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MySQL: Insert record if not exists in table
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I'm not actually suggesting that you do this, as the UNIQUE index as suggested by Piskvor and others is a far better way to do it, but you can actually do what you were attempting:
CREATE TABLE `table_listnames` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(255) NOT NULL...
What is git actually doing when it says it is “resolving deltas”?
...t will compress all the "loose" files into a packfile to save space and an index file into that packfile will be created. So zlib will compress with its own delta algorithm but Git does use delta-encoding to store prior versions. Since the most common and frequent access is the latest version, tha...
How long does it take for GitHub page to show changes after changing index.html
...824%2fhow-long-does-it-take-for-github-page-to-show-changes-after-changing-index-html%23new-answer', 'question_page');
}
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Can not connect to local PostgreSQL
...e and suddenly it was like that already. >_<
– index
May 14 '13 at 7:13
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the trick for me ...
Signed to unsigned conversion in C - is it always safe?
... hint. You don't want to cast to an unsigned and then use that as an array index.
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How do servlets work? Instantiation, sessions, shared variables and multithreading
... servlet container (like Apache Tomcat) starts up, it will deploy and load all its web applications. When a web application is loaded, the servlet container creates the ServletContext once and keeps it in the server's memory. The web app's web.xml and all of included web-fragment.xml files is parsed...
How to delete an item in a list if it exists?
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If index doesn't find the searched string, it throws the ValueError you're seeing. Either
catch the ValueError:
try:
i = s.index("")
del s[i]
except ValueError:
print "new_tag_list has no empty string"
or use fin...
How do I check to see if a value is an integer in MySQL?
...ay to check to see if a value is an integer? Something like is_int() in PHP is what I am looking for.
11 Answers
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Index (zero based) must be greater than or equal to zero
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String.Format must start with zero index "{0}" like this:
Aboutme.Text = String.Format("{0}", reader.GetString(0));
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
...hink that TryGetValue is still more efficient since the get and set of the indexer property is used, isn't it?
– Tim Schmelter
Oct 1 '15 at 10:44
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