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Efficient string concatenation in C++
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Note: "STL" refers to a completely separate open-source library, originally by HP, some part of which were used as a basis for parts of the ISO Standard C++ Library. "std::string", however, was never part of HP's STL, so it's completely wrong to re...
LINQ To Entities does not recognize the method Last. Really?
...me).AsEnumerable()
.Select(p => p.FirstOrDefault());
Ref:
https://www.codeproject.com/Questions/1005274/LINQ-to-Entities-does-not-recognize-the-method-Sys
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Using usort in php with a class private function
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open the manual page http://www.php.net/usort
see that the type for $value_compare_func is callable
click on the linked keyword to reach http://php.net/manual/en/language.types.callable.php
see that the syntax is array($this, 'merchantSort')
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jQuery - What are differences between $(document).ready and $(window).load?
...ment is ready");
});
$(window).load(function() {
// executes when complete page is fully loaded, including all frames, objects and images
console.log("window is loaded");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Que...
How can javascript upload a blob?
...d mean the problem is server-side. In my case, my blob exceeded the http://www.php.net/manual/en/ini.core.php#ini.upload-max-filesize and post_max_size limit in PHP.INI so the file was leaving the front end form but getting rejected by the server. You could either increase this value directly in PHP...
How to show all shared libraries used by executables in Linux?
...ldd to list shared libraries for each executable.
Cleanup the output
Sort, compute counts, sort by count
To find the answer for all executables in the "/bin" directory:
find /bin -type f -perm /a+x -exec ldd {} \; \
| grep so \
| sed -e '/^[^\t]/ d' \
| sed -e 's/\t//' \
| sed -e 's/.*=..//' \
| ...
How to filter SQL results in a has-many-through relation
Assuming I have the tables student , club , and student_club :
13 Answers
13
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Numpy: find first index of value fast
...re is a feature request for this scheduled for Numpy 2.0.0: https://github.com/numpy/numpy/issues/2269
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How to determine whether a Pandas Column contains a particular value
I am trying to determine whether there is an entry in a Pandas column that has a particular value. I tried to do this with if x in df['id'] . I thought this was working, except when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data...
Creating an abstract class in Objective-C
...a class as abstract, just don't use it without subclassing it. There is no compile-time enforcement that prevents instantiation of an abstract class, however. In fact, there is nothing to stop a user from providing implementations of abstract methods via a category (i.e. at runtime). You can force a...