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How to write the Fibonacci Sequence?
...urning the Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 should = only those numbers between 1 & 20), I have written for the program to display all Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 displays = First 20 Fibonacci numbers). I thought I had a sure-f...
How assignment works with Python list slice?
...two distinct operation that use very similar syntax:
1) slicing:
b = a[0:2]
This makes a copy of the slice of a and assigns it to b.
2) slice assignment:
a[0:2] = b
This replaces the slice of a with the contents of b.
Although the syntax is similar (I imagine by design!), these are two diff...
Jackson serialization: ignore empty values (or null)
I'm currently using jackson 2.1.4 and I'm having some trouble ignoring fields when I'm converting an object to a JSON string.
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Python data structure sort list alphabetically
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241
[] denotes a list, () denotes a tuple and {} denotes a dictionary. You should take a look at t...
What do all of Scala's symbolic operators mean?
...to look for them. Or, failing that, look at the index (presently broken on 2.9.1, but available on nightly).
Every Scala code has three automatic imports:
// Not necessarily in this order
import _root_.java.lang._ // _root_ denotes an absolute path
import _root_.scala._
import _root_.scala.Pr...
How do I get the color from a hexadecimal color code using .NET?
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answered Jan 21 '10 at 14:32
ThorarinThorarin
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how to check the dtype of a column in python pandas
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127
You can access the data-type of a column with dtype:
for y in agg.columns:
if(agg[y].dtype...
What are “connecting characters” in Java identifiers?
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270
Here is a list of connecting characters. These are characters used to connect words.
http://w...
How do you calculate log base 2 in Java for integers?
I use the following function to calculate log base 2 for integers:
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