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How do I wrap link_to around some html ruby code?
...side a a tag is not valid HTML.
EDIT: Added = character per Amin Ariana's comment below.
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MySQL: Set user variable from result of query
...ts, the assignment operator must be := and not = because = is treated as a comparison operator in non-SET statements.
UPDATE:
Further to comments below, you may also do the following:
SET @user := 123456;
SELECT `group` FROM user LIMIT 1 INTO @group;
SELECT * FROM user WHERE `group` = @group;
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Use of the MANIFEST.MF file in Java
...le is of no purpose.
Most uses of JAR files go beyond simple archiving and compression and require special information to be in the manifest file. Summarized below are brief descriptions of the headers that are required for some special-purpose JAR-file functions
Applications Bundled as JAR Files: ...
How to negate the whole regex?
...r-expressions.info
Lookahead and Lookbehind Zero-Width Assertions
Flavor comparison
See also
How do I convert CamelCase into human-readable names in Java?
Regex for all strings not containing a string?
A regex to match a substring that isn’t followed by a certain other substring.
More exam...
Purging file from Git repo failed, unable to create new backup
... a filter-branch operation. After filter-branch, Git keeps refs to the old commits around, in case something goes wrong.
You can find those in .git/refs/original/…. Either delete that directory and all files within, or use the -f flag to force Git to delete the old references.
git filter-branch...
Python TypeError: not enough arguments for format string
...
Note that the % syntax for formatting strings is becoming outdated. If your version of Python supports it, you should write:
instr = "'{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}'".format(softname, procversion, int(percent), exe, description, company, procurl)
This also ...
How do I determine file encoding in OS X?
...tect the encoding of a file. Read this answer, it explains why.
There's a command line tool, enca, that attempts to guess the encoding. You might want to check it out.
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Set NOW() as Default Value for datetime datatype?
...P,
modification_time DATETIME ON UPDATE CURRENT_TIMESTAMP
)
Or even combine both rules:
modification_time DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
Reference:
http://dev.mysql.com/doc/refman/5.7/en/timestamp-initialization.html
http://optimize-this.blogspot.com/2012/04...
How to print full stack trace in exception?
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