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PostgreSQL function for last inserted ID
...an id column created with the SERIAL pseudo-type. To avoid relying on this and to feel more clean, you can use instead pg_get_serial_sequence:
INSERT INTO persons (lastname,firstname) VALUES ('Smith', 'John');
SELECT currval(pg_get_serial_sequence('persons','id'));
Caveat: currval() only work...
Make HTML5 video poster be same size as video itself
...ieve this (example); however, to have a background stretched to the height and the width of a video, you'll have to use an absolutely positioned <img> tag (example).
It is also possible to set background-size to 100% 100% in browsers that support background-size (example).
Update
A better wa...
Clustered vs Non-Clustered
My lower level knowledge of SQL (Server 2008) is limited, and is now being challanged by our DBAs. Let me explain (I have mentioned obvious statements in the hope that I am right, but if you see something wrong, please tell me) the scenario:
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Android: How can I get the current foreground activity (from a service)?
Is there a native android way to get a reference to the currently running Activity from a service?
12 Answers
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What is the best way to filter a Java Collection?
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Java 8 (2014) solves this problem using streams and lambdas in one line of code:
List<Person> beerDrinkers = persons.stream()
.filter(p -> p.getAge() > 16).collect(Collectors.toList());
Here's a tutorial.
Use Collection#removeIf to modify the collection...
NoSql vs Relational database
...nal. For those situations, NoSQL can be helpful.
With that said, NoSQL stands for "Not Only SQL". It's not intended to knock SQL or supplant it.
SQL has several very big advantages:
Strong mathematical basis.
Declarative syntax.
A well-known language in Structured Query Language (SQL).
Th...
How can I make a jQuery UI 'draggable()' div draggable for touchscreen?
I have a jQuery UI draggable() that works in Firefox and Chrome. The user interface concept is basically click to create a "post-it" type item.
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Create directories using make file
I'm a very new to makefiles and i want to create directories using makefile. My project directory is like this
9 Answers
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How to create a unique index on a NULL column?
...f uniques" -- NULL is a special value in SQL (similar in many ways to NaN) and needs to be treated accordingly. It's actually a failure in in SQL Server to honor various SQL specifications: here is a link for a request for the "correct implementation" for what it is worth: connect.microsoft.com/SQLS...
How to make an input type=button act like a hyperlink and redirect using a get request? [duplicate]
How do I make a <input type=button> act like a hyperlink and redirect using a GET request?
6 Answers
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