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Add single element to array in numpy
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This command does not alter the a array. However, it returns a new modified array. So, if a modification is required then a = numpy.append(a,a[0]) must be used.
– Amjad
Oct 16 '17 at 15:24
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Launching Spring application Address already in use
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Spring Boot uses embedded Tomcat by default, but it handles it differently without using tomcat-maven-plugin. To change the port use --server.port parameter for example:
java -jar target/gs-serving-web-content-0.1.0.jar --server.port=8181
Update. Alternatively put server.por...
How to run code when a class is subclassed? [duplicate]
...bases, clsdict)
where in this case, name equals the string 'Superclass', and bases is the tuple (object, ). The clsdict is a dictionary of the class attributes defined in the body of the class definition.
Note the similarity to myclass = type(name, bases, clsdict).
So, just as you would use a cl...
How to create function that returns nothing
...ite a function with pl/pgsql .
I'm using PostgresEnterprise Manager v3 and using shell to make a function, but in the shell I must define return type. If I don't define the return type, I'm not able to create a function.
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Temporarily switch working copy to a specific Git commit
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If you are at a certain branch mybranch, just go ahead and git checkout commit_hash. Then you can return to your branch by git checkout mybranch. I had the same game bisecting a bug today :) Also, you should know about git bisect.
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Can Flask have optional URL parameters?
...d, username):
pass
But I guess that you want to write a single route and mark username as optional? If that's the case, I don't think it's possible.
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Object initialization syntax
I'm just starting out with F# and I can't find the syntax to do object initialization like in C# 3.
3 Answers
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Add file extension to files with bash
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This works great with the rename included in Ubuntu (and so I'm guessing all Debian based distros), much less verbose than jm666's answer.
– Roger Heathcote
Jun 10 '12 at 10:59
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Check if a table exists in Rails
...came explicit regarding tables/views, collectively data sources.
# Tables and views
ActiveRecord::Base.connection.data_sources
ActiveRecord::Base.connection.data_source_exists? 'kittens'
# Tables
ActiveRecord::Base.connection.tables
ActiveRecord::Base.connection.table_exists? 'kittens'
# Views
Ac...
Circular gradient in android
...ying to make a gradient that emits from the middle of the screen in white, and turns to black as it moves toward the edges of the screen.
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