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How do you know when to use fold-left and when to use fold-right?
...re, you use a left fold. Example (haskell-style pseudocode)
foldl (-) [1, 2, 3] == (1 - 2) - 3 == 1 - 2 - 3 // - is left-associative
If your operator is right-associative (right fold), the parentheses would be set like this:
A x (B x (C x D))
Example: Cons-Operator
foldr (:) [] [1, 2, 3] == 1...
How to set a Timer in Java?
How to set a Timer, say for 2 minutes, to try to connect to a Database then throw exception if there is any issue in connection?
...
python pandas: apply a function with arguments to a series
...w documentation). So now you can do:
my_series.apply(your_function, args=(2,3,4), extra_kw=1)
The positional arguments are added after the element of the series.
For older version of pandas:
The documentation explains this clearly. The apply method accepts a python function which should have ...
What is the maximum float in Python?
...
279
For float have a look at sys.float_info:
>>> import sys
>>> sys.float_info
...
RuntimeWarning: invalid value encountered in divide
... |
edited Jul 5 '17 at 21:45
evadeflow
3,8243030 silver badges3737 bronze badges
answered Apr 16 '14 ...
How to get Scala List from Java List?
...
EDIT: Note that this is deprecated since 2.12.0. Use JavaConverters instead. (comment by @Yaroslav)
Since Scala 2.8 this conversion is now built into the language using:
import scala.collection.JavaConversions._
...
lst.toList.foreach{ node => .... }
works. ...
Can you break from a Groovy “each” closure?
...k.
This example will abort before processing the whole list:
def a = [1, 2, 3, 4, 5, 6, 7]
a.find {
if (it > 5) return true // break
println it // do the stuff that you wanted to before break
return false // keep looping
}
Prints
1
2
3
4
5
but doesn't print 6 or 7.
It's al...
What is the list of possible values for navigator.platform as of today? [closed]
...er is running a browser compiled for 16-bit, even though the user is on a 32-bit or 64-bit Windows machine.
Of course W3Schools lists the old definition (I'm not even gonna link to them). W3 and MDN have agreed on a different definition though:
navigator.platform represents the platform on which th...
How to name variables on the fly?
...
BroVic
61266 silver badges2020 bronze badges
answered Apr 20 '10 at 23:03
ShaneShane
89...