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In Python, how do I index a list with another list?
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answered Jun 18 '09 at 11:38
vanvan
56.4k99 gold badges129129 silver badges140140 bronze badges
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How to use the PI constant in C++
...a:
M_PI
In my math.h (2014) it is defined as:
# define M_PI 3.14159265358979323846 /* pi */
but check your math.h for more. An extract from the "old" math.h (in 2009):
/* Define _USE_MATH_DEFINES before including math.h to expose these macro
* definitions for common math constant...
How do you detect where two line segments intersect? [closed]
...ntersect.
Credit: this method is the 2-dimensional specialization of the 3D line intersection algorithm from the article "Intersection of two lines in three-space" by Ronald Goldman, published in Graphics Gems, page 304. In three dimensions, the usual case is that the lines are skew (neither paral...
Find object in list that has attribute equal to some value (that meets any condition)
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Tropicalrambler
16333 silver badges1313 bronze badges
answered Aug 19 '11 at 18:01
agfagf
140k32...
SQlite Getting nearest locations (with latitude and longitude)
...od calculateDerivedPosition(...) calculates those points for you (p1, p2, p3, p4 in picture).
/**
* Calculates the end-point from a given source at a given range (meters)
* and bearing (degrees). This methods uses simple geometry equations to
* calculate the end-point.
*
* @param point
* ...
C++0x has no semaphores? How to synchronize threads?
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edited Sep 13 '18 at 15:00
answered Jan 25 '11 at 12:45
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Dynamic variable names in Bash
...[$1]}
}
If you can't use associative arrays (e.g., you must support bash 3), you can use declare to create dynamic variable names:
declare "magic_variable_$1=$(ls | tail -1)"
and use indirect parameter expansion to access the value.
var="magic_variable_$1"
echo "${!var}"
See BashFAQ: Indirec...
Iterate two Lists or Arrays with one ForEach statement in C#
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283
This is known as a Zip operation and will be supported in .NET 4.
With that, you would be able ...
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
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3 Answers
3
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Reverse colormap in matplotlib
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edited Nov 1 '14 at 5:13
answered Jul 19 '10 at 11:45
pt...