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How to add an auto-incrementing primary key to an existing table, in PostgreSQL?
... have a table with existing data. Is there a way to add a primary key without deleting and re-creating the table?
4 Answers...
What is the Scala annotation to ensure a tail recursive function is optimized?
I think there is @tailrec annotation to ensure the compiler will optimize a tail recursive function. Do you just put it in front of the declaration? Does it also work if Scala is used in scripting mode (for instance using :load <file> under REPL)?
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How can I get all constants of a type by reflection?
How can I get all constants of any type using reflection?
4 Answers
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How to set standard encoding in Visual Studio
I am searching for a way to setup Visual Studio so it always saves my files in UTF-8.
4 Answers
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How do you use the Immediate Window in Visual Studio?
The Immediate Window is an immensely useful tool for debugging applications. It can be used to execute code statements that are valid in the context of a break point and inspect values. I also use it to type code snippets to learn language features.
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
I'm working on my usual projects on Eclipse, it's a J2EE application, made with Spring, Hibernate and so on. I'm using Tomcat 7 for this (no particular reason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out li...
BigDecimal - to use new or valueOf
I came across two ways of getting BigDecimal object out of a double d.
3 Answers
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What is the effect of encoding an image in base64?
...ng) to base64, then will it be bigger, or will it have the same size? How much greater will it be?
6 Answers
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Angularjs $q.all
I have implemented the $q.all in angularjs, but I can not make the code work. Here is my code :
3 Answers
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MySql: Tinyint (2) vs tinyint(1) - what is the difference?
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It means display width
Whether you use tinyint(1) or tinyint(2), it does not make any difference.
I always use tinyint(1) and int(11), I used several mysql clients (navicat, sequel pro).
It does not mean anything AT ALL! I ran a test, all above clients or ...