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In Django, how does one filter a QuerySet with dynamic field lookups?
...nt expansion may be used to solve this problem:
kwargs = {
'{0}__{1}'.format('name', 'startswith'): 'A',
'{0}__{1}'.format('name', 'endswith'): 'Z'
}
Person.objects.filter(**kwargs)
This is a very common and useful Python idiom.
...
How to detect input type=file “change” for the same file?
...er clicks on field. This ensures that the onChange event will be triggered for the same file as well. Worked for me :)
onInputClick = (event) => {
event.target.value = ''
}
<input type="file" onChange={onFileChanged} onClick={onInputClick} />
Using TypeScript
onInputClick = ( even...
Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
... above worked, but only after I redirected my gcc. export CC=/usr/bin/gcc For more info: here is the github issue from rbenv that helped
– Dan Williams
Oct 20 '14 at 22:10
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How to enable external request in IIS Express?
...ative prompt:
netsh http add urlacl url=http://vaidesg:8080/ user=everyone
For XP, first install Windows XP Service Pack 2 Support Tools. Then run the following command from an administrative prompt:
httpcfg set urlacl /u http://vaidesg1:8080/ /a D:(A;;GX;;;WD)
...
Check if object is a jQuery object
... outer namespace (where $ is jQuery1) than I have no way to use instanceof for checking if this object is a jQuery object.
– Georgii Ivankin
Apr 11 '14 at 4:00
6
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How to generate .json file with PHP?
...write($fp, json_encode($response,JSON_PRETTY_PRINT)); - uses whitespace to format the JSON. Other constants here
– Andrei Krasutski
Jan 8 '18 at 9:12
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What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
...your tables use the InnoDB engine. In that case you would have to drop the foreign key, and then do the alter table and drop the column.
But the tricky part is that you can't drop the foreign key using the column name, but instead you would have to find the name used to index it. To find that, issu...
DTO = ViewModel?
...oggle view elements etc...). You can look at the viewmodel as all the data for a view plus behaviors. ViewModels may or may not map one to one to business objects or DTOs.
By the way, NHibernate projections come in handy if a certain viewmodel needs a subset of the data from a persisted object.
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How to find where a method is defined at runtime?
...this from Dave Thomas while teaching Advanced Ruby Studio
# Makes the case for separating method definitions into
# modules, especially when enhancing built-in classes.
module Perpetrator
def crime
end
end
class Fixnum
include Perpetrator
end
p 2.method(:crime) # The "2" here is an instance ...
How do I remove an array item in TypeScript?
...his simple case, it can help you diagnose bugs faster if you define a type for every variable explicitly. You're using index in more than once place already and one of those places (splice) wants to see a number or you'll get an error. Currently the compiler can't prevent you making mistakes there.
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