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Generate a random point within a circle (uniformly)
...) * sin(angle)
This will give you uniform point distribution on a disk.
http://mathworld.wolfram.com/DiskPointPicking.html
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How can I pretty-print JSON in a shell script?
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if the JSON is from an internet source such as an API, you can use
curl http://my_url/ | python -m json.tool
For convenience in all of these cases you can make an alias:
alias prettyjson='python -m json.tool'
For even more convenience with a bit more typing to get it ready:
prettyjson_s()...
Wrap a delegate in an IEqualityComparer
Several Linq.Enumerable functions take an IEqualityComparer<T> . Is there a convenient wrapper class that adapts a delegate(T,T)=>bool to implement IEqualityComparer<T> ? It's easy enough to write one (if your ignore problems with defining a correct hashcode), but I'd like to know...
Get Android .apk file VersionName or VersionCode WITHOUT installing apk
...lagged for upgrade/installation.
#/system/bin/sh
SERVER_LIST=$(wget -qO- "http://demo.server.com/apk/" | grep 'href' | grep '\.apk' | sed 's/.*href="//' | \
sed 's/".*//' | grep -v '\/' | sed -E "s/%/\\\\x/g" | sed -e "s/x20/ /g" -e "s/\\\\//g")
LOCAL_LIST=$(for APP in $(pm list packa...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
boost Composite keysComposite keysIn relational databases, composite keys depend on two or more fields of a given table The analogous concept in Boost MultiIndex is Composite keys
In relational databases, composite keys depend on two or more fields of a given table. The analogous concept in Boos...
LINQ Select Distinct with Anonymous Types
So I have a collection of objects. The exact type isn't important. From it I want to extract all the unique pairs of a pair of particular properties, thusly:
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Why does find -exec mv {} ./target/ + not work?
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Fixed size queue which automatically dequeues old values upon new enques
I'm using ConcurrentQueue for a shared data structure which purpose is holding the last N objects passed to it (kind of history).
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LINQ Using Max() to select a single row
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How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
(Note: This question is about not having to specify the number of elements and still allow nested types to be directly initialized.)
This question discusses the uses left for a C array like int arr[20]; . On his answer , @James Kanze shows one of the last strongholds of C arrays, it's unique i...