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How would you count occurrences of a string (actually a char) within a string?
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This is counting characters in a string. The title is about counting strings in a string
– Thomas Weller
Aug 26 '16 at 14:11
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Display help message with python argparse when script is called without any arguments
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If you have arguments that must be specified for the script to run - use the required parameter for ArgumentParser as shown below:-
parser.add_argument('--foo', required=True)
parse_args() will report an error if the script is run without any arguments.
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Is there a version control system for database structure changes?
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In Ruby on Rails, there's a concept of a migration -- a quick script to change the database.
You generate a migration file, which has rules to increase the db version (such as adding a column) and rules to downgrade the version (such as removing a column). Each migration is numbered, a...
How do you count the number of occurrences of a certain substring in a SQL varchar?
...hat answers the question as written in the text, but not as written in the title. To make it work for more than one character, just need to add a / len(searchterm) round the thing. Posted an answer in-case it's useful for someone.
– Andrew Barrett
May 25 '10 a...
How do I pass data between Activities in Android application?
...ION_ID");
The docs for Intents has more information (look at the section titled "Extras").
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Should a Netflix or Twitter-style web service use REST or SOAP? [closed]
...using a web browser as debugging tool for anything other than HTML and javascript. Trust me it sucks. You can only use two of the verbs, the caching is constantly getting in the way, the error handling swallows so much information, it’s constantly looking for a goddamn favicon.ico. Just shoot me.
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How do I load a file into the python console?
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From the man page:
-i When a script is passed as first argument or the -c option is used, enter interactive mode after executing the script or the command. It does not read the $PYTHONSTARTUP file. This can be useful to inspect global variables or a st...
Redirect all output to file [duplicate]
... convenience extension (it originally comes from csh). In a portable shell script (and if you don't need portability, why are you writing a shell script?), use > file 2>&1 only.
– zwol
Aug 10 '13 at 20:50
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Array to Hash Ruby
... Nope. It would return { [1, 2] => [3, 4] }. And since the question's title says "Array to Hash" and the built-in "Hash to Array" method does: { 1 => 2, 3 => 4}.to_a # => [[1, 2], [3, 4]], I thought more than one could end here trying to get the inverse of the built-in "Hash to Array" ...
Call Javascript function from URL/address bar
Is it possible to call a javascript function from the URL? I am basically trying to leverage JS methods in a page I don't have access to the source.
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