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Iterate an iterator by chunks (of n) in Python? [duplicate]
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The grouper() recipe from the itertools documentation's recipes comes close to what you want:
def grouper(n, iterable, fillvalue=None):
"grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
args = [iter(iterable)] * n
return izip_longest(f...
Checking images for similarity with OpenCV
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This is a huge topic, with answers from 3 lines of code to entire research magazines.
I will outline the most common such techniques and their results.
Comparing histograms
One of the simplest & fastest methods. Proposed decades ago as a means to find pict...
Difference between subprocess.Popen and os.system
... @JacobMarble so suppose I am calling a selenium scraping script from another python script, which of these would allow me to complete the scraping script and then and only then execute the next line of code? As in, my scraping should complete before the execution can continue.
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Ruby: How to post a file via HTTP as multipart/form-data?
I want to do an HTTP POST that looks like an HMTL form posted from a browser. Specifically, post some text fields and a file field.
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What's the difference between URI.escape and CGI.escape?
...a string (URL) into, so called, "Percent-encoding".
CGI::escape is coming from the CGI spec, which describes how data should be encoded/decode between web server and application.
Now, let's say that you need to escape a URI in your app. It is a more specific use case.
For that, the Ruby community...
Task continuation on UI thread
...standard' way to specify that a task continuation should run on the thread from which the initial task was created?
5 Answe...
What's the difference of ContentType and MimeType
...a entry) has its origin in extending internet mail, and specifically SMTP. From there, the MIME and MIME-inspired extension design has found its way into a lot of other protocols (such as HTTP here), and is still being used when new kinds of metadata or data need to be transmitted in an existing pro...
How to convert numbers between hexadecimal and decimal
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To convert from decimal to hex do...
string hexValue = decValue.ToString("X");
To convert from hex to decimal do either...
int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
or
int decValue = Conve...
Should I pass an std::function by const-reference?
...n the main thread.
In case (A), the std::function is directly constructed from our lambda, which is then used within the run_in_ui_thread. The lambda is moved into the std::function, so any movable state is efficiently carried into it.
In the second case, a temporary std::function is created, the...
How can I add timestamp to logs using Node.js library Winston?
...rap this in a dedicated file so that I can easily get my configured logger from any file, i.e., I put the above code (option 2) in a new file logger.js, followed by module.exports = logger; then from any file I do var logger = require('./logger.js') and can then do logger.info('hello') from any file...