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Generate array of all letters and digits
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145
[*('a'..'z'), *('0'..'9')] # doesn't work in Ruby 1.8
or
('a'..'z').to_a + ('0'..'9').to_a #...
What is %2C in a URL?
...hr |
+----+-----+----+-----+----+-----+----+-----+
| 00 | NUL | 20 | SPC | 40 | @ | 60 | ` |
| 01 | SOH | 21 | ! | 41 | A | 61 | a |
| 02 | STX | 22 | " | 42 | B | 62 | b |
| 03 | ETX | 23 | # | 43 | C | 63 | c |
| 04 | EOT | 24 | $ | 44 | D | 64 | d |
| 05 | ENQ | 25 | ...
How do I ALTER a PostgreSQL table and make a column unique?
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edited Oct 20 '14 at 17:12
rdrey
8,06633 gold badges3232 silver badges4848 bronze badges
answe...
str.startswith with a list of strings to test for
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edited Jul 18 '14 at 20:40
answered Dec 9 '13 at 2:01
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Nested JSON objects - do I have to use arrays for everything?
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204
You don't need to use arrays.
JSON values can be arrays, objects, or primitives (numbers or str...
How to get the name of a class without the package?
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4
I didn't know it could return an empty string, and IMHO that's a design flaw. If there is no simple name it should throw an exception.
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C++ include and import difference
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answered Oct 5 '08 at 16:54
Head GeekHead Geek
32.5k2020 gold badges7272 silver badges8282 bronze badges
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What does the “-U” option stand for in pip install -U
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174
Type pip install -h to list help:
-U, --upgrade Upgrade all packages to the newest a...
Why does “_” (underscore) match “-” (hyphen)?
...rary number of characters (including zero characters).
(From section 3.3.4.7. Pattern Matching in the MySQL documentation.)
If you want to use the underscore in like as a literal, you have to escape it:
select * from a where name like '%taz\_manual%.pdf%';
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how to view the contents of a .pem certificate
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143
Use the -printcert command like this:
keytool -printcert -file certificate.pem
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