{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-05-26T00:16:20.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-05-26T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":541,"title":"Use of regexp","description":"Given a string, containing several sentences, such as:\r\n\r\n 'I played piano. John played football. Anita went home. Are you safe?'\r\n\r\noutput all the matched sentences that begin and end with vowels: \r\n\r\n {'I played piano.','Anita went home.','Are you safe?'} \r\n\r\nOnly accept AEIOU/aeiou as vowels.","description_html":"\u003cp\u003eGiven a string, containing several sentences, such as:\u003c/p\u003e\u003cpre\u003e 'I played piano. John played football. Anita went home. Are you safe?'\u003c/pre\u003e\u003cp\u003eoutput all the matched sentences that begin and end with vowels:\u003c/p\u003e\u003cpre\u003e {'I played piano.','Anita went home.','Are you safe?'} \u003c/pre\u003e\u003cp\u003eOnly accept AEIOU/aeiou as vowels.\u003c/p\u003e","function_template":"function y = lazy(x)\r\n   y = {'I played piano.' 'Anita went home.' 'Are you safe?'};\r\nend","test_suite":"%%\r\nx = 'I played piano. John played football. Anita went home. Are you safe?';\r\ny = {'I played piano.' 'Anita went home.' 'Are you safe?'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'Are you okay? Who are you? Olga will call you. Sam saw me.';\r\ny = {'Olga will call you.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One is more. Than what? No it''s not. But why? Angela said so.';\r\ny = {'One is more.' 'Angela said so.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One plus two. Is four. No, that''t not right. It''s three.';\r\ny = {'One plus two.' 'It''s three.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'I went home. After the game. It was sad. It was lame. It was great!';\r\ny = {'I went home.' 'After the game.' 'It was lame.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One, two, three. Climb the tree. Four, five, six. It''s not here. Eight and nine. That''s fine.';\r\ny = {'One, two, three.' 'It''s not here.' 'Eight and nine.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'Either one is fine. Why? Because he said so.';\r\ny = {'Either one is fine.'};\r\nassert(isequal(lazy(x),y))\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":1,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":218,"test_suite_updated_at":"2016-12-12T18:11:23.000Z","rescore_all_solutions":false,"group_id":14,"created_at":"2012-03-31T01:45:24.000Z","updated_at":"2026-05-05T17:07:33.000Z","published_at":"2012-03-31T01:45:24.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"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\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a string, containing several sentences, such as:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ 'I played piano. John played football. Anita went home. Are you safe?']]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eoutput all the matched sentences that begin and end with vowels:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ {'I played piano.','Anita went home.','Are you safe?'}]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eOnly accept AEIOU/aeiou as vowels.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"problems":[{"id":541,"title":"Use of regexp","description":"Given a string, containing several sentences, such as:\r\n\r\n 'I played piano. John played football. Anita went home. Are you safe?'\r\n\r\noutput all the matched sentences that begin and end with vowels: \r\n\r\n {'I played piano.','Anita went home.','Are you safe?'} \r\n\r\nOnly accept AEIOU/aeiou as vowels.","description_html":"\u003cp\u003eGiven a string, containing several sentences, such as:\u003c/p\u003e\u003cpre\u003e 'I played piano. John played football. Anita went home. Are you safe?'\u003c/pre\u003e\u003cp\u003eoutput all the matched sentences that begin and end with vowels:\u003c/p\u003e\u003cpre\u003e {'I played piano.','Anita went home.','Are you safe?'} \u003c/pre\u003e\u003cp\u003eOnly accept AEIOU/aeiou as vowels.\u003c/p\u003e","function_template":"function y = lazy(x)\r\n   y = {'I played piano.' 'Anita went home.' 'Are you safe?'};\r\nend","test_suite":"%%\r\nx = 'I played piano. John played football. Anita went home. Are you safe?';\r\ny = {'I played piano.' 'Anita went home.' 'Are you safe?'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'Are you okay? Who are you? Olga will call you. Sam saw me.';\r\ny = {'Olga will call you.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One is more. Than what? No it''s not. But why? Angela said so.';\r\ny = {'One is more.' 'Angela said so.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One plus two. Is four. No, that''t not right. It''s three.';\r\ny = {'One plus two.' 'It''s three.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'I went home. After the game. It was sad. It was lame. It was great!';\r\ny = {'I went home.' 'After the game.' 'It was lame.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'One, two, three. Climb the tree. Four, five, six. It''s not here. Eight and nine. That''s fine.';\r\ny = {'One, two, three.' 'It''s not here.' 'Eight and nine.'};\r\nassert(isequal(lazy(x),y))\r\n\r\n%%\r\nx = 'Either one is fine. Why? Because he said so.';\r\ny = {'Either one is fine.'};\r\nassert(isequal(lazy(x),y))\r\n","published":true,"deleted":false,"likes_count":3,"comments_count":1,"created_by":166,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":218,"test_suite_updated_at":"2016-12-12T18:11:23.000Z","rescore_all_solutions":false,"group_id":14,"created_at":"2012-03-31T01:45:24.000Z","updated_at":"2026-05-05T17:07:33.000Z","published_at":"2012-03-31T01:45:24.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"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\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\\n\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eGiven a string, containing several sentences, such as:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ 'I played piano. John played football. Anita went home. Are you safe?']]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eoutput all the matched sentences that begin and end with vowels:\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"code\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003e\u003c![CDATA[ {'I played piano.','Anita went home.','Are you safe?'}]]\u003e\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eOnly accept AEIOU/aeiou as vowels.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"errors":[],"facets":[[{"value":"Strings I","count":1,"selected":false}],[{"value":"medium","count":1,"selected":false}]],"term":"tag:\"lazy quantifier\"","page":1,"per_page":50,"sort":"map(difficulty_value,0,0,999) asc"}}