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Reusing output from last command in Bash
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You can save yourself from typing $(your_cmd) by using backticks: `your_cmd` According to the Gnu Bash manual they are functionally identical. Of course this is also subject to the warning raised by @memecs
– user2065875
Apr 20 '15 ...
OS X Terminal Colors [closed]
...diting .bash_profile, start a Terminal and force the changes to take place by executing:
source ~/.bash_profile
Then go to Terminal > Preferences, click on the Profiles tab and then the Text subtab and check Display ANSI Colors.
Verified on Sierra (May 2017).
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Best Practice to Organize Javascript Library & CSS Folder Structure [closed]
...tant distinction. To do an effective grouping of your files you must start by separating general-purpose files from application-specific resources. appcropolis-project resources vendors my-index.html This simple separation makes navigating through your files a lot easier. Once you place librar...
Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...y.join
Straight string concatenation
Then I created the same three tests by abstracting them into StringBuilderConcat, StringBuilderArrayPush and StringBuilderArrayIndex http://jsperf.com/string-concat-without-sringbuilder/5 Please go there and run tests so we can get a nice sample. Note that I fi...
OpenJDK availability for Windows OS [closed]
... I'm downvoting this. Nothing personal, but an OpenJDK build built by someone on the internet cannot easily be trusted. Who is this ojdkbuild entity anyway? How do I know I'm not distributing malware?
– Lukas Eder
Sep 12 '18 at 14:22
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Shell script - remove first and last quote (") from a variable
...t from a larger script. It removes the quotes from the string that is held by a variable. I am doing it using sed, but is it efficient? If not, then what is the efficient way?
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Why is “origin/HEAD” shown when running “git branch -r”?
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@robinst is correct.
In git, you can select which branch is checked out by default (i.e. when you clone). By default, origin/HEAD will point at that.
On GitHub, You can change this in the Admin settings for your GitHub repo. You can also do it from the command-line via
git remote set-head origi...
Split a List into smaller lists of N size
...ays that .Count is an O(1) operation, so I doubt you'd see any improvement by storing it in a variable: docs.microsoft.com/en-us/dotnet/api/…
– user1666620
Sep 15 at 13:54
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List of installed gems?
Is there a Ruby method I can call to get the list of installed gems?
11 Answers
11
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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...ou can't do this either:
list tail length
You could use infix notation by using parenthesis to mark end of expressions:
(list tail) map (...)
(list tail) length
Note that postfix notation is discouraged because it may be unsafe.
I hope this has cleared all the doubts. If not, just drop a c...