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How to determine if Javascript array contains an object with an attribute that equals a given value?
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No need to reinvent the wheel loop, at least not explicitly (using arrow functions, modern browsers only):
if (vendors.filter(e => e.Name === 'Magenic').length > 0) {
/* vendors contains the element we're looking for */
}
or, better yet:
if (vendors.so...
Want to find records with no associated records in Rails
...on.includes(:friends).where("friends.person_id IS NULL")
Or that have at least one friend
Person.includes(:friends).where("friends.person_id IS NOT NULL")
You can do this with Arel by setting up scopes on Friend
class Friend
belongs_to :person
scope :to_somebody, ->{ where arel_table[...
How to search for a part of a word with ElasticSearch
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@JimC I haven’t used ElasticSearch for at least 7 years, so I don’t know the current changes of the project.
– roka
May 11 at 4:45
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Margin on child element moves parent element
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This is normal behaviour (among browser implementations at least). Margin does not affect the child's position in relation to its parent, unless the parent has padding, in which case most browsers will then add the child's margin to the parent's padding.
To get the behaviour you wan...
Managing relationships in Laravel, adhering to the repository pattern
...a non-sql data source).
ORMS
The trickiest part of this setup, for me at least, is determing if Eloquent is actually helping or harming us. ORMs are a tricky subject, because while they help us greatly from a practical point of view, they also couple your "business logic entities" code with the co...
Check if a string is null or empty in XSLT
... The detailed semantics of this test is: return true if there is at least one categoryName element whose string value is an empty string.
– jelovirt
May 11 '09 at 6:08
14
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Common MySQL fields and their appropriate data types
... US phone number is too big to be stored as an unsigned int, it must be at least a bigint.
5 Answers
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Rails: update_attribute vs update_attributes
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Your statement about callbacks is incorrect, at least in Rails 3. It says very plainly in the comments in the source that "Callbacks are invoked".
– Batkins
Jan 29 '13 at 20:39
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Explicit vs implicit SQL joins
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Performance wise, they are exactly the same (at least in SQL Server).
PS: Be aware that the IMPLICIT OUTER JOIN syntax is deprecated since SQL Server 2005. (The IMPLICIT INNER JOIN syntax as used in the question is still supported)
Deprecation of "Old Style" JOIN Syntax:...
WAMP shows error 'MSVCR100.dll' is missing when install
... 64bit windows runs 64 and 32 bit code. You will probably find you need at least one of the 32bit runtimes for some app/utility you will install at some point.
UPDATE
If you are running WAMPServer 2.5 you also need the VC11 redist. Visual C++ Redistributable for Visual Studio 2012
29.08.2014 wi...