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How do I put a variable inside a string?
...avefig('hanning(%d).pdf' % num)
The % operator, when following a string, allows you to insert values into that string via format codes (the %d in this case). For more details, see the Python documentation:
https://docs.python.org/3/library/stdtypes.html#printf-style-string-formatting
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Use curly braces to initialize a Set in Python
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There are two obvious issues with the set literal syntax:
my_set = {'foo', 'bar', 'baz'}
It's not available before Python 2.7
There's no way to express an empty set using that syntax (using {} creates an empty dict)
Those may or may not be important to you.
The section of the docs outlin...
How to start an application without waiting in a batch file?
...a guess here, but your start invocation probably looks like this:
start "\Foo\Bar\Path with spaces in it\program.exe"
This will open a new console window, using “\Foo\Bar\Path with spaces in it\program.exe” as its title.
If you use start with something that is (or needs to be) surrounded by ...
Best way to convert strings to symbols in hash
What's the (fastest/cleanest/straightforward) way to convert all keys in a hash from strings to symbols in Ruby?
31 Answers...
Error: free(): invalid next size (fast):
... you have a memory error. You may be trying to free a pointer that wasn't allocated by malloc (or delete an object that wasn't created by new) or you may be trying to free/delete such an object more than once. You may be overflowing a buffer or otherwise writing to memory to which you shouldn't be...
Display name of the current file in vim?
...%m%r%h%w [%Y] [0x%02.2B]%< %F%=%4v,%4l %3p%% of %L"
Which produces:
foo.c [C] [0x23]<code/foo.c 1, 1 2% of 50
Also, as someone mentioned (but now deleted) % will be replaced with the current filename. For example:
:!echo "current file: %"
current file: foo.c
Press ENTER or type c...
How to prevent line break at hyphens on all browsers
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Unlike any other approach, the nobr markup works on all browsers, works even when stylesheets are disabled, and works independently of support to special characters. Is there a real problem with it?
– Jukka K. Korpela
Jan 6 '12 at 22:45
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Please explain the exec() function and its family
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Simplistically, in UNIX, you have the concept of processes and programs. A process is an environment in which a program executes.
The simple idea behind the UNIX "execution model" is that there are two operations you can do.
The first ...
Pass a local file in to URL in Java
...and then lists the host (generally omitted), followed by "/" and the path "foo/bar" (generally meant to be read as an absolute path). Thus "file:///foo/var". An URI that looks like "file:/foo/bar" is incorrect. See also: file URI scheme
– David Tonhofer
Sep 2 '...
How can I fill out a Python string with spaces?
...idth=16,
)
Which results in (you guessed it):
'Hi '
And for all these, you can use python 3.6 f-strings:
message = 'Hi'
fill = ' '
align = '<'
width = 16
f'{message:{fill}{align}{width}}'
And of course the result:
'Hi '
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