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Rails migration for has_and_belongs_to_many join table
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edited Jun 19 '14 at 10:20
answered May 6 '11 at 22:18
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Is there a destructor for Java?
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edited May 23 '17 at 12:02
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answered Oct 5 '08 at 13:17
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How to generate an entity-relationship (ER) diagram using Oracle SQL Developer
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510
Create a diagram for existing database schema or its subset as follows:
Click File → Data M...
OpenJDK availability for Windows OS [closed]
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#1071 - Specified key was too long; max key length is 1000 bytes
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As @Devart says, the total length of your index is too long.
The short answer is that you sho...
“message failed to fetch from registry” while trying to install any module
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Apply CSS Style to child elements
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This code "div.test th, td, caption {padding:40px 100px 40px 50px;}" applies a rule to all th e...
Is there a regular expression to detect a valid regular expression?
... (?: [^\]\\]+ | \\. )* \]
| \( (?:\?[:=!]|\?<[=!]|\?>)? (?1)?? \) # parenthesis, with recursive content
| \(\? (?:R|[+-]?\d+) \) # recursive matching
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(?: (?:[?+*]|\{\d+(?:,\d*)?\}) [?+]? )? # quantifiers
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HashMap get/put complexity
We are used to saying that HashMap get/put operations are O(1). However it depends on the hash implementation. The default object hash is actually the internal address in the JVM heap. Are we sure it is good enough to claim that the get/put are O(1) ?
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How to edit incorrect commit message in Mercurial? [duplicate]
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