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Add a column to a table, if it does not already exist
I want to write a query for MS SQL Server that adds a column into a table. But I don't want any error display, when I run/execute the following query.
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Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?
I want to create a database which does not exist through JDBC. Unlike MySQL, PostgreSQL does not support create if not exists syntax. What is the best way to accomplish this?
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Add new attribute (element) to JSON object using JavaScript
How do I add new attribute (element) to JSON object using JavaScript?
10 Answers
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How to navigate a few folders up?
One option would be to do System.IO.Directory.GetParent() a few times. Is there a more graceful way of travelling a few folders up from where the executing assembly resides?
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How can you make a custom keyboard in Android?
I want to make a custom keyboard. I don't know how to do it using XML and Java. The following picture is a model of the keyboard I want to make. It only needs numbers.
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How do I get the directory from a file's full path?
What is the simplest way to get the directory that a file is in? I'm using this to set a working directory.
12 Answers
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How to make ng-repeat filter out duplicate results
I'm running a simple ng-repeat over a JSON file and want to get category names. There are about 100 objects, each belonging to a category - but there are only about 6 categories.
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Should I use the Reply-To header when sending emails as a service to others?
Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers.
3 Answers
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Assign multiple columns using := in data.table, by group
What is the best way to assign to multiple columns using data.table ? For example:
2 Answers
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Git hangs while writing objects
I'm trying to git push -u origin master And it just hangs at
9 Answers
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