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Lambda function in list comprehensions
... calls it ten times.
The second one doesn't call the function. It creates 10 different lambda functions. It puts all of those in a list. To make it equivalent to the first you need:
[(lambda x: x*x)(x) for x in range(10)]
Or better yet:
[x*x for x in range(10)]
...
Finding the direction of scrolling in a UIScrollView?
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answered Nov 1 '10 at 21:04
memmonsmemmons
38.7k2121 gold badges142142 silver badges179179 bronze badges
...
Java Regex Capturing Groups
...ier. You're using a greedy quantifier in your first group (index 1 - index 0 represents the whole Pattern), which means it'll match as much as it can (and since it's any character, it'll match as many characters as there are in order to fulfill the condition for the next groups).
In short, your 1s...
How to count TRUE values in a logical vector
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answered Feb 3 '10 at 12:29
MarekMarek
43.9k1313 gold badges8484 silver badges114114 bronze badges
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What makes Lisp macros so special?
...le syntax for a common case. The line
divisibleByTwo = [x for x in range(10) if x % 2 == 0]
yields a list containing all even numbers between 0 and 9. Back in the Python 1.5 days there was no such syntax; you'd use something more like this:
divisibleByTwo = []
for x in range( 10 ):
if x % 2 ...
Plot smooth line with PyPlot
...o smooth out your data yourself:
from scipy.interpolate import spline
# 300 represents number of points to make between T.min and T.max
xnew = np.linspace(T.min(), T.max(), 300)
power_smooth = spline(T, power, xnew)
plt.plot(xnew,power_smooth)
plt.show()
spline is deprecated in scipy 0....
Install MySQL on Ubuntu without a password prompt
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stefansundin
1,50711 gold badge1313 silver badges1919 bronze badges
answered Oct 12 '11 at 13:08
Dimitre RadoulovDimi...
PHP memory profiling
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10
Xdebug reimplemented memory tracing in 2.6 (2018-01-29) which can be used in Qcachegrind or simi...
Set padding for UITextField with UITextBorderStyleNone
... you want:
UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 20)];
textField.leftView = paddingView;
textField.leftViewMode = UITextFieldViewModeAlways;
Worked like a charm for me!
In Swift 3/ Swift 4, it can be done by doing that
let paddingView: UIView = UIView(frame: CG...
Reference: Comparing PHP's print and echo
...e should one wish to use print in a conditional expression. Why 1 and not 100? Well in PHP the truthiness of 1 or 100 is the same, i.e. true, whereas 0 in a boolean context equates as a false value. In PHP all non-zero values (positive and negative) are truthy values and this derives from PHP's Per...