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How to execute a raw update sql with dynamic binding in rails
...ure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a normal update to see what it's doing aside from the actual query.
Using prepared queries can save you a small amount of time in the database, but unless you're doing this a million ti...
Printf width specifier to maintain precision of floating-point value
...guous-ness needs 17 as the precision changes in a binary number (at 2,4,8, etc.) and a decimal number (at 10,100,1000, etc.) are never at the same number (except 1.0). Example: the 2 double values just above 0.1 : 1.000_0000_0000_0000_2e-01, 1.000_0000_0000_0000_3e-01 need 17 digits to distinguish....
How to implement common bash idioms in Python? [closed]
... process status code checking, the various logic commands (if, while, for, etc.) the test command and all of it's relatives. The function definition stuff. This is all much, much easier in Python. This is one of the huge victories in getting rid of bash and doing it in Python.
Interaction featur...
Git Extensions: Win32 error 487: Couldn't reserve space for cygwin's heap, Win32 error 0
...s, corrupted Cygwin's shared memory sections, conflicting versions of DLLs etc.
It's Cygwin code failing to allocate a ~5 MB large chunk of memory for its heap at this fixed address 0x68570000, while only a hole ~2.5 MB large was apparently available there. The relevant code can be seen in msysgit ...
Two-way encryption: I need to store passwords that can be retrieved
...ect against information disclosure vulnerabilities (XSS, remote inclusion, etc). If it gets out, the attacker can eventually crack the encryption (no encryption is 100% un-reversible without the key - As @NullUserException points out this is not entirely true. There are some encryption schemes tha...
Unicode, UTF, ASCII, ANSI format differences
..., you're wrong. (That's just my experience of people posting in newsgroups etc - outside mail, it's really not widely used at all.)
UTF-32: Fixed width encoding using 4 bytes per code point. This isn't very efficient, but makes life easier outside the BMP. I have a .NET Utf32String class as part of ...
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
...and such (lots of non-table 'stuff' is stored in there, undo logs, caches, etc...).
Anyways, I found that if you look in the OS directory where the files-per-table are stored, /var/lib/mysql by default on OSX, /usr/local/var/mysql with homebrew iirc, you'll find an orphaned tablename.ibd file witho...
How to duplicate a git repository? (without forking)
...), I find the easiest approach is to make a new repo with the desired name etc, clone it to your desktop, then just add the files and folders you want in it.
You don't get all the history etc, but you probably don't want that in this case.
...
What's the difference between @Component, @Repository & @Service annotations in Spring?
...th @Controller and it will NOT work with @Component, @Service, @Repository etc...
Note: If a class is already registered as a bean through any alternate method, like through @Bean or through @Component, @Service etc... annotations, then @RequestMapping can be picked if the class is also annotated w...
How to subtract a day from a date?
...=-5)
It can similarly be used with other parameters e.g. seconds, weeks etc
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