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Is inline assembly language slower than native C++ code?
...times can automatically use some MMX/SIMDx instructions by themselves, and if you don't use them you simply can't compare (other answers already reviewed your assembly code very well).
Just for loops this is a short list of loop optimizations of what is commonly checked for by a compiler (do you thi...
How does free know how much to free?
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When you call malloc(), you specify the amount of memory to allocate. The amount of memory actually used is slightly more than this, and includes extra information that records (at least) how big the block is. You can't (reliably) access that other informat...
Only read selected columns
...ep", "Oct", "Nov", "Dec"), class = "data.frame",
row.names = c(NA, -3L))
If the number of columns is not known beforehand, the utility function count.fields will read through the file and count the number of fields in each line.
## returns a vector equal to the number of lines in the file
count.f...
How to drop unique in MySQL?
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Note that you may not be able to drop a key like this if a foreign key to the email column exists (error 150) . To get this to work, drop the foreign key first, then drop the index, and recreate the foreign key afterwards. e.g ALTER TABLE fuinfo DROP foreign key fk_name_for_em...
How do I access command line arguments in Python?
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Python tutorial explains it:
import sys
print(sys.argv)
More specifically, if you run python example.py one two three:
>>> import sys
>>> print(sys.argv)
['example.py', 'one', 'two', 'three']
sh...
“Conversion to Dalvik format failed with error 1” on external JAR
...erly build it.
In other ways this may be occurred if you accidentally or knowingly edit/ add any thing in the class path file manually .In certain cases we may add android.jar path manually to classpath file for generating java doc.On removing the that after javadoc generated code will works fine.P...
How do I get a raw, compiled SQL query from a SQLAlchemy expression?
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If I understand the OP correctly, he wants the final query. Printing with specifying a dialect (here postgres) still gives me the placeholders instead of the literal values. @Matt's answer does the job. Getting the SQL with p...
SQL Server Escape an Underscore
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oh man! ... if it still doesn't work, make sure you have the column right.
– Jens Frandsen
Sep 17 '18 at 21:54
a...
How to add a WiX custom action that happens only on uninstall (via MSI)?
I would like to modify an MSI installer (created through WiX ) to delete an entire directory on uninstall.
6 Answers
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Error “gnu/stubs-32.h: No such file or directory” while compiling Nachos source code
...ibc - do pacman -S lib32-glibc.
Are you using Ubuntu 12.04? There is a known problem that puts the files in a non standard location. You'll also need to do:
export LIBRARY_PATH=/usr/lib/$(gcc -print-multiarch)
export C_INCLUDE_PATH=/usr/include/$(gcc -print-multiarch)
export CPLUS_INCLUDE_PATH=/...