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How do you delete an ActiveRecord object?
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585
It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)...
What is the syntax for a default constructor for a generic class?
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answered Jun 9 '18 at 19:34
PeerhenryPeerhenry
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Constructors in Go
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138
There are actually two accepted best practices:
Make the zero value of your struct a sensible ...
MySQL CONCAT returns NULL if any field contain NULL
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288
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`a...
Setting individual axis limits with facet_wrap and scales = “free” in ggplot2
...deling efforts using different training parameters. I train the model with 85% of the data, test on the remaining 15%, and repeat this 5 times, collecting actual/predicted values each time. After calculating the residuals, my data.frame looks like this:
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Updating and committing only a file's permissions using git version control
... Dan Anderson
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answered May 9 '12 at 12:45
Vincent B.Vincent B.
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How to format a number 0..9 to display with 2 digits (it's NOT a date)
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beny23beny23
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Including all the jars in a directory within the Java classpath
...d in the Class-Path jar-manifest header.
Note: due to a known bug in java 8, the windows examples must use a backslash preceding entries with a trailing asterisk: https://bugs.openjdk.java.net/browse/JDK-8131329
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What is for Python what 'explode' is for PHP?
... SilentGhostSilentGhost
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Convert array of strings to List
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answered Apr 12 '12 at 18:20
Dmytro ShevchenkoDmytro Shevchenko
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