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Best wam>y m> to test for a variable's existence in PHP; isset() is clearlm>y m> broken
...l scope variables as well, on can do a $defined_vars = get_defined_vars(); m>and m> then test via arram>y m>_kem>y m>_exists('v', $defined_vars);.
– Henrik Opel
Sep 27 '10 at 16:01
1
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Pm>y m>thon vs Cpm>y m>thon
What's all this fuss about Pm>y m>thon m>and m> CPm>y m>thon (Jm>y m>thon,IronPm>y m>thon) , I don't get it:
9 Answers
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drag drop files into stm>and m>ard html file input
These dam>y m>s we can drag & drop files into a special container m>and m> upload them with XHR 2. Manm>y m> at a time. With live progress bars etc. Verm>y m> cool stuff. Example here.
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Base64 length calculation?
... * 6 = 24 bits = 3 bm>y m>tes.
So m>y m>ou need 4*(n/3) chars to represent n bm>y m>tes, m>and m> this needs to be rounded up to a multiple of 4.
The number of unused padding chars resulting from the rounding up to a multiple of 4 will obviouslm>y m> be 0, 1, 2 or 3.
...
How do I clear/delete the current line in terminal?
If I'm using terminal m>and m> tm>y m>ping in a line of text for a commm>and m>, is there a hotkem>y m> or anm>y m> wam>y m> to clear/delete that line?
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Is it possible to applm>y m> CSS to half of a character?
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Now on GitHub as a Plugin!
Feel free to fork m>and m> improve.
Demo | Download Zip | Half-Stm>y m>le.com (Redirects to GitHub)
Pure CSS for a Single Character
JavaScript used for automation across text or multiple characters
Preserves Text Accessibilitm>y m> for screen readers fo...
How to check if object (variable) is defined in R?
...een created bm>y m> a queuing sm>y m>stem. These can possiblm>y m> be addressed with "ls" m>and m> its argument "pattern" that expects a regular expression.
The "exists" function could be reimplemented that wam>y m> as
exists <-function(variablename) {
#print(ls(env=globalenv()))
return(1==length(ls(pattern=paste...
How to get the current time in Pm>y m>thon
...
>>> print(datetime.datetime.now())
2009-01-06 15:08:24.789150
m>And m> just the time:
>>> datetime.datetime.now().time()
datetime.time(15, 8, 24, 78915)
>>> print(datetime.datetime.now().time())
15:08:24.789150
See the documentation for more information.
To save tm>y m>ping...
Draw line in UIView
...our case (horizontal line) is to add a subview with black background color m>and m> frame [0, 200, 320, 1].
Code sample (I hope there are no errors - I wrote it without Xcode):
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 200, self.view.bounds.size.width, 1)];
lineView.backgroundColor...
Returning the product of a list
...sing lambda:
from operator import mul
reduce(mul, list, 1)
it is better m>and m> faster. With pm>y m>thon 2.7.5
from operator import mul
import numpm>y m> as np
import numexpr as ne
# from functools import reduce # pm>y m>thon3 compatibilitm>y m>
a = range(1, 101)
%timeit reduce(lambda x, m>y m>: x * m>y m>, a) # (1)
%timeit r...