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Python function as a function argument?
...ion be an argument
of another function?
Yes.
def myfunc(anotherfunc, extraArgs):
anotherfunc(*extraArgs)
To be more specific ... with various arguments ...
>>> def x(a,b):
... print "param 1 %s param 2 %s"%(a,b)
...
>>> def y(z,t):
... z(*t)
...
>>> y(x...
Getting a list of values from a list of dicts
...> map(lambda d: d['value'], l)
where l is the list.
I see this way "sexiest", but I would do it using the list comprehension.
Update:
In case that 'value' might be missing as a key use:
>>> map(lambda d: d.get('value', 'default value'), l)
Update: I'm also not a big fan of lambdas,...
“No such file or directory” error when executing a binary
I was installing a binary Linux application on Ubuntu 9.10 x86_64. The app shipped with an old version of gzip (1.2.4), that was compiled for a much older kernel:
...
How to set transform origin in SVG
...
To rotate use transform="rotate(deg, cx, cy)", where deg is the degree you want to rotate and (cx, cy) define the centre of rotation.
For scaling/resizing, you have to translate by (-cx, -cy), then scale and then translate back to (cx, cy). You can do this with ...
When to encode space to plus (+) or %20?
...
+ means a space only in application/x-www-form-urlencoded content, such as the query part of a URL:
http://www.example.com/path/foo+bar/path?query+name=query+value
In this URL, the parameter name is query name with a space and the value is query value with a...
Convert integer to hexadecimal and back again
...
// Store integer 182
int intValue = 182;
// Convert integer 182 as a hex in a string variable
string hexValue = intValue.ToString("X");
// Convert the hex string back to the number
int intAgain = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
from http://www.geekpedia.com/KB...
Watermark / hint text / placeholder TextBox
How can I put some text into a TextBox which is removed automatically when user types something in it?
33 Answers
...
git reset --hard HEAD leaves untracked files behind
...
Also -x if you want to remove your .gitignored files and get back to a pristine state.
– jtdubs
Dec 1 '10 at 19:45
...
How to keep environment variables when using sudo
... I use any command with sudo the environment variables are not there. For example after setting HTTP_PROXY the command wget works fine without sudo . However if I type sudo wget it says it can't bypass the proxy setting.
...
Swift variable decorations with “?” (question mark) and “!” (exclamation mark)
... you don't check for nil you'll get a runtime error)
// Cannot be nil
var x: Int = 1
// The type here is not "Int", it's "Optional Int"
var y: Int? = 2
// The type here is "Implicitly Unwrapped Optional Int"
var z: Int! = 3
Usage:
// you can add x and z
x + z == 4
// ...but not x and y, becau...