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listless

[list-lis] /ˈlɪst lɪs/
adjective
1.
having or showing little or no interest in anything; languid; spiritless; indifferent:
a listless mood; a listless handshake.
Origin of listless
late Middle English
1400-1450
1400-50; late Middle English lystles. See list4, -less
Related forms
listlessly, adverb
listlessness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for listless

listless

/ˈlɪstlɪs/
adjective
1.
disinclined for any effort or exertion; lacking vigour, enthusiasm, or energy
Derived Forms
listlessly, adverb
listlessness, noun
Word Origin
C15: from list desire + -less
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for listless
adjective

having no inclination or spirit; characterized by unwillingingness to exert

Word Origin

Middle English list 'desire' + less

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
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Word Origin and History for listless
adj.

mid-15c., from Middle English liste "pleasure, joy, delight" (see list (v.4)) + -less. Related: Listlessly; listlessness.

Online Etymology Dictionary, © 2010 Douglas Harper
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listless in Technology
programming
In functional programming, a property of a function which allows it to be combined with other functions in a way that eliminates intermediate data structures, especially lists.
Phil Wadler's thesis gives the conditions for a function to be in listless form: each input list is traversed only once, one element at a time, from left to right. Each output list is generated once, one element at a time, from left to right. No other lists are generated or traversed.
Not all functions can be expressed in listless form (e.g. reverse).
(1995-02-22)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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8
10
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