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How do I check if a directory exists? “is_dir”, “file_exists” or both?
I want to create a directory if it does'nt exist already.
12 Answers
12
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join list of lists in python [duplicate]
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If you're only going one level deep, a nested comprehension will also work:
>>> x = [["a","b"], ["c"]]
>>> [inner
... for outer in x
... for inner in outer]
['a', 'b', 'c']
On one line, that b...
How can I change the language (to english) in Oracle SQL Developer?
...locales option in ide.boot file (located in ide\bin folder).
For example, if I want to 'break' french language support this option will be:
oracle.translated.locales = de,es,it,ja,ko,pt_BR,zh_CN,zh_TW
The original value was:
oracle.translated.locales = de,fr,es,it,ja,ko,pt_BR,zh_CN,zh_TW
The ...
Graphviz: How to go from .dot to a graph?
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type: dot -Tps filename.dot -o outfile.ps
If you want to use the dot renderer. There are alternatives like neato and twopi. If graphiz isn't in your path, figure out where it is installed and run it from there.
You can change the output format by varying the value a...
How to check if an object is an array?
...rite a function that either accepts a list of strings, or a single string. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
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How to get the last char of a string in PHP?
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If you’re using multibyte character encodings like UTF-8, use mb_substr (php.net/mb_substr) instead.
– Gumbo
Apr 21 '10 at 10:19
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ValueError: invalid literal for int() with base 10: ''
I am creating a program that reads a file and if the first line of the file is not blank, it reads the next four lines. Calculations are performed on those lines and then the next line is read. If that line is not empty it continues. However, I am getting this error:
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How do I check if an index exists on a table field in MySQL?
...me instead of Key_name, this way you don't need to find out the index name if it is automatically added without name.
– Programista
Apr 9 '14 at 11:05
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How do you get a timestamp in JavaScript?
...ny alteration).
Details:
On almost all current browsers you can use Date.now() to get the UTC timestamp in milliseconds; a notable exception to this is IE8 and earlier (see compatibility table).
You can easily make a shim for this, though:
if (!Date.now) {
Date.now = function() { return new ...
Find a value in an array of objects in Javascript [duplicate]
I know similar questions have been asked before, but this one is a little different. I have an array of unnamed objects, which contain an array of named objects, and I need to get the object where "name" is "string 1". Here is an example array.
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