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MySQL error: key specification without a key length
I have a table with a primary key that is a varchar(255). Some cases have arisen where 255 characters isn't enough. I tried changing the field to a text, but I get the following error:
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Is there a way to get the XPath in Google Chrome?
I have a webpage I want to use with YQL. But I need the XPath of a specific item. I can see it in the debug tools area for Google Chrome but I don't see a way to copy that XPath.
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How can you search Google Programmatically Java API [closed]
Does anyone know if and how it is possible to search Google programmatically - especially if there is a Java API for it?
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How safe is it to store sessions with Redis?
I'm currently using MySql to store my sessions. It works great, but it is a bit slow.
3 Answers
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Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...cate.
These are common reasons that can cause that:
Trying to connect with the wrong key. Are you sure this instance is using this keypair?
Trying to connect with the wrong username. ubuntu is the username for the ubuntu based AWS distribution, but on some others it's ec2-user (or admin on some ...
What is the difference between trie and radix trie data structures?
...adix tree is a compressed version of a trie. In a trie, on each edge you write a single letter, while in a PATRICIA tree (or radix tree) you store whole words.
Now, assume you have the words hello, hat and have. To store them in a trie, it would look like:
e - l - l - o
/
h - a - t
\
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What is the difference between NaN and None?
...d nan is assigned. Surely None is more descriptive of an empty cell as it has a null value, whereas nan just says that the value read is not a number.
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Linux how to copy but not overwrite? [closed]
I want to cp a directory but I do not want to overwrite any existing files even it they are older than the copied files. And I want to do it completely noninteractive as this will be a part of a Crontab Bash script. Any ideas?
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jQuery AJAX file upload PHP
I want to implement a simple file upload in my intranet-page, with the smallest setup possible.
6 Answers
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Difference between “include” and “require” in php
... using one over the other produce any advantages? Which is better for security?
6 Answers
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