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What is the difference between .map, .every, and .forEach?
...ay performing a given action for each item in the Array.
Read about these and the many other Array iteration methods at MDN.
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What is the Objective-C equivalent for “toString()”, for use with NSLog?
... Note if you're using CoreData, the description property is reserved ...and will provide useful debugging information! In that case you'll need to come up with your own unique method name.
– Nuthatch
Dec 7 '13 at 4:09
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grepping using the “|” alternative operator
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@stalinko: you should be able to use the time command to find out.
– Nathan Fellman
Jun 7 '14 at 20:11
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SQL set values of one column equal to values of another column in the same table
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UPDATE YourTable
SET ColumnB=ColumnA
WHERE
ColumnB IS NULL
AND ColumnA IS NOT NULL
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Calculating how many minutes there are between two times
I have a datagridview in my application which holds start and finish times. I want to calculate the number of minutes between these two times. So far I have got:
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Rsync copy directory contents but not directory itself
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Seems weird and inconsistent to make the trailing slash relevant for just this particular command. Wonder why it hasn't been changed.
– Luke Davis
Jan 12 '17 at 22:29
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Connect to a heroku database with pgadmin
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Open the "Properties" of the Heroku server in pgAdminIII and change the "Maintenance DB" value to be the name of the database you want to connect to.
The default setup is suitable for DBAs et al who can connect to any database on the server, but apparently that isn't true in you...
Logging framework incompatibility
I'm building a small Java app and hoping to use logback for logging.
3 Answers
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What is the significance of initializing direction arrays below with given values when developing ch
I am new to competitive programming, and I noticed frequently, many of the great coders have these four lines in their code (particularly in those involving arrays):
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PostgreSQL Connection URL
... answered Dec 21 '13 at 18:37
AndreyAndrey
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