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grep a tab in UNIX
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384
If using GNU grep, you can use the Perl-style regexp:
grep -P '\t' *
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How can I view the source code for a function?
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UseMethod("t") is telling you that t() is a (S3) generic function that has methods for different object classes.
The S3 method dispatch system
For S3 classes, you can use the methods function to list the methods for a particular generic function or class.
> methods...
How to reuse existing C# class definitions in TypeScript projects
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FentonFenton
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How to negate a method reference predicate
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edited Jun 16 at 13:09
answered Jul 20 '18 at 9:58
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Checking for empty arrays: count vs empty
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23
@prodigitalson I would say that count is O(1), since PHP stores the number of elements internally. Check out this answer stackoverflow.com/a...
E11000 duplicate key error index in mongodb mongoose
...t;name>).
– RickN
Jun 26 '14 at 13:51
17
Or use db.users.dropIndexes() if you're making multip...
Seeding the random number generator in Javascript
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13 Answers
13
Active
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How to dump a table to console?
...e from Penlight:
> t = { a = { b = { c = "Hello world!", 1 }, 2, d = { 3 } } }
> require 'pl.pretty'.dump(t)
{
a = {
d = {
3
},
b = {
c = "Hello world!",
1
},
2
}
}
share
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In SQL, how can you “group by” in ranges?
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edited Jul 16 at 21:43
Dale K
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answered Oct ...
How to trim leading and trailing white spaces of a string?
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34
There's a bunch of functions to trim strings in go.
See them there : Trim
Here's an example, ...