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When to add what indexes in a table in Rails
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Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will be created automatically, for more inform...
How to change past commit to include a missed file?
... changes." I had already add-ed the missing files, so I did a commit with "xxx" as the message. Then I did the rebase command, and changed the "xxx" commit from "pick" to "edit". Then I did "git rebase --continue". Now when I look at the history I have "xxx" as the latest commit, and the earlier com...
Setting direction for UISwipeGestureRecognizer
...to recognize all four directions, it will return true for sgr.direction == xxx where xxx is any one of the four directions.
Here's an alternative work-around that involves less code (assumes ARC use):
for(int d = UISwipeGestureRecognizerDirectionRight; d <= UISwipeGestureRecognizerDirectionDown...
What Content-Type value should I send for my XML sitemap?
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both are fine.
text/xxx means that in case the program does not understand xxx it makes sense to show the file to the user as plain text. application/xxx means that it is pointless to show it.
Please note that those content-types were originall...
How does UTF-8 “variable-width encoding” work?
...te code point, or a continuation of a multi-byte code point. Like this:
0xxx xxxx A single-byte US-ASCII code (from the first 127 characters)
The multi-byte code-points each start with a few bits that essentially say "hey, you need to also read the next byte (or two, or three) to figure out w...
GetManifestResourceStream returns NULL
...ing my head. I embedded a csharp code file with .txt appended to its name (xxx.cs.txt). For some reason the GetManifestResourceNames() and GetManifestResourceStream() methods won't see a file with .cs in its name.
I renamed it simply xxx.txt and everything was fine.
Weird.
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How do I rename a Git repository?
...ot this error after renaming: $ git status fatal: Not a git repository: C:/xxx/.git/xxx fatal: git status --porcelain failed
– Sawny
Jun 17 '12 at 13:19
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Find the nth occurrence of substring in a string
...that can't match the needle) one-liner:
'foo bar bar bar'.replace('bar', 'XXX', 1).find('bar')
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Rename multiple files based on pattern in Unix
...e the shell
this example in bash shell
for f in fgh*; do mv "$f" "${f/fgh/xxx}";done
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How can I tell if a library was compiled with -g?
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Even for Embedded linux based on kernel 2.6.35, xxx-objdump, xxx-nm works fine.
– agfe2
May 22 '14 at 11:44
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