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Difference between \w and \b regular expression meta characters
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+50
The metacharacter \b is an anchor like the caret and the dollar sign. It matches at a position that is called a "word boundary". This ...
Import multiple csv files into pandas and concatenate into one DataFrame
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505
If you have same columns in all your csv files then you can try the code below.
I have added he...
How to draw a line in android
...erride
public void onDraw(Canvas canvas) {
canvas.drawLine(0, 0, 20, 20, paint);
canvas.drawLine(20, 0, 0, 20, paint);
}
}
The activity to start it:
StartDraw.java
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
public class...
Round double in two decimal places in C#?
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answered Mar 1 '10 at 17:53
Alex LEAlex LE
17.1k44 gold badges2626 silver badges2828 bronze badges
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What is the most efficient way to loop through dataframes with pandas? [duplicate]
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10 Answers
10
Active
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How to print a groupby object
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101
Simply do:
grouped_df = df.groupby('A')
for key, item in grouped_df:
print(grouped_df.get...
WPF: Grid with column/row margin/padding?
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answered Aug 28 '09 at 15:50
Thomas LevesqueThomas Levesque
263k5858 gold badges560560 silver badges714714 bronze badges
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How to find all occurrences of an element in a list?
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Sven MarnachSven Marnach
446k100100 gold badges833833 silver badges753753 bronze badges
add...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...ass Dot {
static { Loader.load(); }
static float[] a = new float[50], b = new float[50];
static float dot() {
float sum = 0;
for (int i = 0; i < 50; i++) {
sum += a[i]*b[i];
}
return sum;
}
static native @MemberGetter FloatPointer a...
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