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Mean per group in a data.frame [duplicate]
...columns 3 and 4 of data.frame d, grouping by d$Name, and applying the mean function.
Or, using a formula interface:
aggregate(. ~ Name, d[-2], mean)
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Finding a substring within a list in Python [duplicate]
Example list: mylist = ['abc123', 'def456', 'ghi789']
5 Answers
5
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Match whole string
...ore dynamic pattern use a regular expression.
More on JavaScript regexes: https://developer.mozilla.org/en/JavaScript/Guide/Regular_Expressions
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A command-line HTML pretty-printer: Making messy HTML readable [closed]
...download.
Project homepage: http://www.html-tidy.org/
Group page at W3C: https://www.w3.org/community/htacg/
Github repository: https://github.com/htacg/tidy-html5
Binary downloads: http://www.htacg.org/binaries/
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Best way to determine user's locale within browser
...ected among the languages in the preferred list on Chrome.
By using Intl (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl), developers can override/set the locale to use to render these things, but there are elements that cannot be overridden, such as the <i...
Update or Insert (multiple rows and columns) from subquery in PostgreSQL
...eUploader: {
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Delete all local git branches
...nsertions(+), 0 deletions(-)
create mode 100644 README
$ git branch Story-123-a
$ git branch Story-123-b
$ git branch Story-123-c
$ git branch --merged
Story-123-a
Story-123-b
Story-123-c
* master
$ git branch --merged | grep -v \* | xargs
Story-123-a Story-123-b Story-123-c
$ git branch --me...
How to write a simple database engine [closed]
... useful right now and in the future.
It even has a decent community here: https://stackoverflow.com/questions/tagged/sqlite
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SQLite - replace part of a string
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Why does the Scala compiler disallow overloaded methods with default arguments?
...nes mentioned in several threads.
The named argument spec is here:
http://www.scala-lang.org/sites/default/files/sids/rytz/Mon,%202009-11-09,%2017:29/named-args.pdf
It states:
Overloading If there are multiple overloaded alternatives of a method, at most one is
allowed to specify default argume...