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How to use the “required” attribute with a “radio” input field
...buttons they must all have the same name value. This allows only one to be selected at a time and applies required to the whole group.
<form>
Select Gender:<br>
<label>
<input type="radio" name="gender" value="male" required>
Male
</label><b...
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
...urn the ith sequential element of x.
For lists, one generally uses [[ to select any single element, whereas [ returns a list of the selected elements.
The [[ form allows only a single element to be selected using integer or character indices, whereas [ allows indexing by vectors. Note though tha...
What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?
...quires a key (string or algorithm) in order to decrypt; hence the "crypt" (root:cryptography)
Encoding modifies/shifts/changes a character code into another. In this case, usual bytes of data can now be easily represented and transported using HTTP.
...
Merging: Hg/Git vs. SVN
...urial too I suppose) propose the rebase --onto option to rebase (reset the root of the branch) part of a branch:
From Jefromi's post
- x - x - x (v2) - x - x - x (v2.1)
\
x - x - x (v2-only) - x - x - x (wss)
you can untangle this situation where you have patches for the v...
Xcode Command /usr/bin/codesign failed with exit code 1 : errSecInternalComponent
...
Open Keychain Access, then in the File menu select Lock All Keychains.
Then go back to Xcode and clean and rebuild. It will prompt you for your password again to unlock the keychain.
After this, assuming you have no other compile issues, it will succeed!
...
Capybara Ambiguity Resolution
...t
So it's adviced to choose another, less ambiguous locator: for example select element by id, class or other css/xpath locator so that only one element will match it.
As a note here are some locators that I usually consider useful when resolving ambiguity:
find('ul > li:first-child')
It'...
How to create a sequence of integers in C#?
...
Linq projection with the rarely used indexer overload (i):
(new int[11]).Select((o,i) => i)
I prefer this method for its flexibilty.
For example, if I want evens:
(new int[11]).Select((item,i) => i*2)
Or if I want 5 minute increments of an hour:
(new int[12]).Select((item,i) => i*5...
commands not found on zsh
...the file.
After saving the file, change the /bin/zsh in your command or select default
...and restart terminal and you should have your zsh shell working again!
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Why modelVersion of pom.xml is necessary and always set to 4.0.0?
... used a model which contained a 3.0.0 element as an immediate child of the root.
Maven 2.x / 3.x has used a 4.0.0 element.
version - containing the version of the project. If this attribute is missing then the parent element must be present and the version will be inherited from the parent projec...
HTTP Error 404.3 - Not Found" while browsing wcf service on Windows Server 2008(64bit)
...s Server 2012... From the Server Manager, click on Add roles and features, select the appropriate server, then select Features. Under .NET Framework 4.5 Features, you'll see WCF Services, and under that, you'll find HTTP Activation."
...