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What is the X-REQUEST-ID http header?
...servers down the line, e.g. web server generates the id and forwards it to application server.
– isapir
Feb 5 '15 at 19:57
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Which, if any, C++ compilers do tail-recursion optimization?
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gcc 4.3.2 completely inlines this function (crappy/trivial atoi() implementation) into main(). Optimization level is -O1. I notice if I play around with it (even changing it from static to extern, the tail recursion goes away pretty fast, so I wouldn't depend on it for...
AngularJS ng-click stopPropagation
...wise calling $event.stopPropagation() was redirecting me to the root of my app when clicking the button.
– Desty
Oct 21 '15 at 16:13
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Detecting that the browser has no mouse and is touch-only
I'm developing a webapp (not a website with pages of interesting text) with a very different interface for touch (your finger hides the screen when you click) and mouse (relies heavily on hover preview).
How can I detect that my user has no mouse to present him the right interface? I plan to leave a...
How can I use redis with Django?
... charged to do so (like on heroku) it doesn't hurt to cache even for small apps.
– vikki
May 15 '13 at 21:11
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When to use dynamic vs. static libraries
....lib , .a ) libraries. What is the difference between them and when is it appropriate to use which?
18 Answers
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A migration to add unique constraint to a combination of columns
What I need is a migration to apply unique constraint to a combination of columns. i.e. for a people table, a combination of first_name , last_Name and Dob should be unique.
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What does “zend_mm_heap corrupted” mean
All of the sudden I've been having problems with my application that I've never had before. I decided to check the Apache's error log, and I found an error message saying "zend_mm_heap corrupted". What does this mean.
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Are soft deletes a good idea? [duplicate]
...take even longer to discover (I worked on one project where this had been happening for years; not many records were ever "deleted", so the totals were close to what was expected and no one noticed).
Finally, a soft delete will work on a table with artificial keys, but potentially won't work on a t...
Unit testing code with a file system dependency
...reated -- and that you don't accidentally overwrite an existing file that happened to have the same filename as a temporary file you were using. Always use relative paths and not absolute paths.
It would also be a good idea to chdir() into a temporary directory before running your test, and chdir(...