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Multiple Inheritance in C#
...tract base class that implements both IFirst and ISecond, and then inherit from just that base.
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Rails migration for has_and_belongs_to_many join table
...p columns. Here is a better example of a has_and_belongs_to_many migration from the link you gave. I'm looking for a way to do it from the command line with script/generate migration ...
– ma11hew28
Dec 7 '10 at 20:44
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How to check if a file is a valid image file?
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I have just found the builtin imghdr module. From python documentation:
The imghdr module determines the type
of image contained in a file or byte
stream.
This is how it works:
>>> import imghdr
>>> imghdr.what('/tmp/bass')
'gif'
Using a m...
CSS transition effect makes image blurry / moves image 1px, in Chrome?
...0 update
If you have issues with blurry images, be sure to check answers from below as well, especially the image-rendering CSS property.
For best practice accessibility and SEO wise you could replace the background image with an <img> tag using object-fit CSS property.
Original answer
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Get form data in ReactJS
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There are a few ways to do this:
1) Get values from array of form elements by index
handleSubmit = (event) => {
event.preventDefault();
console.log(event.target[0].value)
}
2) Using name attribute in html
handleSubmit = (event) => {
event.preventDefault();...
How to get StackPanel's children to fill maximum space downward?
...spent the last hour trying to figure out how to get StackPanel to do this. From now on, I'll look here first for my WPF (and other) info.
– paxdiablo
Jun 22 '10 at 15:05
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Best way to iterate through a Perl array
..._ is aliased to the element in #1, but #2 and #3 actually copy the scalars from the array.)
#5 might be similar.
In terms memory usage: They're all the same except for #5.
for (@a) is special-cased to avoid flattening the array. The loop iterates over the indexes of the array.
In terms of readabil...
What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
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From the javadoc:
The serialization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized ...
Python - List of unique dictionaries
... @John La Rooy - how could one use the same to remove dictionarys from a list based on multiple attributes , tried this but seems not to work > {v['flight']['lon']['lat']: v for v in stream}.values()
– Jorge Vidinha
Sep 13 '15 at 10:04
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What is a good regular expression to match a URL? [duplicate]
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These are the droids you're looking for. This is taken from validator.js which is the library you should really use to do this. But if you want to roll your own, who am I to stop you? If you want pure regex then you can just take out the length check. I think it's a good idea ...