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How to remove unused C/C++ symbols with GCC and ld?
...the code into separate sections within the translation unit. This will be done for functions, classes, and external variables by using the following two compiler flags:
-fdata-sections -ffunction-sections
Link the translation units together using the linker optimization flag (this causes the link...
Java Reflection Performance
...5 // using reflection
Bear in mind the lookup and the instantiation are done together, and in some cases the lookup can be refactored away, but this is just a basic example.
Even if you just instantiate, you still get a performance hit:
30 // no reflection
47 // reflection using one lookup, only...
How big can a MySQL database get before performance starts to degrade
...
The database size does matter. If you have more than one table with more than a million records, then performance starts indeed to degrade. The number of records does of course affect the performance: MySQL can be slow with large tables. If you hit one million records you will ...
How can I see what I am about to push with git?
...hat will be pushed. I don't care what each commit has individually because one commit could be completely negated by the next.
– cmcculloh
Sep 3 '10 at 15:45
1
...
How can I open multiple files using “with open” in Python?
I want to change a couple of files at one time, iff I can write to all of them. I'm wondering if I somehow can combine the multiple open calls with the with statement:
...
Laravel redirect back to original destination after login
...direct the user back to the intended page
// or defaultpage if there isn't one
if (Auth::attempt(['email' => $email, 'password' => $password])) {
return redirect()->intended('defaultpage');
}
For Laravel 4 (old answer)
At the time of this answer there was no official support from the...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...es
z.update(y) # modifies z with y's keys and values & returns None
return z
and now:
z = merge_two_dicts(x, y)
In Python 3.9.0a4 or greater (final release date approx October 2020): PEP-584, discussed here, was implemented to further simplify this:
z = x | y # NOTE: 3.9+ ...
Find out whether radio button is checked with JQuery?
...Is there a way to do this without clicking?
– Keith Donegan
Feb 16 '10 at 11:50
3
This doesn't so...
Why do python lists have pop() but not push()
Does anyone know why Python's list.append function is not called list.push given that there's already a list.pop that removes and returns the last element (that indexed at -1) and list.append semantic is consistent with that use?
...
Determine the number of lines within a text file
...ore efficient was regarding memory usage, not necessarily speed. The first one loads the entire contents of the file into an array which means it must allocate at least as much memory as the size of the file. The second merely loops one line at a time so it never has to allocate more than one line's...