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Get all unique values in a JavaScript array (remove duplicates)
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new test case jsperf.com/array-filter-unique-vs-new-set/1 seems like new Set's trophy
– shuk
Jan 13 '19 at 18:55
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static linking only some libraries
...ly linking in of a specific library. Example:
# echo "int main() {}" > test.cpp
# c++ test.cpp /usr/lib/libX11.a
# ldd a.out
linux-vdso.so.1 => (0x00007fff385cc000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f9a5b233000)
libm.so.6 => /lib/libm.so.6 (0x00007f9a5afb0000)
libgcc_s....
Delete first character of a string in Javascript
... shows "oobar"
To remove all 0's at the start of the string:
var s = "0000test";
while(s.charAt(0) === '0')
{
s = s.substring(1);
}
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What exactly does the “u” do? “git push -u origin master” vs “git push origin master”
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To see the difference, let's use a new empty branch:
$ git checkout -b test
First, we push without -u:
$ git push origin test
$ git pull
You asked me to pull without telling me which branch you
want to merge with, and 'branch.test.merge' in
your configuration file does not tell me, either. Pl...
Python Progress Bar
...he best points of all the above, and made it into a function, along with a test cases.
To use it, just copy the lines under "def update_progress(progress)" but not the test script. Don't forget to import sys. Call this whenever you need to display or update the progress bar.
This works by directly...
CASCADE DELETE just once
...ascade delete without thinking through all of the repercussions.
I'm still testing out this function, so there may be bugs in it -- but please don't try it if your DB has multi column primary (and thus foreign) keys. Also, the keys all have to be able to be represented in string form, but it could b...
Logic to test that 3 of 4 are True
...u want to use this logic in a programming language, my suggestion is
bool test(bool a, bool b, bool c, bool d){
int n1 = a ? 1 : 0;
int n2 = b ? 1 : 0;
int n3 = c ? 1 : 0;
int n4 = d ? 1 : 0;
return n1 + n2 + n3 + n4 == 3;
}
Or if you want, you can put all of these in a singl...
How does inline Javascript (in HTML) work?
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The best way to answer your question is to see it in action.
<a id="test" onclick="alert('test')"> test </a>
In the js
var test = document.getElementById('test');
console.log( test.onclick );
As you see in the console, if you're using chrome it prints an anonymous function...
Resolving ambiguous overload on function pointer and std::function for a lambda using +
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VS15 gives you this fun error: test.cpp(543): error C2593: 'operator +' is ambiguous t\test.cpp(543): note: could be 'built-in C++ operator+(void (__cdecl *)(void))' t\test.cpp(543): note: or 'built-in C++ operator+(void (__stdcall *)(void))' t\test....
How to test if one java class extends another at runtime?
How to I test if a is a subclass of b ?
3 Answers
3
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