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Using arrays or std::vectors in C++, what's the performance gap?
In our C++ course they suggest not to use C++ arrays on new projects anymore. As far as I know Stroustroup himself suggests not to use arrays. But are there significant performance differences?
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Segmentation fault on large array sizes
...es are only put on the heap with malloc, new, etc.
– Seth Johnson
Dec 4 '09 at 16:05
6
All automa...
ActiveRecord OR query
How do you do an OR query in Rails 3 ActiveRecord. All the examples I find just have AND queries.
14 Answers
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Unlimited Bash History [closed]
...d was, or how some command broke something weeks ago. How do I change this setting?
4 Answers
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Auto layout constraints issue on iOS7 in UITableViewCell
...r the frame of the cell is updated earlier leaving the contentView's frame set to {0, 0, 320, 44} at the time when the constraints are evaluated.
After looking at the contentView in more detail, It appears that autoresizingMasks are no longer being set.
Setting the autoresizingMask before you cons...
How to get nth jQuery element
...li>list item 4</li>
</ul>
We can apply this method to the set of list items:
$( "li" ).eq( 2 ).css( "background-color", "red" );
For more information : .eq()
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Is it better to use std::memcpy() or std::copy() in terms to performance?
...some sort of OS activity going on. I decided to start over.
Same compiler settings and flags. There is only one version of MD5, and it's faster than SHA-2, so I did 3000 loops on a similar set of 5 test strings.
These are my final 10 results:
Time (in seconds) to complete run of MD5 tests
std::c...
How do I make a batch file terminate upon encountering an error?
...is is inside a for it gets a bit tricky. You'll need something more like:
setlocal enabledelayedexpansion
for %%f in (C:\Windows\*) do (
same-executable-over-and-over.exe /with different "parameters"
if !errorlevel! neq 0 exit /b !errorlevel!
)
Edit: You have to check the error after each...
Is there a concise way to iterate over a stream with indices in Java 8?
Is there a concise way to iterate over a stream whilst having access to the index in the stream?
22 Answers
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How do I run a program with commandline arguments using GDB within a Bash script?
...king on your machine (i.e. on Solaris 8), you may start gdb like
gdb -ex "set args <arg 1> <arg 2> ... <arg n>"
And you can combine this with inputting a file to stdin and "running immediatelly":
gdb -ex "set args <arg 1> <arg 2> ... <arg n> < <input fil...