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Select first row in each GROUP BY group?
...you have created the required multi-column index). See explainextended.com/2009/05/03/postgresql-optimizing-distinct for a possible solution.
– Meekohi
Mar 24 '14 at 15:52
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Various ways to remove local Git changes
...is git reset --hard head. This link was also helpful gitready.com/beginner/2009/01/18/the-staging-area.html
– spiderman
Mar 24 '14 at 22:38
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Filter rows which contain a certain string
...SA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html
df <- read_csv("Downloads/2008.csv")
print(dim(df))
# [1] 7009728 29
benchmark(
"str_detect" = {df %>% filter(str_detect(Dest, 'MCO|BWI'))},
"grepl" = {df %>% filter(grepl('MCO|BWI', Dest...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...ences:
PEP 380 - Syntax for delegating to a sub-generator (Ewing) [v3.3, 2009-02-13]
PEP 342 -
Coroutines via Enhanced Generators (GvR, Eby) [v2.5, 2005-05-10]
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What’s the difference between ScalaTest and Scala Specs unit test frameworks?
..., you can watch the "Get Higher with ScalaTest" presentation I gave at the 2009 Devoxx conference here:
http://parleys.com/play/514892260364bc17fc56bde3/chapter0/about
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Is multiplication and division using shift operators in C actually faster?
...ficient instruction sequence for them. shape-of-code.coding-guidelines.com/2009/06/30/…
– Pascal Cuoq
May 8 '12 at 17:19
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Update relationships when saving changes of EF4 POCO objects
...ur-whole-object.html Another satisfied NHibernate user: codinginstinct.com/2009/11/…
– Michael Buen
Aug 9 '11 at 11:30
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Loop through an array in JavaScript
...years as the time of writing that the ES5 specification was released (Dec. 2009), it has been implemented by nearly all modern engines in the desktop, server, and mobile environments, so it's safe to use them.
And with the ES6 arrow function syntax, it's even more succinct:
array.forEach(item => ...
Should CSS always preceed Javascript?
...ut I'll add an article relevant to what he mentions: stevesouders.com/blog/2009/04/27/…
– Juan Pablo Buritica
Feb 14 '12 at 6:31
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var functionName = function() {} vs function functionName() {}
...moved into the canonical question.)
Terms:
ES5: ECMAScript 5th edition, 2009
ES2015: ECMAScript 2015 (also known as "ES6")
The quick list:
Function Declaration
"Anonymous" function Expression (which despite the term, sometimes create functions with names)
Named function Expression
Accessor Fu...