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javascript: recursive anonymous function?
...ctions. Below we'll see two more functions defined using the Y combinator (range and reduce) and a derivative of reduce, map.
const U = f => f (f)
const Y = U (h => f => f (x => U (h) (f) (x)))
const range = Y (f => acc => min => max =>
min > max ? acc : f ([...
numpy: most efficient frequency counts for unique values in an array
...els=[bincount, unique, itemfreq, unique_count, pandas_value_counts],
n_range=[2 ** k for k in range(26)],
logx=True,
logy=True,
xlabel="len(a)",
)
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...
Calculate distance between two points in google maps V3
...ssume that your input data is google.maps.LatLng objects. If you just have raw data like {lat: __, lon: __} then you would instead use p1.lat, for example.
– Don McCurdy
Mar 24 '17 at 20:12
...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
..."""A generator that fakes a read from a file, socket, etc."""
for i in range(4):
yield '<< %s' % i
def reader_wrapper(g):
# Manually iterate over data produced by reader
for v in g:
yield v
wrap = reader_wrapper(reader())
for i in wrap:
print(i)
# Result
<...
Convert Data URI to File then append to FormData
...ataURItoBlob(dataURI) {
// convert base64/URLEncoded data component to raw binary data held in a string
var byteString;
if (dataURI.split(',')[0].indexOf('base64') >= 0)
byteString = atob(dataURI.split(',')[1]);
else
byteString = unescape(dataURI.split(',')[1]);
...
The definitive guide to form-based website authentication [closed]
...accounts.
The form “account@domain” is concise and supported by a wide range of protocols and URI schemes. Such an identifier is, of course, most universally recognized as an email address.
Email providers are already the de-facto primary identity providers online. Current password reset flows u...
How to calculate the number of days between two dates? [duplicate]
...
Warning: not all days are 24 hours long. If your date range spans a daylight saving change, you'll lose or gain an hour (typically). Use Math.round() on the result (avoid floor or ceil).
– Mark
Sep 20 '11 at 2:33
...
Configure WAMP server to send email
...e Message (great for HTML emails), Headers, Body (to inspect the HTML) and Raw (full unparsed email).
It also has a Sections view, to split up the different media types found in the email.
It has a super clean and friendly UI, a good log viewer and gives you notifications when you receive an email...
What's the purpose of SQL keyword “AS”?
...the SQL Standard, is inappropriate. The underlying concept is that of a ‘range variable’.
UPDATE 3: I just re-read what Celko wrote and he is wrong: the table is not being renamed! I now think:
A correlation name is more often called an alias, but I will be formal. In Standard SQL they ca...
Asynchronous method call in Python?
...ss pool must be created inside __main__.
async.pool = Pool(4)
p = range(0, 1000)
results = []
for i in range(4):
result = printsum(i, sample(p, 100))
results.append(result)
for result in results:
print("Worker %i: sum value is %i" % result.get())
In a ...