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How do you delete an ActiveRecord object?
...like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition: ...
Else clause on Python while statement
... # something went wrong, exit the loop; don't pass go, don't collect 200
break
value = update(value)
else:
# value >= threshold; pass go, collect 200
handle_threshold_reached()
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Package objects
...age object bar {
// package wide constants:
def BarVersionString = "1.0"
// or type aliases
type StringMap[+T] = Map[String,T]
// can be used to emulate a package wide import
// especially useful when wrapping a Java API
type DateTime = org.joda.time.DateTime
type JList[T] = java...
Disable copy constructor
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edited May 10 '18 at 13:56
Joachim W
4,34044 gold badges1919 silver badges4242 bronze badges
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Git : List all unmerged changes in git
...ting them when I don't need them any more, I have now ended up with about 50 branches ;)
3 Answers
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How to rename items in values() in Django?
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered May 15 '12 at 10:45
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Using awk to print all columns from the nth to the last
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will print all but very first column:
awk '{$1=""; print $0}' somefile
will print all but two first columns:
awk '{$1=$2=""; print $0}' somefile
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Why does make think the target is up to date?
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edited May 30 '12 at 6:43
answered Oct 14 '10 at 9:30
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MySQL convert date string to Unix timestamp
...ert DATETIME to UNIX timestamp:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p'))
Here's an example of how to change date format:
SELECT FROM_UNIXTIME(UNIX_TIMESTAMP(STR_TO_DATE('Apr 15 2012 12:00AM', '%M %d %Y %h:%i%p')),'%m-%d-%Y %h:%i:%p')
Documentation: UNIX_TIMESTAMP...
Filter element based on .data() key/value
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+500
your filter would work, but you need to return true on matching objects in the function passed to the filter for it to grab them.
va...