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Rails: What's a good way to validate links (URLs)?
...url?(uri)
uri = URI.parse(uri) && uri.host
rescue URI::InvalidURIError
false
end
You can even decide to make it more restrictive. For instance, if you want the URL to be an HTTP/HTTPS URL, then you can make the validation more accurate.
require 'uri'
def valid_url?(url)
uri = URI.par...
Move an array element from one array position to another
I'm having a hard time figuring out how to move an array element. For example, given the following:
31 Answers
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npm - how to show the latest version of a package
How do I use npm to show the latest version of a module? I am expecting something like npm --latest express to print out v3.0.0 .
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Stretch child div height to fill parent that has dynamic height
As it can be seen in the following fiddle, I have two div s, contained in a parent div that have stretched to contain the big div, my goal is to make those child div s equal in height.
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How can I debug my JavaScript code? [closed]
...
+1 opera js debugger gives a better error message then all the rest
– Gabriel Solomon
Jun 15 '09 at 7:10
3
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How to check if Receiver is registered in Android?
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Funny thing is that doesn't catch the error for this call to BroadcastReceiver for registerReceiver(mReceiver, filter1);
– JPM
Mar 2 '12 at 17:10
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Should I commit or rollback a read transaction?
...ppers might consider a rollback in an inner transaction as an sign that an error has occured and rollback everything in the outmost transaction, regardless whether the outmost transaction commited or rolled back.
So a COMMIT is the safe way, when you cannot rule out that your component is used by s...
change type of input field with jQuery
...er's security model.
Edit: indeed, testing right now in Safari, I get the error type property cannot be changed.
Edit 2: that seems to be an error straight out of jQuery. Using the following straight DOM code works just fine:
var pass = document.createElement('input');
pass.type = 'password';
doc...
error: passing xxx as 'this' argument of xxx discards qualifiers
...he object is const; so any attempt to modify the const object should be an error. Hence compiler generates an error message.
The solution is simple: make the functions const as:
int getId() const {
return id;
}
string getName() const {
return name;
}
This is necessary because now you ca...
Can I initialize a C# attribute with an array or other variable number of arguments?
Is it possible to create an attribute that can be initialized with a variable number of arguments?
7 Answers
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