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Ruby class types and case statements
... the when clause. In Ruby
case item
when MyClass
...
when Array
...
when String
...
is really
if MyClass === item
...
elsif Array === item
...
elsif String === item
...
Understand that case is calling a threequal method (MyClass.===(item) for example), and that method can be defined to do wha...
How to use Bash to create a folder if it doesn't already exist?
...
First, in bash "[" is just a command, which expects string "]" as a last argument, so the whitespace before the closing bracket (as well as between "!" and "-d" which need to be two separate arguments too) is important:
if [ ! -d /home/mlzboy/b2c2/shared/db ]; then
mkdir -p...
How to remove specific element from an array using python
...
['bala@bala.com']
This will remove the first occurence that matches the string.
EDIT: After your edit, you still don't need to iterate over. Just do:
index = initial_list.index(item1)
del initial_list[index]
del other_list[index]
...
How can I make gdb save the command history?
...ze is unlimited or if GDBHISTSIZE is either a negative number or the empty string, then the number of commands gdb keeps in the history list is unlimited".
set history size <size>
A related command is set history remove-duplicates <count>. The command is described as "Control the remo...
How to download/checkout a project from Google Code in Windows?
.../trunk/ projectname-read-only
Note the space between the URL and the last string is intentional, the last string is the folder name into which the source will be downloaded.
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curl -GET and -X GET
...them in the request body with POST, put them at the end of the URL's query string and issue a GET, with the use of `-G. Like this:
curl -d name=daniel -d grumpy=yes -G https://example.com/
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How to get a URL parameter in Express?
...e. For named route "parameters" (e.g. /p/:tagId) use req.params. For query strings (e.g. /p?tagId=5) use req.query.
– Nateowami
Jun 19 '15 at 8:18
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Capturing Ctrl-c in ruby
...erminate; exit}
puts "Starting up"
while true do
message = socket.recv_string
puts "Message: #{message.inspect}"
socket.send_string("Message received")
end
Source
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Providing a default value for an Optional in Swift?
...as coalescing operator (??) that allows that. For example, for an optional String myOptional you could write:
result = myOptional ?? "n/a"
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
...ith display-local-help."))
which is a format used for text properties in strings where:
"-%-", text to be propertized: one dash and a %-construct that results in "dashes sufficient to fill the remainder of the mode line", resulting in the famous Emacs ------.
0, the first character upon which th...