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When to use lambda, when to use Proc.new?
...ambda is strict about the number of arguments it accepts, whereas Proc.new converts missing arguments to nil. Here is an example IRB session illustrating the difference:
irb(main):001:0> l = lambda { |x, y| x + y }
=> #<Proc:0x00007fc605ec0748@(irb):1>
irb(main):002:0> p = Proc.new ...
Redefine tab as 4 spaces
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One more thing, use :retab to convert existing tab to spaces. vim.wikia.com/wiki/Converting_tabs_to_spaces
– DawnSong
Nov 10 '16 at 14:39
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SQL select join: is it possible to prefix all columns as 'prefix.*'?
...ames prefixed, here is the function in pl/pgsql, it's not easy but you can convert it to other procedure languages.
-- Create alias-view for specific table.
create or replace function mkaview(schema varchar, tab varchar, prefix varchar)
returns table(orig varchar, alias varchar) as $$
declare
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data.frame rows to a list
I have a data.frame which I would like to convert to a list by rows, meaning each row would correspond to its own list elements. In other words, I would like a list that is as long as the data.frame has rows.
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Preferred method to store PHP arrays (json_encode vs serialize)
...at file for caching purposes. I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
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Where did the name `atoi` come from?
In the C language where did they come up with the name atoi for converting a string to an integer? The only thing I can think of is Array To Integer for an acronym but that doesn't really make sense.
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How to get MD5 sum of a string using python?
...xception. Encoding a bytestring will leave ascii characters untouched and convert unicode correctly
– Charles L.
Aug 20 '18 at 16:13
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Why does “,,,” == Array(4) in Javascript?
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Because the right hand operand is converted to a string and the string representation of Array(4) is ,,,:
> Array(4).toString()
",,,"
If you use the array constructor function and pass a number, it sets the length of the array to that number. So you ...
How to get Scala List from Java List?
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EDIT: Note that this is deprecated since 2.12.0. Use JavaConverters instead. (comment by @Yaroslav)
Since Scala 2.8 this conversion is now built into the language using:
import scala.collection.JavaConversions._
...
lst.toList.foreach{ node => .... }
works. asScala did not ...
Get “Value” property in IGrouping
...value is comparable to ToList() only there is more of an overhead there to convert it to a list as opposed to just pulling out a value
– Coops
Dec 17 '14 at 15:25
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