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How do I build a numpy array from a generator?
...
130
Numpy arrays require their length to be set explicitly at creation time, unlike python lists. Th...
Return first match of Ruby regex
...Name[/regular expression/]. This is an example output from irb:
irb(main):003:0> names = "erik kalle johan anders erik kalle johan anders"
=> "erik kalle johan anders erik kalle johan anders"
irb(main):004:0> names[/kalle/]
=> "kalle"
...
Programmatically create a UIView with color gradient
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702
Objective-C:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
CAGradie...
Comparing two CGRects
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250
Use this:
if (CGRectEqualToRect(self.view.frame, rect)) {
// do some stuff
}
...
What is the “__v” field in Mongoose
...|
edited Dec 14 '16 at 11:04
Pierre
16k44 gold badges3737 silver badges6161 bronze badges
answered Sep 1...
How to calculate time in hours between two dates in iOS
...enDates = [date1 timeIntervalSinceDate:date2];
double secondsInAnHour = 3600;
NSInteger hoursBetweenDates = distanceBetweenDates / secondsInAnHour;
See, the apple reference library http://developer.apple.com/library/mac/navigation/
or if you are using Xcode just select help/documentation from th...
get list of pandas dataframe columns based on data type
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320
If you want a list of columns of a certain type, you can use groupby:
>>> df = pd.Data...
Convert number strings with commas in pandas DataFrame to float
...e step.
You need to set the locale first:
In [ 9]: import locale
In [10]: from locale import atof
In [11]: locale.setlocale(locale.LC_NUMERIC, '')
Out[11]: 'en_GB.UTF-8'
In [12]: df.applymap(atof)
Out[12]:
0 1
0 1200 4200.00
1 7000 -0.03
2 5 0.00
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How to subtract 2 hours from user's local time?
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answered Feb 9 '11 at 9:40
BrunoLMBrunoLM
84.4k7373 gold badges266266 silver badges420420 bronze badges
...
How to append multiple values to a list in Python
... 3, 4]
>>> lst.extend([5, 6, 7])
>>> lst.extend((8, 9, 10))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> lst.extend(range(11, 14))
>>> lst
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
So you can use list.append() to append a single value, and list.exten...