybody know the right default keyboard...
date format yyyy-MM-ddTHH:mm:ssZ
I assume this should be pretty simple, but could not get it :(.
In this format Z is time zone.
T is long time pattern
How could I get a date in this format except by using
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What is the best way to ensure only one instance of a Bash script is running? [duplicate]
What is the simplest/best way to ensure only one instance of a given script is running - assuming it's Bash on Linux?
14 An...
PHP - iterate on string characters
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Step 1: convert the string to an array using the str_split function
$array = str_split($your_string);
Step 2: loop through the newly created array
foreach ($array as $char) {
echo $char;
}
You can check the PHP docs for more information: str_split
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