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How to combine multiple conditions to subset a data-frame using “OR”?
...
my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | data$V2 &...
Why isn't String.Empty a constant?
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OO Design in Rails: Where to put stuff
...ng one or more methods within a class that operate on a clearly-defined subset of its attributes is one way to try identifying classes that might be refactored out of your ActiveRecord-derived model.
Rails models don't have to be subclasses of ActiveRecord::Base, by the way. Or to put it another w...
Are PHP functions case sensitive?
...g is that if the change is ever made, case-sensitivity would be an option, set in php.ini. Thus preserving backwards compatibility.
– ToolmakerSteve
Aug 17 '14 at 5:48
add a ...
Check if a value is in an array (C#)
...g[] printer = {"jupiter", "neptune", "pangea", "mercury", "sonic"};
PrinterSetup(printer);
// redefine PrinterSetup this way:
public void PrinterSetup(string[] printer)
{
foreach (p in printer.Where(c => c == "jupiter"))
{
Process.Start("BLAH BLAH CODE TO ADD PRINTER VIA WINDOWS ...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...中添加如下代码：
//设置控件类似于ListCtrl的表现
m_Grid.SetListMode(TRUE);
//设置控件的初始行数和列数
m_Grid.SetRowCount(1);
m_Grid.SetColumnCount(4);
//设置控件背景颜色，这里GetDefaultCell的两个参数分别表示是否是固定行或者是固...
How to return a string value from a Bash function
...
@Evi1M4chine, um...no, you can't. You can set a global variable and call it "return", as I see you do in your scripts. But then that is by convention, NOT actually tied programmatically to the execution of your code. "clearly a better way"? Um, no. Command substi...
How to check if a process is running via a batch script
... file. At the end I could find a fairly simple solution, so I share it...
SETLOCAL EnableExtensions
set EXE=myprog.exe
FOR /F %%x IN ('tasklist /NH /FI "IMAGENAME eq %EXE%"') DO IF %%x == %EXE% goto FOUND
echo Not running
goto FIN
:FOUND
echo Running
:FIN
This is working for me nicely...
...
SQLAlchemy: print the actual query
...es, such as ints and strings, and furthermore if a bindparam
without a pre-set value is used directly, it won't be able to
stringify that either.
To support inline literal rendering for types not supported, implement
a TypeDecorator for the target type which includes a
TypeDecorator.process_literal_...
What's the best way to validate an XML file against an XSD file?
...ing the ErrorHandler and associating it with the validator? i.e. validator.SetErrorHandler() as in the example in this SO question stackoverflow.com/questions/4864681/…?
– ziggy
Jul 22 '12 at 18:14
...