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Remove unwanted parts from strings in a column
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3 11:00 44
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5 13:00 110
If you need the result converted to an integer, you can use Series.astype,
df['result'] = df['result'].str.replace(r'\D', '').astype(int)
df.dtypes
time object
result int64
dtype: object
If you don't want to modify df in-place, use Dat...
Editing dictionary values in a foreach loop
...t the for loop: it's copying the list of keys. (It would still work if you converted it to a foreach loop.) Solving by using a for loop would mean using colStates.Keys in place of keys.
– idbrii
Mar 27 '19 at 16:26
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Swift - Cast Int into enum:Int
...er has changed. Earlier version of Swift use the class method fromRaw() to convert raw values to enumerated values.
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CharSequence VS String in Java?
...ne such class, a concrete implementation of CharSequence.
You said:
converting from one to another
There is no converting from String.
Every String object is a CharSequence.
Every CharSequence can produce a String. Call CharSequence::toString. If the CharSequence happens to be a String, ...
Efficient way to determine number of digits in an integer
...fectly precise unless specified on the compiler command line. some will be converted to x86 intrinsics at compile time. some don't exist and will expand into formulas of existing intrinsics. for example if using -fpfast you could see usage of SSE instrinsics rather than x87, which yields less guaran...
Flatten an Array of Arrays in Swift
... as it returns a lazy collection instead of a new array, but can always be converted to an array when passed to Array() initialiser like in the example above.
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android pick images from gallery
...ll example for request permission (if need), pick image from gallery, then convert image to bitmap or file
AndroidManifesh.xml
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
Activity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedIns...
How do you compare two version Strings in Java?
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converted on Kotlin stackoverflow.com/a/61795721/6352712
– Serg Burlaka
May 14 at 13:04
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Undefined reference to static class member
...it (1) can be used as an lvalue only if it has been defined but (2) can be converted to an rvalue without being defined?
– j_random_hacker
May 29 '09 at 10:51
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Equation for testing if a point is inside a circle
... x, 2) + Math.Pow(center_y - y, 2))
return D <= radius
that's in C#...convert for use in python...
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