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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...hese are legal:
h = { :$in => array }
h = { :'a.b' => 'c' }
h[:s] = 42
but these are not:
h = { $in: array }
h = { 'a.b': 'c' } # but this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.new => 11 }
h = { 23 => 'pancakes hou...
Print function log /stack trace for entire program using firebug
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edited Mar 8 '18 at 17:46
answered Apr 7 '12 at 21:36
Ma...
What does the line “#!/bin/sh” mean in a UNIX shell script?
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143
It's called a shebang, and tells the parent shell which interpreter should be used to execute t...
Why is document.body null in my javascript?
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edited May 23 '17 at 11:54
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111 silver badge
answered Mar 28 '12 at 22:44
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C# DropDownList with a Dictionary as DataSource
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4 Answers
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Using the slash character in Git branch name
...basically this:
% cd .git/refs/heads
% ls -l
total 0
-rw-rw-r-- 1 jhe jhe 41 2009-11-14 23:51 labs
-rw-rw-r-- 1 jhe jhe 41 2009-11-14 23:51 master
% mkdir labs
mkdir: cannot create directory 'labs': File exists
You're getting the equivalent of the "cannot create directory" error.
When you h...
How to define servlet filter order of execution using annotations in WAR
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edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Jul 3 '11 at 8:13
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Use of 'use utf8;' gives me 'Wide character in print'
...from this:
$ perl -E 'say join ":", map { ord } split //, "鸡\n";'
233:184:161:10
The first three bytes make up your character, the last one is the line-feed.
The call to print sends these four characters to STDOUT. Your console then works out how to display these characters. If your console is...
How to pass a single object[] to a params object[]
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answered Aug 30 '08 at 21:36
Adam WrightAdam Wright
47k1111...
Java: Difference between the setPreferredSize() and setSize() methods in components
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4 Answers
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