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Ant task to run an Ant target only if a file exists?
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cmcgintycmcginty
96.3k3333 gold badges144144 silver badges150150 bronze badges
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Run a callback only if an attribute has changed in Rails
...y is here: https://github.com/rails/rails/commit/16ae3db5a5c6a08383b974ae6c96faac5b4a3c81
Here is a blog post on these changes: https://www.ombulabs.com/blog/rails/upgrades/active-record-5-1-api-changes.html
Here is the summary I made for myself on the changes to ActiveRecord::Dirty in Rails 5.1+:...
How does Google's Page Speed lossless image compression work?
...ames like:
nice_picture.jpg
into
nice_picture_fff5e6456e6338ee09457ead96ccb696.jpg
I discovered that this seems to be a common complaint. Since I didn't want to rename all my pictures by hand, I used Adobe Bridge's Rename tool along with a Regular Expression. You could use other rename comm...
How large should my recv buffer be when calling recv in the socket library
...perform fragmentation). For UDP you are always save if you use a buffer of 64 KB, since no IP packet (v4 or v6) can be above 64 KB in size (not even when fragmented) and this even includes the headers IIRC, so data will always be below 64 KB for sure.
– Mecki
D...
How do I capture the output of a script if it is being ran by the task scheduler?
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84
Try this as the command string in Task Scheduler:
cmd /c yourscript.cmd > logall.txt
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NSUserDefaults removeObjectForKey vs. setObject:nil
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SeanSean
2,09622 gold badges1313 silver badges2424 bronze badges
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Copy a file in a sane, safe and efficient way
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64
With C++17 the standard way to copy a file will be including the <filesystem> header and ...
Why is the use of alloca() not considered good practice?
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96
Interesting. But wouldn't that qualify as a compiler bug? After all, the inlining changed the behaviour of the code (it delayed the freeing...
How to convert latitude or longitude to meters?
...t your coordinates onto it. The model I typically see used for this is WGS 84. This is what GPS devices usually use to solve the exact same problem.
NOAA has some software you can download to help with this on their website.
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How do I analyze a program's core dump file with GDB when it has command-line parameters?
...2'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000564583cf2759 in myfunc (i=3) at main.c:7
7 *(int*)(NULL) = i; /* line 7 */
(gdb) bt
#0 0x0000564583cf2759 in myfunc (i=3) at main.c:7
#1 0x0000564583cf2858 in main (argc=3, argv=0x7ffcca4effa8) at main.c:2
So not...