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SQL Query to concatenate column values from multiple rows in Oracle
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10 Answers
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Active
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Is it fine to have foreign key as primary key?
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134
Foreign keys are almost always "Allow Duplicates," which would make them unsuitable as Primary...
what is faster: in_array or isset? [closed]
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119
The answers so far are spot-on. Using isset in this case is faster because
It uses an O(1) h...
Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...line to your Post model, after specifying has_attached_file :image
Option 1: Validate content type
validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
-OR- another way
validates_attachment :image, content_type: { content_type: ["im...
64-bit version of Boost for 64-bit windows
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answered Feb 24 '10 at 14:01
Adrian ConlonAdrian Conlon
3,92111 gold badge1919 silver badges1717 bronze badges
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Running multiple commands in one line in shell
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edited Apr 26 '14 at 1:06
answered Feb 27 '11 at 1:44
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Rebasing remote branches in Git
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186
It comes down to whether the feature is used by one person or if others are working off of it....
Regex Pattern to Match, Excluding when… / Except between
...swers have some useful ideas but I want something more complete that I can 100% understand and reuse; that's why I set a bounty. Also ideas that work everywhere are better for me than not standard syntax like \K
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What is a 'semantic predicate' in ANTLR?
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170
ANTLR 4
For predicates in ANTLR 4, checkout these stackoverflow Q&A's:
Syntax of semant...
How to disable phone number linking in Mobile Safari?
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edited Apr 6 '18 at 0:17
Scott Hoffman
50066 silver badges1818 bronze badges
answered Oct 22...