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What are the main purposes of using std::forward and which problems it solves?
...ways passed as a normal reference.
#include <iostream>
#include <string>
#include <utility>
void overloaded_function(std::string& param) {
std::cout << "std::string& version" << std::endl;
}
void overloaded_function(std::string&& param) {
std::cout...
How does C compute sin() and other math functions?
...come possible fairly recently. In some cases this can be slow because many extra digits may need to be calculated to ensure correct rounding. In other cases it is extremely quick -- for small enough numbers the answer is just the angle.
– Bruce Dawson
Oct 16 '1...
Is Java's assertEquals method reliable?
I know that == has some issues when comparing two Strings . It seems that String.equals() is a better approach. Well, I'm doing JUnit testing and my inclination is to use assertEquals(str1, str2) . Is this a reliable way to assert two Strings contain the same content? I would use assertTr...
How to ignore xargs commands if stdin input is empty?
... may take advantage of -L <#lines>, -n <#args>, -i, and -I <string>:
ls /empty_dir/ | xargs -n10 chown root # chown executed every 10 args or fewer
ls /empty_dir/ | xargs -L10 chown root # chown executed every 10 lines or fewer
ls /empty_dir/ | xargs -i cp {} {}.bak # every {} is ...
Count rows with not empty value
...u need to add another column, you can almost always solve it by using some extra formulas like containing some concatinate/split/join etc, ill get back to you if i solve it.
– consideRatio
Jan 9 '15 at 23:18
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Evenly distributing n points on a sphere
...wer is closer to the “reason it works” while Martin’s squeaks out an extra bit of precision. So the golden ratio by definition satisfies φ² = φ + 1, which rearranges to φ – 1 = 1/φ, multiplying by 2 π, that leading digit 1 just gets nuked by the trig functions. So in floating point, ju...
UINavigationBar custom back button without title
...ow show whatever you put for initWithTitle, which in this case is an empty string.
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How to store arrays in MySQL?
...u'll want to use JSON_ARRAYAGG, rather than hack the array together from a string.
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curl POST format for CURLOPT_POSTFIELDS
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In case you are sending a string, urlencode() it. Otherwise if array, it should be key=>value paired and the Content-type header is automatically set to multipart/form-data.
Also, you don't have to create extra functions to build the query for you...
How do I right align controls in a StatusStrip?
...lStripLabel to pseudo right align controls by setting the Text property to string.Empty and setting the Spring property to true. This will cause it to fill all of the available space and push all the controls to the right of the ToolStripLabel over.
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