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When should I use mmap for file access?
...ves in the mmap'd region (this is what the MAP_HASSEMAPHORE flag is for).
One place mmap can be awkward is if you need to work with very large files on a 32 bit machine. This is because mmap has to find a contiguous block of addresses in your process's address space that is large enough to fit the...
Delete with Join in MySQL
... this is the best answer because you can even delete from both tables in one action DELETE posts , projects FROM posts INNER JOIN projects ON projects.project_id = posts.project_id WHERE projects.client_id = :client_id
– Developerium
Apr 22 '14 at 9:52
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How does #include work in C++? [duplicate]
...d lead to some hard-to-understand bugs (for a few seconds). For example if one of your variables is named count. But I can't think of a specific confusing error example at the moment...
– Evgeni Sergeev
Apr 5 '16 at 7:45
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What does “1 line adds whitespace errors” mean when applying a patch?
I'm editing some markdown files of a cloned remote repository, and wanted to test creating and applying patches from one branch to another. However, every time I make any change at all, I get the following message during git apply :
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Position of least significant bit that is set
... It's certainly code compact, and the (v & -v) trick is something everyone should learn and remember.
– Adam Davis
Apr 16 '09 at 17:52
2
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I want to delete all bin and obj folders to force all projects to rebuild everything
...rgs rm -rf
find . -iname "obj" | xargs rm -rf
and this can be reduced to one line with an OR:
find . -iname "bin" -o -iname "obj" | xargs rm -rf
Note that if your directories of filenames contain spaces or quotes, find will send those entries as-is, which xargs may split into multiple entries. ...
Presenting a UIAlertController properly on an iPad using iOS 8
...ference to the UIAlertController's UIPopoverPresentationController and set one of the properties as follows:
alertController.popoverPresentationController.barButtonItem = button;
sample code:
UIAlertAction *actionDelete = nil;
UIAlertAction *actionCancel = nil;
// create action sheet
UIAlertCon...
Delete all local changesets and revert to tree
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When the simplest way (a new hg clone) isn't practical, I use hg strip:
% hg outgoing -l 1
% hg strip $rev # replace $rev with the revision number from outgoing
Repeat until hg outgoing stays quiet. Note that hg strip $rev obliterates $rev and all its desc...
How to set NODE_ENV to production/development in OS X
...imilarly to how makefile works. Using it as this example or as you've mentioned to run gulp is a perfectly reasonable use case. For simple tasks I now don't even use gulp and do it all inside the script, it's much faster to get stuff working and I let webpack do the work which used to be done by gul...
Make div stay at bottom of page's content all the time even when there are scrollbars
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@MyHeadHurts - Fair enough, though for my money they're both still basically the same. Content scrolls underneath the fixed footer, when there is enough content to do so. That's good enough for me. Of course, I can see how very large footers like what they have on ...