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How is Racket different from Scheme?
...This answer should be updated. Racket's feature set far outweighs Scheme's now, with modules and language definitions, etc.
– CinchBlue
Dec 11 '17 at 2:57
1
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How to create abstract properties in python abstract classes
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Since Python 3.3 a bug was fixed meaning the property() decorator is now correctly identified as abstract when applied to an abstract method.
Note: Order matters, you have to use @property before @abstractmethod
Python 3.3+: (python docs):
class C(ABC):
@property
@abstractmethod
...
SQL SELECT WHERE field contains words
...LIKE '%word1%'
OR column1 LIKE '%word2%'
OR column1 LIKE '%word3%'
If you need all words to be present, use this:
SELECT * FROM mytable
WHERE column1 LIKE '%word1%'
AND column1 LIKE '%word2%'
AND column1 LIKE '%word3%'
If you want something faster, you need to look into full text sear...
Why do people say that Ruby is slow? [closed]
...e signal processing app. It's easier to see what people are talking about now after all these helpful answers.
– stephenmurdoch
Apr 27 '10 at 3:13
1
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Python - When to use file vs open
...he moment. They've had a sort of strange relationship, but file() is going now, so there's no need to worry anymore.
The following is from the Python 2.6 docs. [bracket stuff] added by me.
When opening a file, it’s preferable to use open() instead of invoking this [file()] constructor directl...
Auto code completion on Eclipse
...o boxes having checkboxes.
3. check everthing in there and click apply.
4. now ofcourse when you'll be coding there will be auto code completion feature automatically.
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Get Base64 encode file-data from Input Form
...at, but it's here if you want to take a look; it's pretty neat.
What I do now:
The code for converting to string from a Uint8Array is pretty simple (where buf is a Uint8Array):
function uint8ToString(buf) {
var i, length, out = '';
for (i = 0, length = buf.length; i < length; i += 1) {...
How to print to console in pytest?
...es the result of standard out so that it can control how it prints it out. If it didn't do this, it would spew out a lot of text without the context of what test printed that text.
However, if a test fails, it will include a section in the resulting report that shows what was printed to standard ou...
List comprehension vs map
... {x:x**2 for x in rangeNeg5}
)
Efficiency comparison for python3
map is now lazy:
% python3 -mtimeit -s 'xs=range(1000)' 'f=lambda x:x' 'z=map(f,xs)'
1000000 loops, best of 3: 0.336 usec per loop ^^^^^^^^^
Therefore if you will not be using all your data, or do not know ahead of tim...
Python glob multiple filetypes
... a list of multiple file types such as .txt, .mdown, and .markdown? Right now I have something like this:
32 Answers
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