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Naming of ID columns in database tables
... be copying the join syntax (don't tell me that no one ever does this!)and forget to change the alias in the join condition.
So you now have
select t1.field1, t2.field2, t3.field3
from table1 t1
join table2 t2 on t1.id = t2.table1id
join table3 t3 on t1.id = t3.table2id
when you meant
select ...
Git Extensions: Win32 error 487: Couldn't reserve space for cygwin's heap, Win32 error 0
...ctions are persistent, often a system reboot is needed to clear them out before the problem can be resolved.
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How to check for an active Internet connection on iOS or macOS?
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Important: This check should always be performed asynchronously. The majority of answers below are synchronous so be careful otherwise you'll freeze up your app.
Swift
1) Install via CocoaPods or Carthage: https://github.com/ashleymills/Reachability.swift
2) Tes...
FFmpeg: How to split video efficiently?
...ference.
The two command version should be quicker by adding another -ss before the input file for the a 'fast seek' followed by the more accurate slow seek.
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How to create duplicate allowed attributes
...llowMultiple = false)]
public abstract class Attribute : _Attribute
Therefore, as others have noted, all subclasses are limited in the same way, and should you require multiple instances of the same attribute, you need to explicitly set AllowMultiple to true:
[AttributeUsage(..., AllowMultiple = ...
Drawable image on a canvas
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How does one use an animation-list (multiple frames) for animation with the canvas approach?
– RichieHH
Jul 27 '14 at 14:53
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Is an index needed for a primary key in SQLite?
...as a primary key in an SQLite table, should an index be explicitly created for it as well? SQLite does not appear to automatically create an index for a primary key column, but perhaps it indexes it anyway, given its purpose? (I will be searching on that column all the time).
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How to force IntelliJ IDEA to reload dependencies from build.sbt after they changed?
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You can force SBT to reload changes:
Open SBT toolwindow (on the right side of IDE) and press refresh button.
If you use auto-import feature you need to save your file to force auto-refresh.
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Shortcut to exit scale mode in VirtualBox [closed]
...j_ I hope they never fix it, I've been riding the karma from this question for 5 years.
– Mike Miller
Jun 9 '17 at 14:58
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join list of lists in python [duplicate]
Is the a short syntax for joining a list of lists into a single list( or iterator) in python?
15 Answers
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