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How to create a new java.io.File in memory?
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How to read a .xlsx file using the pandas Library in iPython?
...lrd workbook.
The string could be a URL. Valid URL schemes include http, ftp, s3,
and file. For file URLs, a host is expected. For instance, a local
file could be file://localhost/path/to/workbook.xlsx
sheetname : string, int, mixed list of strings/ints, or None, default ...
Applying a function to every row of a table using dplyr?
...yr 0.2 (I think) rowwise() is implemented, so the answer to this problem becomes:
iris %>%
rowwise() %>%
mutate(Max.Len= max(Sepal.Length,Petal.Length))
Non rowwise alternative
Five years (!) later this answer still gets a lot of traffic. Since it was given, rowwise is increasingly n...
What is the difference between attribute and property? [closed]
...
In Python...
class X( object ):
def __init__( self ):
self.attribute
def getAttr( self ):
return self.attribute
def setAttr( self, value ):
self.attribute= value
property_name= property( getAttr, setAttr )
A property is a s...
Which characters are valid/invalid in a JSON key name?
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Is std::unique_ptr required to know the full definition of T?
...mplates in the C++ standard library require that they be instantiated with complete types. However shared_ptr and unique_ptr are partial exceptions. Some, but not all of their members can be instantiated with incomplete types. The motivation for this is to support idioms such as pimpl using smart po...
How to install Java 8 on Mac
... cask install java
For the many use cases depending on an older version (commonly Java 8), the AdoptOpenJDK project makes it possible with an extra step.
brew tap adoptopenjdk/openjdk
brew cask install adoptopenjdk8
Existing users of Homebrew may encounter Error: Cask adoptopenjdk8 exists in mu...
SQL Server - copy stored procedures from one db to another
...ResiDazeMaster].[sys].[procedures] p
INNER JOIN [ResiDazeMaster].sys.sql_modules m ON p.object_id = m.object_id
OPEN c
FETCH NEXT FROM c INTO @sql
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = REPLACE(@sql,'''','''''')
SET @sql = 'USE [' + @Name + ']; EXEC(''' + @sql + ''')'
EXEC(@sql)
...
How to select only 1 row from oracle sql?
...
You use ROWNUM.
ie.
SELECT user FROM Dual WHERE ROWNUM = 1
http://docs.oracle.com/cd/B19306_01/server.102/b14200/pseudocolumns009.htm
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Callback functions in Java
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@Omar, agreed. I've come back to Java after a long stint with C# and really miss lambdas/delegates. Come on Java!
– Drew Noakes
May 2 '11 at 14:56
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