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Fast ceiling of an integer division in C / C++
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For positive numbers
unsigned int x, y, q;
To round up ...
q = (x + y - 1) / y;
or (avoiding overflow in x+y)
q = 1 + ((x - 1) / y); // if x != 0
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Can I write a CSS selector selecting elements NOT having a certain class or attribute?
I would like to write a CSS selector rule that selects all elements that don't have a certain class. For example, given the following HTML:
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How do I know the script file name in a Bash script?
How can I determine the name of the Bash script file inside the script itself?
23 Answers
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Equation (expression) parser with precedence?
I've developed an equation parser using a simple stack algorithm that will handle binary (+, -, |, &, *, /, etc) operators, unary (!) operators, and parenthesis.
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SQL query return data from multiple tables
...ing two or more tables using an inner join (See the wikipedia entry for additional info)
How to use a union query
Left and Right Outer Joins (this stackOverflow answer is excellent to describe types of joins)
Intersect queries (and how to reproduce them if your database doesn't support them) - this ...
Testing two JSON objects for equality ignoring child order in Java
...pports comparing two JSON objects ignoring child order, specifically for unit testing JSON returning from a web service.
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Finding local maxima/minima with Numpy in a 1D numpy array
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edited Nov 12 '15 at 15:14
bobrobbob
1,2001010 silver badges2121 bronze badges
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Refactoring in Vim
...fact that you can refactor on IDEs is priceless for many, I hardly ever do it when I am coding but I may try to do it when editing some one else's source. How do you accomplish such a trivial task across multiple files in Vim?
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Do I need to heartbeat to keep a TCP connection open?
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The connection should remain open regardless but yes it's often common to see protocols implement a heartbeat in order to help detect dead connections, IRC with the PING command for example.
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How to send a stacktrace to log4j?
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try {
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} catch (Exception e) {
log.error( "failed!", e );
}
It's up to log4j to render the stack trace.
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