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Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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Convert string to a variable name
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There is another simple solution found there:
http://www.r-bloggers.com/converting-a-string-to-a-variable-name-on-the-fly-and-vice-versa-in-r/
To convert a string to a variable:
x <- 42
eval(parse(text = "x"))
[1] 42
And the opposite:
x <- 42
deparse(substitute(x))
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ValueError: invalid literal for int() with base 10: ''
...answered Apr 23 '19 at 3:21
Brad123Brad123
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Sorting a list using Lambda/Linq to objects
... answered Jan 2 '13 at 16:32
gls123gls123
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Easiest way to compare arrays in C#
...or tuples via using StructuralComparisons type:
object[] a1 = { "string", 123, true };
object[] a2 = { "string", 123, true };
Console.WriteLine (a1 == a2); // False (because arrays is reference types)
Console.WriteLine (a1.Equals (a2)); // False (because arrays is reference types)
IStruct...
Interactive search/replace regex in Vim?
...Neovim now has a feature to preview the substitution:
Image taken from: https://medium.com/@eric.burel/stop-using-open-source-5cb19baca44d
Documentation of the feature: https://neovim.io/doc/user/options.html#'inccommand'
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Using an integer as a key in an associative array in JavaScript
...ered Mar 24 '14 at 12:51
Jesuslg123Jesuslg123
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How can I import a database with MySQL from terminal?
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Directly from var/www/html
mysql -u username -p database_name < /path/to/file.sql
From within mysql:
mysql> use db_name;
mysql> source backup-file.sql
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asp.net mvc put controllers into a separate project
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How to get the first element of the List or Set? [duplicate]
...wered Jan 27 '15 at 11:18
Sonson123Sonson123
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