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Is there a concise way to iterate over a stream with indices in Java 8?
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The cleanest way is to start from a stream of indices:
String[] names = {"Sam", "Pamela", "Dave", "Pascal", "Erik"};
IntStream.range(0, names.length)
.filter(i -> names[i].length() <= i)
.mapToObj(i -> names[i])
.coll...
Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...age to get some default time zones, or directly subclass tzinfo yourself:
from datetime import datetime, tzinfo, timedelta
class simple_utc(tzinfo):
def tzname(self,**kwargs):
return "UTC"
def utcoffset(self, dt):
return timedelta(0)
Then you can manually add the time zone...
Why do results vary based on curly brace placement?
Why do the code snippets below, taken from this article , produce different results due to only a single change in the placement of curly braces?
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What does !important mean in CSS?
...ens. And the neighbourhood.
It also makes debugging your CSS a nightmare (from personal, empirical, experience).
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Getting LaTeX into R Plots
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As stolen from here, the following command correctly uses LaTeX to draw the title:
plot(1, main=expression(beta[1]))
See ?plotmath for more details.
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how to set “camera position” for 3d plots using python/matplotlib?
...using the mouse when using matplotlib interactively. But how can I do this from a script?
I found a lot of transforms in mpl_toolkits.mplot3d.proj3d but I could not find out how to use these for my purpose and I didn't find any example for what I'm trying to do.
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Functional design patterns [closed]
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My suggestion is, if you want to learn Scala, to read the book from Paul Chiusano and Runar Bjarnason:
http://manning.com/bjarnason/
Part II: Functional design and combinator libraries
Making little languages
JSON serialization
Specification-based testing
Parsers
Purely functio...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...nge and when it noticed the state of the object had changed, it removed it from the collection of objects in the previous state and moved it into the collection of objects in the new state. The remove operation destroyed the last shared pointer to the object. The member function had been called on a...
How come a non-const reference cannot bind to a temporary object?
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From this Visual C++ blog article about rvalue references:
... C++ doesn't want you to accidentally
modify temporaries, but directly
calling a non-const member function on
a modifiable rvalue is explicit, so
it's ...
Understanding recursion [closed]
...h, and two simple return statements that almost wrote themsleves, directly from our specification?
How to sum a node:
If a node is null
its sum is zero
otherwise
its sum is its value
plus the sum of its left child node
plus the sum of its right child node
That's the power of recu...