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What's the fuss about Haskell? [closed]
...m. It's strictly typed, but the type inference engine makes it feel like a Python program that magically tells you when you've done a stupid type-related mistake. Haskell's error messages in this regard are somewhat lacking, but as you get more acquainted with the language you'll say to yourself: th...
How to parse XML in Bash?
... called from shell scripts include:
4xpath - command-line wrapper around Python's 4Suite package
XMLStarlet
xpath - command-line wrapper around Perl's XPath library
Xidel - Works with URLs as well as files. Also works with JSON
I also use xmllint and xsltproc with little XSL transform scripts to...
Pandas every nth row
...es a row/column slice, both based on integer position and following normal python syntax.
df.iloc[::5, :]
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Open a buffer as a vertical split in VIM
...
you can use Neovim,like that:
autocmd FileType python nmap <F5> :rightbelow vertical split <bar> :term python %<cr>
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What is an idiomatic way of representing enums in Go?
...atured enum similar to the type you'd see in another language like Java or Python?
A very simple way to create an object that starts to look and feel like a string enum in Python would be:
package main
import (
"fmt"
)
var Colors = newColorRegistry()
func newColorRegistry() *colorRegistry {...
Why is “using namespace std;” considered bad practice?
...
I've always liked Python's "import big_honkin_name as bhn" so you can then just use "bhn.something" rather than "big_honkin_name.something"- really cuts down on the typing. Does C++ have something like that?
– paxdiablo
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Import module from subfolder
...
There's no need to mess with your PYTHONPATH or sys.path here.
To properly use absolute imports in a package you should include the "root" packagename as well, e.g.:
from dirFoo.dirFoo1.foo1 import Foo1
from dirFoo.dirFoo2.foo2 import Foo2
Or you can use ...
Algorithm to generate all possible permutations of a list?
...
Here is an algorithm in Python that works by in place on an array:
def permute(xs, low=0):
if low + 1 >= len(xs):
yield xs
else:
for p in permute(xs, low + 1):
yield p
for i in range(low + 1, l...
Move an item inside a list?
In Python, how do I move an item to a definite index in a list?
5 Answers
5
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Filtering a list based on a list of booleans
...tered_list = [i for (i, v) in zip(list_a, filter) if v]
Using zip is the pythonic way to iterate over multiple sequences in parallel, without needing any indexing. This assumes both sequences have the same length (zip stops after the shortest runs out). Using itertools for such a simple case is a ...