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Most efficient way to check for DBNull and then assign to a variable?
...to be the most efficient.
I'd suggest something along the lines of:
int? myValue = (Convert.IsDBNull(row["column"]) ? null : (int?) Convert.ToInt32(row["column"]));
And yes, the compiler should cache it for you.
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Why does calling a method in my derived class call the base class method?
Consider this code:
16 Answers
16
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How do I “commit” changes in a git submodule? [duplicate]
I have, in my naivety, set up a git submodule and treated it like a Subversion external - i.e. it's now full of changes that I've just realized haven't been committed or pushed anywhere.
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Automating “enter” keypresses for bash script generating ssh keys
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Try:
ssh-keygen -t rsa -N "" -f my.key
-N "" tells it to use an empty passphrase (the same as two of the enters in an interactive script)
-f my.key tells it to store the key into my.key (change as you see fit).
The whole thing runs without you needing t...
Calling Python in Java?
... from the new Java6 interpreter support.
A simple example from the top of my head - but should work I hope: (no error checking done for brevity)
PythonInterpreter interpreter = new PythonInterpreter();
interpreter.exec("import sys\nsys.path.append('pathToModules if they are not there by default')\...
How to evaluate http response codes from bash/shell script?
...final status. If you want to show all HTTP statuses for all requests, use my example below.
– siliconrockstar
Oct 31 '15 at 2:52
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How to insert a row in an HTML table body in JavaScript
...reference to it and add it there.
var tableRef = document.getElementById('myTable').getElementsByTagName('tbody')[0];
// Insert a row in the table at the last row
var newRow = tableRef.insertRow();
// Insert a cell in the row at index 0
var newCell = newRow.insertCell(0);
// Append a text nod...
Disable ActiveRecord for Rails 4
...reating a new application, you can use -O to skip ActiveRecord:
rails new my_app -O
For existing applications:
1. Remove database adapter gems from your Gemfile (mysql2, sqlite3, etc.)
2. Change your config/application.rb
Remove require 'rails/all line and require frameworks (among those avail...
Force update of an Android app when a new version is available
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If they change the itemprop value, then it'd affect my apps too, I'd edit my answer to support that immediately, so no worry till then :)
– AshuKingSharma
Jul 14 '16 at 9:49
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HTTP requests and JSON parsing in Python
...packages. On the other hand, when portability/compatibility is trivial, in my opinion it's worth it.
– nyuszika7h
Jun 10 '14 at 20:53
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