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Functional programming - is immutability expensive? [closed]
...nsider this reference implementation in Haskell (I don’t know Scala …) from the Haskell introduction:
qsort [] = []
qsort (x:xs) = qsort lesser ++ [x] ++ qsort greater
where lesser = (filter (< x) xs)
greater = (filter (>= x) xs)
The first disadvantage is the choice ...
How do I Geocode 20 addresses without receiving an OVER_QUERY_LIMIT response?
...
I have stored the lat/long into the DB and retrieving it from DB via AJAX as an array, but it should then passed again to a java script loop, more over i have received 173 locations from DB. Now it shows me the same OVER_QUERY_LIMIT status. Please advice...
– ...
What is the purpose of the '@' symbol in CSS?
...how styles are applied.
Some code examples:
/* Import another stylesheet from within a stylesheet */
@import url(style2.css);
/* Apply this style only for printing */
@media print {
body {
color: #000;
background: #fff;
}
}
/* Embed a custom web font */
@font-face {
f...
What does GitHub for Windows' “sync” do?
... git pull --rebase and then if there are local changes, it does git push.
From here: http://haacked.com/archive/2012/05/21/introducing-github-for-windows.aspx#87318
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...
how do you filter pandas dataframes by multiple columns
... (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male', 'female']:
dic[g]=defaultdict(dict)
for y in [2013, 2014]:
dic[g][y]=df[(df[Gender]==g) & (df[Year]==y)] #store the DataFrames to a dict of dict
EDIT:...
express.js - single routing handler for multiple routes in a single line
...oop(|la|lapoo|lul)/poo'],
function ( request, response ) {
}
);
From inside the request object, with a path of /hooplul/poo?bandle=froo&bandle=pee&bof=blarg:
"route": {
"keys": [
{
"optional": false,
"name": "farcus"
}
],
"cal...
How to send a JSON object using html form data
...
HTML provides no way to generate JSON from form data.
If you really want to handle it from the client, then you would have to resort to using JavaScript to:
gather your data from the form via DOM
organise it in an object or array
generate JSON with JSON.string...
.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...
From JetBrains Intellij Idea inspection:
There are two styles to convert a collection to an array: either using
a pre-sized array (like c.toArray(new String[c.size()])) or
using an empty array (like c.toArray(new Stri...
Remap values in pandas column with a dict
...s doesn't work anymore at all, which isn't surprising given the answer was from 4 years ago. This question needs a new answer given how general the operation is...
– PrestonH
Nov 21 '17 at 17:01
...
Haskell testing workflow
...started a new Haskell project and wanted to set up a good testing workflow from the beginning. It seems like Haskell has a lot of excellent and unique testing tools and many different ways to integrate them.
...