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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...lexibility in terms of what kind of comparisons are allowed (e.g. changing order of elements of each vector, changing order and names of variables, shortening variables, changing case of strings). From this, you should be able to figure out what was missing from one or the other. For example (this i...
How to set HTTP headers (for cache-control)?
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Is order in this important? "max-age=290304000, public" Or "public, max-age=290304000" or both are equally right?
– Satya Prakash
Sep 8 '13 at 8:02
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What is the difference between named and positional parameters in Dart?
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Because named parameters are referenced by name, they can be used in an order different from their declaration.
getHttpUrl('example.com', '/index.html');
getHttpUrl('example.com', '/index.html', port: 8080);
getHttpUrl('example.com', '/index.html', port: 8080, numRetries: 5);
getHttpUrl('example...
Inverse dictionary lookup in Python
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@BrianJack: Dictionaries are not ordered, like sets. Look at collections.OrderedDict for an implementation that is ordered.
– Martijn Pieters♦
Jul 24 '12 at 14:40
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FormData.append(“key”, “value”) is not working
...il]":"customer@mail.com" => "user":{"email":"customer@mail.com"}
const orderRes = await fetch(`/api/orders`, {
method: 'POST',
credentials: 'same-origin',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(data)
});
cons...
How to increase the vertical split window size in Vim
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Another tip from my side:
In order to set the window's width to let's say exactly 80 columns, use
80 CTRL+W |
In order to set it to maximum width, just omit the preceding number:
CTRL+W |
...
How does the Amazon Recommendation feature work?
...ch an algorithm would probably involve tracking groups of items frequently ordered together, and then using that data to recommend other items in the group when a customer purchases some subset of the group.
Another possibility would be to track the frequency of item B being ordered within N days a...
How can I print literal curly-brace characters in python string and also use .format on it?
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But the order of the keys in a Python object isn't guaranteed... Still, the JSON library is guaranteed to serialise in a JSON way.
– wizzwizz4
Jun 30 '18 at 8:34
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Is it faster to count down than it is to count up?
...o result in any measurable improvement on real programs on a modern out-of-order processor? Highly unlikely. In fact, I'd be impressed if you could show a measurable improvement even on a microbenchmark.
Summary: I smack your teacher upside the head! You shouldn't be learning obsolete pseudo-fac...
When should the volatile keyword be used in C#?
...ly "make sure that the compiler and the
jitter do not perform any code reordering or register caching
optimizations on this variable". It also means "tell the processors to
do whatever it is they need to do to ensure that I am reading the
latest value, even if that means halting other proces...