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How to add new item to hash
I'm new to Ruby and don't know how to add new item to already existing hash. For example, first I construct hash:
7 Answers...
Button in a column, getting the row from which it came on the Click event handler
... inherit the datacontext of a row data object. I am calling it as MyObject and hope MyObject.ID is what you wanted.
private void Button_Click(object sender, RoutedEventArgs e)
{
MyObject obj = ((FrameworkElement)sender).DataContext as MyObject;
//Do whatever you wanted to do with MyObject.I...
Will ConfigurationManager.AppSettings[“blah”] throw an exception if “blah” doesn't exist?
...returns null in the following cases: 1) if the specified key is not found; and 2) if the specified key is found and its associated value is null. This property does not distinguish between the two cases.
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Get “Internal error in the expression evaluator” on “Add watch” function when trying to debug WCF se
...s the issue, then I'd suggest trying to reproduce it with a small project, and then reporting it on Connect, so it could be fixed.
@bjhuffine comments below that there are other ways to enable compatibility mode, without globally disabling it (e.g. per-project). More information here: https://devbl...
Installing Latest version of git in ubuntu
...a
sudo apt-get update
sudo apt-get install git
If add-apt-repository command is not found, install it first with
sudo apt-get install software-properties-common python-software-properties
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How to execute a java .class from the command line
...classpath ( where java looks for .class definitions )
If that's the case and listing the contents of your dir displays:
Echo.java
Echo.class
Then any of this may work:
java -cp . Echo "hello"
or
SET CLASSPATH=%CLASSPATH;.
java Echo "hello"
And later as Fredrik points out you'll get an...
What is the best way to deal with the NSDateFormatter locale “feechur”?
...to self = [self init]; causes the NSDateFormatter initialization to occur, and setLocale is happy again.
Here is the "final" source for the category's .m:
#import "NSDateFormatter+Locale.h"
@implementation NSDateFormatter (Locale)
- (id)initWithSafeLocale {
static NSLocale* en_US_POSIX = nil;
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How to include “zero” / “0” results in COUNT aggregate?
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You want an outer join for this (and you need to use person as the "driving" table)
SELECT person.person_id, COUNT(appointment.person_id) AS "number_of_appointments"
FROM person
LEFT JOIN appointment ON person.person_id = appointment.person_id
GROUP BY p...
.net implementation of bcrypt
...I'm a bit unsure of just picking an implementation that turns up in google and am thinking that I may be better off using sha256 in the System.Security.Cryptography namespace, at least then I know it's supported! What are you thoughts?
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What is the __DynamicallyInvokable attribute for?
... a type defined in its own assembly.
// So the ctor is always a MethodDef and the type a TypeDef.
// We cache this ctor MethodDef token for faster custom attribute lookup.
// If this attribute type doesn't exist in the assembly, it means the assembly
// doesn't contain any blessed APIs.
Type in...