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How do I compute derivative using Numpy?
...**2 + 1
def d_fun(x):
h = 1e-5
return (fun(x+h)-fun(x-h))/(2*h)
Now, you can numerically find the derivative at x=5:
In [1]: d_fun(5)
Out[1]: 9.999999999621423
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Open an IO stream from a local file or url
I know there are libs in other languages that can take a string that contains either a path to a local file or a url and open it as a readable IO stream.
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Force Intellij IDEA to reread all maven dependencies
... @Winnemucca I just did it on 2017.2. Waiting for it to finish now.
– mrClean
Aug 3 '17 at 16:49
1
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Query for documents where array size is greater than 1
...
There's a more efficient way to do this in MongoDB 2.2+ now that you can use numeric array indexes in query object keys.
// Find all docs that have at least two name array elements.
db.accommodations.find({'name.1': {$exists: true}})
You can support this query with an index tha...
Collect successive pairs from a stream
...r;
return pair;
}
}).skip(1); // drop first null
Now you can limit your stream to the length you want
pairStream.limit(1_000_000).forEach(i -> System.out.println(i));
P.S. I hope there is better solution, something like clojure (partition 2 1 stream)
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ASP.NET MVC - passing parameters to the controller
...en limit the number of decimals, like this: new { firstItem = @"\d{4}" } - now it can only be 4 numbers long. Edit: example of fully modified MapRoute: jsfiddle.net/HJRgT
– KristianB
Sep 18 '11 at 16:57
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Make a DIV fill an entire table cell
...on and googled a bit , but nothing so far has worked. I figure it's 2010 now (those questions/answers are old and, well, unanswered) and we have CSS3! Is there any way to get a div to fill an entire table cell's width and height using CSS?
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Insert Update trigger how to determine if insert or update
... I was creating separate Triggers for insert ,update and delete .Now its great to know they can be combined !
– UJS
Nov 16 '17 at 6:12
2
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Passing variable arguments to another function that accepts a variable argument list
...a va_list, but that function (or one that it calls) must have some way of knowing what's in the va_list.
– Jonathan Leffler
Feb 14 at 20:18
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How to prettyprint a JSON file?
...k in 2015 when I created this example image. It doesn't seem to be working now on my system as well.
– Shubham Chaudhary
Jan 30 '18 at 9:19
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