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Is MATLAB OOP slow or am I doing something wrong?
...re reference-counted, because they use copy-on-write and shared underlying raw data.
– Andrew Janke
Apr 19 '19 at 9:20
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Quickly reading very large tables as dataframes
... currently claims to be "1.5-2x slower" than data.table::fread).
read.csv.raw from iotools provides a third option for quickly reading CSV files.
Trying to store as much data as you can in databases rather than flat files. (As well as being a better permanent storage medium, data is passed to and...
Wrapping a C library in Python: C, Cython or ctypes?
...self.handle, buffer, bytes, byref(count)) == OK:
return buffer.raw[:count.value]
raise D2XXException
def write(self, data):
buffer = create_string_buffer(data)
count = c_int()
bytes = len(data)
if d2xx.FT_Write(self.handle, buffer, bytes, byref...
What's the use of Jade or Handlebars when writing AngularJs apps
... I agree with @NickWiggill. Mentally parsing a JADE template vs. raw HTML requires equal 'wetware' cpu time for me. I won't go so far as to say you're unprofessional if you disagree, but to me it's the same thing. @ Philipp, your analogy of parsing C/C++ to assembly being equal to parsin...
How to iterate over rows in a DataFrame in Pandas
...n make arbitrarily complex things work through the simplicity and speed of raw Python code.
Caveats
List comprehensions assume that your data is easy to work with - what that means is your data types are consistent and you don't have NaNs, but this cannot always be guaranteed.
The first one is more...
How do you design object oriented projects? [closed]
...nswers. Nothing about reputation, voting, or the community wiki, just the raw essence of what you're shooting for.
As you come up with potential classes, don't think of them only in terms of what noun they represent, but what responsibilities they have. I've found this to be the biggest aid in fig...
Fastest way to determine if an integer's square root is an integer
... fast convert-to-long function so integer operations can be applied on the raw bytes.
the 0x5f3759df - (i >> 1); line is a pre-calculated seed value for the approximation function.
the * (float*) &i converts the value back to floating point.
the y = y * ( threehalfs - ( x2 * y * y ) ) lin...
How to remove convexity defects in a Sudoku square?
...gt; max_area:
max_area = area
best_cnt = cnt
cv2.drawContours(mask,[best_cnt],0,255,-1)
cv2.drawContours(mask,[best_cnt],0,0,2)
res = cv2.bitwise_and(res,mask)
Result :
3. Finding Vertical lines
kernelx = cv2.getStructuringElement(cv2.MORPH_RECT,(2,10))
dx = cv2.Sobe...
What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...images can also be animated and have transparency.
Good for: Logos, line drawings, and other simple images that need to be small. Only really used for websites.
JPEG - Lossy / Direct
JPEGs images were designed to make detailed photographic images as small as possible by removing informati...
What is Bootstrap?
...ify the default theme as much as you want, but it's a better baseline than raw html, css and js. And this is why it's called "framework".
Different web browsers have different default styles and can act differently, and need different CSS prefixes and things like that. A major benefit of Bootstrap ...