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How to change the foreign key referential action? (behavior)
...et up a table that contains a column with a foreign key, set to ON DELETE CASCADE (delete child when parent is deleted)
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Visual Studio, debug one of multiple threads
I have an application with 4 threads working the same code. However, when I step it jumps between the different threads. How can I lock it to one thread so the other threads are ignored for debugging?
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How do I make a reference to a figure in markdown using pandoc?
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In pandoc you can even do:
See figure \ref{mylabel}.
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Insert new column into table in sqlite?
...ALTER TABLE {tableName} ADD COLUMN COLNew {type};
Second, and more complicatedly, but would actually put the column where you want it, would be to rename the table:
ALTER TABLE {tableName} RENAME TO TempOldTable;
Then create the new table with the missing column:
CREATE TABLE {tableName} (name...
How to validate inputs dynamically created using ng-repeat, ng-show (angular)
...s of today, it is not possible (without using a custom directive) to dynamically generate a name of an input. Indeed, checking input docs we can see that the name attribute accepts a string only.
To solve the 'dynamic name' problem you need to create an inner form (see ng-form):
<div ng-repeat=...
Actual meaning of 'shell=True' in subprocess
I am calling different processes with the subprocess module. However, I have a question.
5 Answers
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C# generic type constraint for everything nullable
...me check in Foo's constructor rather than having a compile-time check, you can check if the type is not a reference or nullable type, and throw an exception if that's the case.
I realise that only having a runtime check may be unacceptable, but just in case:
public class Foo<T>
{
private...
how to get the cookies from a php curl into a variable
...if instead of using soap or xml-rpc or rest or any other reasonable communication protocol he just embedded all of his response as cookies in the header.
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raw vs. html_safe vs. h to unescape html
...tml_safe actually "sets the string" as HTML Safe (it's a little more complicated than that, but it's basically it). This way, you can return HTML Safe strings from helpers or models at will.
h can only be used from within a controller or view, since it's from a helper. It will force the output to b...
Vagrant reverse port forwarding?
...ou wanted to connect to port 12345 on the guest and have it forwarded to localhost:80, you would use this command:
ssh -p 2222 -R 12345:localhost:80 -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR -o IdentitiesOnly=yes -i ~/.vagrant.d/insecure_private_key vagrant@127.0...