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What does principal end of an association means in 1:1 relationship in Entity framework
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In one-to-one relation one end must be principal and second end must be dependent. Principal end is the one which will be inserted first and which can exist without the dependent one. Dependent end is the one which must be inserted after the principal because it has foreign...
psycopg2: insert multiple rows with one query
...", x) for x in tup)
cur.execute("INSERT INTO table VALUES " + args_str)
and 2 minutes when using this method:
cur.executemany("INSERT INTO table VALUES(%s,%s,%s,%s,%s,%s,%s,%s,%s)", tup)
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Variable length (Dynamic) Arrays in Java
I was wondering how to initialise an integer array such that it's size and values change through out the execution of my program, any suggestions?
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Variable's scope in a switch case [duplicate]
I think I don't understand how the scope works in a switch case.
7 Answers
7
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Most concise way to convert a Set to a List
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... and thereby radically defying the Java code conventions: oracle.com/technetwork/java/javase/documentation/… ! :) :)
– Håvard Geithus
Feb 1 '14 at 0:49
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Network usage top/htop on Linux
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jnettop is another candidate.
edit: it only shows the streams, not the owner processes.
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How to avoid Python/Pandas creating an index in a saved csv?
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There are two ways to handle the situation where we do not want the index to be stored in csv file.
As others have stated you can use index=False while saving your
dataframe to csv file.
df.to_csv('file_name.csv',index=False)
Or you can save...
vim command to restructure/force text to 80 columns
... ). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining lines or deleting/adding text it comes out poorly wrapped.
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ActiveRecord, has_many :through, and Polymorphic Associations
...owever, is there any way to accomplish this these days without source_type and two separate associations?
– Emeka
Feb 27 '16 at 15:27
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linux: kill background task
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There's a special variable for this in bash:
kill $!
$! expands to the PID of the last process executed in the background.
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