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Extract substring in Bash
...ut -d'_' -f 2
More generic:
INPUT='someletters_12345_moreleters.ext'
SUBSTRING=$(echo $INPUT| cut -d'_' -f 2)
echo $SUBSTRING
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How to get current relative directory of your Makefile?
...y around this since $(MAKEFILE_LIST) with two makefiles gives you a single string "Makefile One Makefile Two, which cannot handle spaces
– mrosales
Jan 24 '15 at 17:05
2
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Unlimited Bash History [closed]
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Set HISTSIZE and HISTFILESIZE in .bashrc to an empty string:
HISTSIZE=
HISTFILESIZE=
In bash 4.3 and later you can also use HISTSIZE=-1 HISTFILESIZE=-1:
n. Setting HISTSIZE to a value less than zero causes the history list to be
unlimited (setting it 0 zero disables t...
UITableView : viewForHeaderInSection: not called during reloadData:
... automatically set to the all-caps version of the titleForHeaderInSection: string. To prevent this behavior, either don't implement titleForHeaderInSection: or use a custom label instead of the inherited textLabel.
– Ortwin Gentz
Mar 21 '18 at 15:04
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How to handle change of checkbox using jQuery?
...do stuff here. It will fire on any checkbox change
});
Code: http://jsfiddle.net/s6fe9/
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Fluent and Query Expression — Is there any benefit(s) of one over other?
...clauses)
When doing joins
Here's an example (from the LINQPad samples):
string[] fullNames = { "Anne Williams", "John Fred Smith", "Sue Green" };
var query =
from fullName in fullNames
from name in fullName.Split()
orderby fullName, name
select name + " came from " + fullName;
Now comp...
Why does a return in `finally` override `try`?
...ors
} finally {
return res.send('finally');
}
This code will show the string try in your browser. ALSO, the example will show an error in your console. The res.send() function is called twice. This will happen with anything that is a function. The try-catch-finally block will obfuscate this fac...
How to index into a dictionary?
...("yellow", "8")]
if you don't need access by key. (Why are your numbers strings by the way?)
In Python 3.7, normal dictionaries are ordered, so you don't need to use OrderedDict anymore (but you still can – it's basically the same type). The CPython implementation of Python 3.6 already includ...
Clear the cache in JavaScript
...rious other answers. In addition, see Revving Filenames: don’t use querystring for reasons not to use ?v=n as your versioning scheme.
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Serializing class instance to JSON
I am trying to create a JSON string representation of a class instance and having difficulty. Let's say the class is built like this:
...