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Is it possible to set a number to NaN or infinity?
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The numpy functions also work for numpy arrays and everything that can be converted to one (like lists, tuple, etc.)
There are also functions that explicitly check for positive and negative infinity in NumPy: numpy.isposinf and numpy.isneginf.
Pandas offers two additional functions to check for NaN...
What is Type-safe?
... call it like this:
Sum = AddTwoNumbers(5, "5");
Javascript automaticly converts the 5 to a string, and returns "55". This is due to javascript using the + sign for string concatenation. To make it type-aware, you would need to do something like:
function AddTwoNumbers(a, b)
{
return Number(...
How do DATETIME values work in SQLite?
...ions can chose to store dates and times in any of these formats and freely convert between formats using the built-in date and time functions.
SQLite built-in Date and Time functions can be found here.
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postgresql - sql - count of `true` values
...his works:
SELECT count(*) AS total
, sum(myCol::int) AS countTrue --convert Boolean to Integer
FROM yourTable
;
or better (to avoid :: and use standard SQL syntax):
SELECT count(*) AS total
, sum(CAST(myCol AS int)) AS countTrue --convert Boolean to Integer
FROM yourTable
;
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Creating a ZIP Archive in Memory Using System.IO.Compression
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Thanks! i just added the line of code to convert bytes to zip file
– Elnoor
Sep 20 '17 at 21:30
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Set margins in a LinearLayout programmatically
...ons in Android, they take pixels. I suggest a global utility function that converts dips to px. This is what I have done in all my apps. Android API sucks.
– mxcl
Jan 26 '12 at 12:00
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Selecting/excluding sets of columns in pandas [duplicate]
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You don't really need to convert that into a set:
cols = [col for col in df.columns if col not in ['B', 'D']]
df2 = df[cols]
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Safe integer parsing in Ruby
I have a string, say '123' , and I want to convert it to the integer 123 .
8 Answers
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How to make URL/Phone-clickable UILabel?
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Use UITextView instead of UILabel and it has a property to convert your text to hyperlink.
Objective-C:
yourTextView.editable = NO;
yourTextView.dataDetectorTypes = UIDataDetectorTypeAll;
Swift:
yourTextView.editable = false;
yourTextView.dataDetectorTypes = UIDataDetectorTypes...
Call int() function on every list element?
...int, numbers)
Note: in Python 3.x map returns a map object which you can convert to a list if you want:
numbers = list(map(int, numbers))
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