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Node.js quick file server (static files over HTTP)
...n a previous answer here
// Website you wish to allow to connect
response.setHeader('Access-Control-Allow-Origin', '*');
// Request methods you wish to allow
response.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
// Request headers you wish to allow
response...
Merging objects (associative arrays)
What’s the best/standard way of merging two associative arrays in JavaScript? Does everyone just do it by rolling their own for loop?
...
How do I trim leading/trailing whitespace in a standard way?
...nd > str && isspace((unsigned char)*end)) end--;
end++;
// Set output size to minimum of trimmed string length and buffer size minus 1
out_size = (end - str) < len-1 ? (end - str) : len-1;
// Copy trimmed string and add null terminator
memcpy(out, str, out_size);
out[out_...
Git commits are duplicated in the same branch after doing a rebase
...shes to the server without issue. To fix the issue at this stage, we can reset back to before we ran git pull:
Look at the reflog (git reflog) to see what the commit hash was before we ran git pull.
070e71d HEAD@{1}: pull: Merge made by the 'recursive' strategy.
ba7688a HEAD@{2}: rebase -i (finish...
Any reason not to use '+' to concatenate two strings?
A common antipattern in Python is to concatenate a sequence of strings using + in a loop. This is bad because the Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, b...
Algorithm to generate a crossword
...ndomization/Annealing approaches can also work (although within the proper setting).
Efficient simplicity might just be the ultimate wisdom !
The requirements were for a more or less complete crossword compiler and (visual WYSIWYG) builder.
Leaving aside the WYSIWYG builder part, the compiler ou...
Print in one line dynamically
...t item to:
print item, in Python 2.7
print(item, end=" ") in Python 3
If you want to print the data dynamically use following syntax:
print(item, sep=' ', end='', flush=True) in Python 3
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Subscripts in plots in R
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Why are empty strings returned in split() results?
...thing you want -- contrary to man-in-the-street horse-sense, maybe [[empty sets, like zero &c, have always confused most people;-)]], but fully conforming to obvious well-refined mathematical common-sense!-).
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Which comment style should I use in batch files?
...ht. For instance, %VAR% variables are expanded. Suppose you have (wrongly) set TARGET=C:\Program Files (x86)\"foo.exe", and inside a DO(..) expression you have :: echo %TARGET% you will get an error because the (x86) gets expanded before the whole expression gets evaluated, leading to an invalid DO(...