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How to design a database for User Defined Fields?
...clarative
referential
integrity is rarely out-performed by
trigger-based or application level
constraint enforcement.
Cons:
This could create a lot of tables.
Enforcing schema separation and/or a
naming convention would alleviate
this.
There is more application code
needed to operate...
Am I immoral for using a variable name that differs from its type only by case?
...et tripped up by being unable to discern between types and their instances based on this naming convention.
– Andrew Hare
Sep 14 '09 at 18:19
2
...
Select parent element of known element in Selenium
...Close</span>
</a>
Now that you need to select parent tag 'a' based on <span> text, then use
driver.findElement(By.xpath("//a[.//span[text()='Close']]"));
Explanation: Select the node based on its child node's value
...
How do I know the script file name in a Bash script?
...
me=`basename "$0"`
For reading through a symlink1, which is usually not what you want (you usually don't want to confuse the user this way), try:
me="$(basename "$(test -L "$0" && readlink "$0" || echo "$0")")"
IMO, ...
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
I'm working on getting my database to talk to my Java programs.
38 Answers
38
...
How can I convert a comma-separated string to an array?
...e you have elements in array, if you're expecting data from a server / database you will run into trouble since ''.split(',') has a length === 1 IE: ''.split(',') === ['']
– oportocala
Aug 2 '16 at 15:49
...
When should I use RequestFactory vs GWT-RPC?
...ic, non-GWT-compatible, code inside your class. Because the RPC system is based on having the same concrete type on both the client and the server, you can hit a complexity wall based on the capabilities of your GWT client.
To get around the use of incompatible code, many users wind up creating a ...
When to use , tag files, composite components and/or custom components?
...hnically, the performance concern is negligible. The choice should be made based on the concrete functional requirements and the final degree of abstraction, reusability and maintainability of the implementation. Each approach has its own well definied purpose and limitations.
Composite components d...
git: fatal: Could not read from remote repository
...ccess.
Also it's possible to define rules for ssh in ~/.ssh/config, e.g. based on aliases:
Host github
HostName github.com
User git
IdentityFile "~/.ssh/id_rsa"
Host git
HostName github.com
User git
IdentityFile "~/.ssh/some_other_id"
You can set con...
How do BitTorrent magnet links work?
...nd is followed by the format ( btih in this case) with a SHA1 hash. I saw base32 mentioned, knowing it's 5 bits per character and 32 characters, I found it holds exactly 160bits, which is exactly the size of the SHA1.
...