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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
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Edit: This is a more complete version that shows more differences between [ (aka test) and [[.
The following table shows that whether a variable is quoted or not, whether you use single or double brackets and whether the variable co...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL?
9 Answers
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Why is std::map implemented as a red-black tree?
Why is std::map implemented as a red-black tree ?
6 Answers
6
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What's wrong with using $_REQUEST[]?
...ve to check that it's submitted by the POST method. But the way to do that is to check $_SERVER['REQUEST_METHOD'] explicitly, not rely on $_POST being empty for a GET. And anyway if the method is POST, you still might want to take some query parameters out of the URL.
No, the problem with $_REQUES...
What is a deadlock?
...at the same time.
One process loses out and must wait for the other to finish.
A deadlock occurs when the waiting process is still holding on to another resource that the first needs before it can finish.
So, an example:
Resource A and resource B are used by process X and process Y
X starts to...
Why does std::getline() skip input after a formatted extraction?
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Why does this happen?
This has little to do with the input you provided yourself but rather with the default behavior std::getline() exhibits. When you provided your input for the name (std::cin >> name), you not only submitted th...
What are bitwise shift (bit-shift) operators and how do they work?
...ef) introduction to the different shift operators.
The Operators
>> is the arithmetic (or signed) right shift operator.
>>> is the logical (or unsigned) right shift operator.
<< is the left shift operator, and meets the needs of both logical and arithmetic shifts.
All of thes...
jQuery - What are differences between $(document).ready and $(window).load?
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$(document).ready(function() {
// executes when HTML-Document is loaded and DOM is ready
console.log("document is ready");
});
$(window).load(function() {
// executes when complete page is fully loaded, including all frames, objects and images
console.log("window is loade...
Difference between Git and GitHub
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Git is a revision control system, a tool to manage your source code history.
GitHub is a hosting service for Git repositories.
So they are not the same thing: Git is the tool, GitHub is the service for projects that use Git.
T...
Which sort algorithm works best on mostly sorted data? [closed]
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edited Nov 11 '10 at 16:12
Dominic Rodger
87.2k282...