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REST APIs: custom HTTP headers vs URL parameters
...terize access to the resource. This especially comes into play with posts and searches: /orders/find?q=blahblah&sort=foo. There's a fine line between parameters and sub-resources: /orders/view/client/23/active versus /orders/view/client/23?show=active. I recommend the sub-resource style and...
Display date/time in user's locale format and time offset
I want the server to always serve dates in UTC in the HTML, and have JavaScript on the client site convert it to the user's local timezone.
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Debug vs. Release performance
...ly true. In debug mode, the compiler emits debug symbols for all variables and compiles the code as is. In release mode, some optimizations are included:
unused variables do not get compiled at all
some loop variables are taken out of the loop by the compiler if they are proven to be invariants
cod...
Extracting bits with a single multiplication
I saw an interesting technique used in an answer to another question , and would like to understand it a little better.
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“The breakpoint will not currently be hit. The source code is different from the original version.”
...n debugging in Visual Studio, sometimes I add a breakpoint but it's hollow and VS says "The breakpoint will not currently be hit. The source code is different from the original version." Obviously this prevents me from being able to debug.
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Set environment variables from file of key/value pairs
...your approach is the export in the while loop is happening in a sub shell, and those variable will not be available in current shell (parent shell of while loop).
Add export command in the file itself:
export MINIENTREGA_FECHALIMITE="2011-03-31"
export MINIENTREGA_FICHEROS="informe.txt programa.c"...
SQL UPDATE all values in a field with appended string CONCAT not working
...ut the column had a limited set of characters it would accept, changed it, and now the query works fine.
– Fresheyeball
Nov 9 '10 at 3:19
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rake db:schema:load vs. migrations
Very simple question here - if migrations can get slow and cumbersome as an app gets more complex and if we have the much cleaner rake db:schema:load to call instead, why do migrations exist at all?
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How to avoid isset() and empty()
I have several older applications that throw a lot of "xyz is undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
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Undo git pull, how to bring repos to old state
...do the merge step, but probably not the fetch (doesn't make a lot of sense and shouldn't be necessary).
To undo the merge, use git reset --hard to reset the local repository to a previous state; use git-reflog to find the SHA-1 of the previous state and then reset to it.
Warning
The commands li...