TakeSmallestBy

TakeSmallestBy[list,f,n]

gives the n elements ei in list for which f[ei] is smallest, sorted in ascending order.

TakeSmallestBy[listprop,f,n]

gives the property prop for the n elements in list for which f[ei] is smallest.

TakeSmallestBy[f,n]

represents an operator form of TakeSmallestBy that can be applied to an expression.

Details and Options

Examples

open allclose all

Basic Examples  (3)

Take the two shortest strings in a list:

Do the same using the operator form of TakeSmallestBy:

Take the two longest strings in an association:

Give the four numbers closest to zero:

Give the 4 numbers closest to zero, or as many as are available if fewer:

Scope  (3)

Get the two smallest elements by magnitude in a list:

Get the positions of the two smallest elements by magnitude in a list:

Get the two smallest elements by magnitude in a list along with their positions:

Get the two smallest elements by magnitude in a list with their positions given first:

Get associations containing the element and position of the two smallest elements by magnitude in a list:

Find the 10 countries whose names have the lowest total of letter numbers:

Possible Issues  (2)

If fewer than the requested number of elements are present, TakeSmallestBy will not evaluate:

If the f[ei] are not comparable, TakeSmallestBy will not evaluate:

Neat Examples  (1)

From the BRICS group of countries, give the country that is closest to the current location:

Introduced in 2015
 (10.1)
 |
Updated in 2019
 (12.0)