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Rails: how do I validate that something is a boolean?
...ield (the field would not be valid for a false value). But in both Rails 3 and 4, having validates :field, inclusion: [true, false] would test for inclusion in a list of values, with the side-effect to test for the field's presence (unless one of those values is nil of course).
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How to conditionally push an item in an observable array?
...itemToAdd);
}
If the two are not actually a reference to the same object and you want to run custom comparison logic, then you can use ko.utils.arrayFirst like:
var match = ko.utils.arrayFirst(myObservableArray(), function(item) {
return itemToAdd.id === item.id;
});
if (!match) {
myObserv...
In Unix, can I run 'make' in a directory without cd'ing to that directory first?
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Grump - that isn't in standard make; it must be a GNU extension. Since you say Linux and Unix, it isn't clear which you want, but the -C option won't work on Solaris 10 (/usr/ccs/bin/make), AIX (/usr/bin/make), or HP-UX 11.23 (/usr/bin/make). Stil...
type object 'datetime.datetime' has no attribute 'datetime'
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Datetime is a module that allows for handling of dates, times and datetimes (all of which are datatypes). This means that datetime is both a top-level module as well as being a type within that module. This is confusing.
Your error is probably based on the confu...
Using jQuery how to get click coordinates on the target element
I have the following event handler for my html element
6 Answers
6
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How to set session timeout in web.config
...ibute specifies the number of minutes a session can be idle before it is abandoned. The default value for this attribute is 20.
By assigning a value of 1 to this attribute, you've set the session to be abandoned in 1 minute after its idle.
To test this, create a simple aspx page, and write this co...
Django DB Settings 'Improperly Configured' Error
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You can't just fire up Python and check things, Django doesn't know what project you want to work on. You have to do one of these things:
Use python manage.py shell
Use django-admin.py shell --settings=mysite.settings (or whatever settings module you us...
Unlink of file failed
I'm trying to do a git pull and I get the following error:
17 Answers
17
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LINQ Distinct operator, ignore case?
...ls answer if you want the most concise approach]
After some investigation and good feedback from Bradley Grainger I've implemented the following IEqualityComparer. It suports a case insensitive Distinct() statement (just pass an instance of this to the Distinct operator) :
class IgnoreCaseCompar...
What's the difference between compiled and interpreted language?
...subject I'm still not sure what the difference between a compiled language and an interpreted language is. I was told this is one of the differences between Java and JavaScript. Would someone please help me in understanding it?
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