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How do I pick randomly from an array?
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1140
Just use Array#sample:
[:foo, :bar].sample # => :foo, or :bar :-)
It is available in Ru...
How to get whole and decimal part of a number?
Given, say, 1.25 - how do I get "1" and ."25" parts of this number?
16 Answers
16
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Extract first item of each sublist
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201
Using list comprehension:
>>> lst = [['a','b','c'], [1,2,3], ['x','y','z']]
>>&g...
What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...ic sort compares the numbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9.
See http://www.gnu.org/software/coreutils/manual/h...
Algorithm to calculate the number of divisors of a given number
...ivisor is repeated)
then the total count for all of the divisors is:
(x + 1) * (y + 1) * (z + 1).
Edit: BTW, to find a,b,c,etc you'll want to do what amounts to a greedy algo if I'm understanding this correctly. Start with your largest prime divisor and multiply it by itself until a further multip...
How to select only 1 row from oracle sql?
I want to use oracle syntax to select only 1 row from table DUAL . For example, I want to execute this query:
13 Answers
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deleting rows in numpy array
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157
The simplest way to delete rows and columns from arrays is the numpy.delete method.
Suppose I...
通信连接组件 · App Inventor 2 中文网
...并后跟类名。
例如：main=com.gmail.Bitdiddle.Ben.HelloPurr.Screen1（第一个组件表明它是由 Ben.Bitdiddle@gmail.com 创建）要让您的 Activity启动器 启动此应用程序，设置以下属性：
ActivityPackage 到类名，删除最后一个组件（例如： com.gm...
Access multiple elements of list knowing their index
...t say I would like to create a new list, which contains element with index 1, 2, 5, from given list [-2, 1, 5, 3, 8, 5, 6]. What I did is:
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LAST_INSERT_ID() MySQL
... think must be quite easy. I need to return the LAST INSERTED ID from table1 when I run the following MySql query:
11 Answe...