ContainsNone

ContainsNone[e1,e2]

yields True if e1 contains none of the elements in e2.

ContainsNone[e2]

is an operator form that yields True when the object to which it is applied contains none of the elements of e2.

Examples

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Basic Examples  (2)

The first list contains none of the elements of the second list:

The first list contains elements of the second list:

Scope  (5)

There are English words containing none of the five vowels:

Use ContainsNone in operator form:

Select music works:

Find the movies directed by Pedro Almodóvar whose cast includes none of several actors:

ContainsNone works with associations:

Options  (2)

SameTest  (2)

By default, ContainsNone considers elements to be the same if they are identical:

Changes of units are taken into account, as long as they represent the exact same quantity:

Numerical approximations are not considered as the same object:

Use Equal as the comparison function to have numerical tolerance:

String comparisons are case sensitive by default:

Convert to lower case before comparing:

Applications  (2)

Take the list of words in this text:

That list of words does not contain any of these:

However, that is not true if "rabbit" is added:

A lipogram is a text that does not use a given letter:

Find the longest English word that does not contain the letter e:

Properties & Relations  (5)

ContainsNone[list1,list2] is equivalent to testing for empty intersection of the lists:

ContainsNone[list1,list2] is equivalent to DisjointQ[list1,list2]:

ContainsNone is a symmetric function of its arguments. That is, ContainsNone[list1,list2]==ContainsNone[list2,list1]:

Negation of ContainsNone[list1,list2] is equivalent to ContainsAny[list1,list2]:

ContainsNone[list,{}] always returns True:

Wolfram Research (2015), ContainsNone, Wolfram Language function, https://reference.wolfram.com/language/ref/ContainsNone.html.

Text

Wolfram Research (2015), ContainsNone, Wolfram Language function, https://reference.wolfram.com/language/ref/ContainsNone.html.

CMS

Wolfram Language. 2015. "ContainsNone." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ContainsNone.html.

APA

Wolfram Language. (2015). ContainsNone. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ContainsNone.html

BibTeX

@misc{reference.wolfram_2023_containsnone, author="Wolfram Research", title="{ContainsNone}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/ContainsNone.html}", note=[Accessed: 01-October-2023 ]}

BibLaTeX

@online{reference.wolfram_2023_containsnone, organization={Wolfram Research}, title={ContainsNone}, year={2015}, url={https://reference.wolfram.com/language/ref/ContainsNone.html}, note=[Accessed: 01-October-2023 ]}