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Validate uniqueness of multiple columns
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321
You can scope a validates_uniqueness_of call as follows.
validates_uniqueness_of :user_id, :s...
Django template how to look up a dictionary value with a variable
...ctionary value in a Django template is {{ mydict.key1 }} , {{ mydict.key2 }} . What if the key is a loop variable? ie:
8...
How do you explicitly set a new property on `window` in TypeScript?
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22 Answers
22
Active
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Testing modules in rspec
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221
The rad way =>
let(:dummy_class) { Class.new { include ModuleToBeTested } }
Alternativel...
Iterate a list as pair (current, next) in Python
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132
Here's a relevant example from the itertools module docs:
import itertools
def pairwise(iterabl...
Version vs build in Xcode
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1237
Apple sort of rearranged/repurposed the fields.
Going forward, if you look on the Info tab f...
How do I create directory if it doesn't exist to create a file?
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edited Nov 20 '18 at 9:59
BKSpurgeon
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SQLAlchemy IN clause
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How about
session.query(MyUserClass).filter(MyUserClass.id.in_((123,456))).all()
edit: Without the ORM, it would be
session.execute(
select(
[MyUserTable.c.id, MyUserTable.c.name],
MyUserTable.c.id.in_((123, 456))
)
).fetchall()
select() takes two parameters,...
Can I change the fill color of an svg path with CSS?
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225
Yes, you can apply CSS to SVG, but you need to match the element, just as when styling HTML. ...
Append integer to beginning of list in Python [duplicate]
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>>>var=7
>>>array = [1,2,3,4,5,6]
>>>array.insert(0,var)
>>>array
[7, 1, 2, 3, 4, 5, 6]
How it works:
array.insert(index, value)
Insert an item at a given position. The first argument is the index of the element before which t...