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How to find all occurrences of an element in a list?
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While not a solution for lists directly, numpy really shines for this sort of thing:
import nu...
How to find my Subversion server version number?
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211
To find the version of the subversion REPOSITORY you can:
Look to the repository on the web ...
Mapping a function on the values of a map in Clojure
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answered Nov 5 '09 at 2:16
Brian CarperBrian Carper
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Calculating distance between two points, using latitude longitude?
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219
The Java code given by Dommer above gives slightly incorrect results but the small errors add ...
How to split a sequence into two pieces by predicate?
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By using partition method:
scala> List(1,2,3,4).partition(x => x % 2 == 0)
res0: (List[Int], List[Int]) = (List(2, 4),List(1, 3))
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Oracle “(+)” Operator
...s) didn't standardize OUTER joins.
The query would be re-written in ANSI-92 syntax as:
SELECT ...
FROM a
LEFT JOIN b ON b.id = a.id
This link is pretty good at explaining the difference between JOINs.
It should also be noted that even though the (+) works, Oracle recommends not using ...
Batch file. Delete all files and folders in a directory
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edited May 23 '14 at 12:51
DontVoteMeDown
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How to read data From *.CSV file using javascript?
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NOTE: I concocted this solution before I was reminded about all the "special cases" that can oc...
How to count the number of set bits in a 32-bit integer?
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App Inventor 2 数学积木的9个隐藏用法：随机种子、位运算、取整陷阱，踩中...
...制、0o 前缀写八进制。比如 0b1010 直接就是 10，0xFF 就是 255。
更方便的是「进制数字块」，点开下拉菜单直接切二进制/八进制/十进制/十六进制输入模式，写 IoT 通信协议或处理硬件返回值时特别顺手。
技巧2：random set seed ...