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Object.getOwnPropertyNames vs Object.keys
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There is a little difference. Object.getOwnPropertyNames(a) returns all own properties of the object a. Object.keys(a) returns all enumerable own properties. It means that if you define your object properties without making some of them enumerable: false these two methods will give you the sa...
How do I pass a string into subprocess.Popen (using the stdin argument)?
...l command and get its exit status, and its output as a string back in one call:
#!/usr/bin/env python3
from subprocess import run, PIPE
p = run(['grep', 'f'], stdout=PIPE,
input='one\ntwo\nthree\nfour\nfive\nsix\n', encoding='ascii')
print(p.returncode)
# -> 0
print(p.stdout)
# -> fo...
Resolve absolute path from relative path and/or file name
...e current working directory, which is obviously not what you want.
Personally, I often use the %~dp0%~1 idiom in my batch file, which interpret the first argument relative to the path of the executing batch. It does have a shortcoming though: it miserably fails if the first argument is fully-quali...
Is a LINQ statement faster than a 'foreach' loop?
...ting a Mesh Rendering manager and thought it would be a good idea to group all of the meshes which use the same shader and then render these while I'm in that shader pass.
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MySQL indexes - what are the best practices?
...SQL databases for a while now but never properly learnt about them. Generally I put an index on any fields that I will be searching or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
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git rebase fatal: Needed a single revision
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The latter should actually work - origin in ref context is interpreted as origin/HEAD. I've seen repositories end up not knowing what origin/HEAD is, though...
– Cascabel
Jan 25 '11 at 20:15
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Create RegExps on the fly using string variables
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With string literals this is easy enough.
Not really! The example only replaces the first occurrence of string_to_replace. More commonly you want to replace all occurrences, in which case, you have to convert the string into a global (/.../g) RegExp. You can do this from a...
Creating Multifield Indexes in Mongoose / MongoDB
...tically-valid identifiers. field1 and field2 are valid identifiers. field1.foo isn't, for example.
– Gus
Apr 29 at 10:50
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what is faster: in_array or isset? [closed]
... value until it finds a match.
Being an opcode, it has less overhead than calling the in_array built-in function.
These can be demonstrated by using an array with values (10,000 in the test below), forcing in_array to do more searching.
isset: 0.009623
in_array: 1.738441
This builds on Jason...
Vim multiline editing like in sublimetext?
...d asd" asd asd;
asd "asd asd" asd asd;
asd "asd asd" asd asd;
:norm[al] allows you to execute normal mode commands on a range of lines (the '<,'> part is added automatically by Vim and means "act on the selected area")
^ puts the cursor on the first char of the line
w moves to the next word...