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Update or Insert (multiple rows and columns) from subquery in PostgreSQL
I'm trying to do something like this in postgres:
3 Answers
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With GitHub how do I push all branches when adding an existing repo?
I created a new GitHub repo - I want to put my existing repo there.
I followed the instructions:
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how to get first three characters of an NSString?
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mystr=[mystr substringToIndex:3];
Be sure your string has atleast 3 ch.. o.e. it will crash the app.
Here are some other links to check NSsting operations...
Link1
Link2
Apple Link
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Play a Sound with Python [duplicate]
... Dandreta http://mail.python.org/pipermail/python-list/2004-October/288905.html)
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How do I iterate through the files in a directory in Java?
...so https://docs.oracle.com/javase/7/docs/api/java/nio/file/DirectoryStream.html
Example taken from the Javadoc:
List<Path> listSourceFiles(Path dir) throws IOException {
List<Path> result = new ArrayList<>();
try (DirectoryStream<Path> stream = Files.newDirectoryStrea...
Setting the Vim background colors
When I try to change the background colors in .vimrc or directly in Vim using the command:
4 Answers
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Does running git init twice initialize a repository or reinitialize an existing repo?
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From the git docs:
Running git init in an existing repository is safe. It will not overwrite things that are already there. The primary reason for rerunning git init is to pick up newly added templates.
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Symbol for any number of any characters in regex?
I'm wondering is there a symbol for any number (including zero) of any characters
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How do I specify unique constraint for multiple columns in MySQL?
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I have a MySQL table:
CREATE TABLE `content_html` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`id_box_elements` int(11) DEFAULT NULL,
`id_router` int(11) DEFAULT NULL,
`content` mediumtext COLLATE utf8_czech_ci NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `id_box_e...