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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
... a special case of foldLeft
scala> val intParList: ParSeq[Int] = (1 to 100000).map(_ => scala.util.Random.nextInt()).par
scala> timeMany(1000, intParList.reduce(_ + _))
Took 462.395867 milli seconds
scala> timeMany(1000, intParList.foldLeft(0)(_ + _))
Took 2589.363031 milli seconds
...
Remove all spaces from a string in SQL Server
...ata:
CREATE TABLE tbl_RemoveExtraSpaces
(
Rno INT
,Name VARCHAR(100)
)
GO
INSERT INTO tbl_RemoveExtraSpaces VALUES (1,'I am Anvesh Patel')
INSERT INTO tbl_RemoveExtraSpaces VALUES (2,'Database Research and Development ')
INSERT INTO tbl_RemoveExtraSpaces VALUES (3,'Databa...
互联网运营人员必备的12款工具 - 资讯 - 清泛网 - 专注C/C++及内核技术
...运营方面的能力，让运营从此得心应手。
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HttpServletRequest to complete URL
...
+100
The HttpServletRequest has the following methods:
getRequestURL() - returns the part of the full URL before query string separator...
How to check which version of v8 is installed with my NodeJS?
...
100
or, you could just ask node which version is installed via process.versions. A little bit easier than hunting through the change log. no...
Execute stored procedure with an Output parameter?
...
Procedure Example :
Create Procedure [dbo].[test]
@Name varchar(100),
@ID int Output
As
Begin
SELECT @ID = UserID from tbl_UserMaster where Name = @Name
Return;
END
How to call this procedure
Declare @ID int
EXECUTE [dbo].[test] 'Abhishek',@ID OUTPUT
PRINT @ID
...
Determine the number of NA values in a column
... sum(is.na(x))) %>%
gather(feature, num_nulls) %>%
print(n = 100)
share
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improve this answer
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follow
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...
Convert int to string?
...speed comparisons between several different ways to do the conversion from 100 iterations up to 21,474,836 iterations.
It seems pretty much a tie between:
int someInt = 0;
someInt.ToString(); //this was fastest half the time
//and
Convert.ToString(someInt); //this was the fastest the other half th...
Is floating point math broken?
...standard binary64 format, the representation can be written exactly as
0.1000000000000000055511151231257827021181583404541015625 in decimal, or
0x1.999999999999ap-4 in C99 hexfloat notation.
In contrast, the rational number 0.1, which is 1/10, can be written exactly as
0.1 in decimal, or
0x1.9...
How do I speed up the scroll speed in a JScrollPane when using the mouse wheel?
...y ScrollPane
try this
scrollPane.getVerticalScrollBar().setUnitIncrement(100);
scrollPane.getViewport().putClientProperty("EnableWindowBlit", Boolean.TRUE);
scrollPane.getViewport().setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
...