Problem 583. Implement a counter

Created by David Hruska

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Write a function that returns a function that counts the number of times it is invoked. Example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[>> h = counter;\n>> h()\nans =\n     1\n>> h()\nans =\n     2\n>> h()\nans =\n     3]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Note: your solution</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>cannot</w:t></w:r><w:r><w:t> use persistent variables.</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

437 Solutions
80 Solvers

Last Solution submitted on Dec 26, 2020

Last 200 Solutions

Problem Comments

Solution Comments

Solution 2827209

1 Comment

1 Comment

Rafael S.T. Vieira on 13 Aug 2020

Just fixed the code from another player, which had an interesting solution.

Solution 77053

1 Comment

1 Comment

Aurelien Queffurust on 16 Apr 2012

solution which does not use any nested function ;)

Problem Recent Solvers80

Problem Tags

function handles

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 583. Implement a counter

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers80

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Problem 583. Implement a counter

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers80

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Players