{"id":20241,"date":"2022-11-09T03:34:40","date_gmt":"2022-11-08T22:04:40","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/"},"modified":"2022-11-09T03:34:40","modified_gmt":"2022-11-08T22:04:40","slug":"solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/","title":{"rendered":"[Solved] Find starting and ending indices of list chunks satisfying given condition"},"content":{"rendered":"

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<\/div>\n
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How about using some flags to track where you are in the checking process and some variables to hold historical info?<\/p>\n

This is not super elegant code but it is fairly simple to understand I think and fairly robust for the use case you gave.<\/p>\n

My code<\/strong><\/p>\n

cross = [7,5,8,0,0,0,0,2,5,8,0,0,0,0,8,7,9,3,0,0,0,3,2,1,4,5,0,0,0,7,5] \nfoundstart = False\nfoundend = False\nstartindex = 0\nendindex = 0\nfor i in range(0, len(cross)):\n    if cross[i] != 0:\n        if not foundstart:\n            foundstart = True\n            startindex = i\n    else:\n        if foundstart:\n            foundend = True\n            endindex = i - 1\n\n    if foundend:\n        print(startindex, endindex)\n        foundstart = False\n        foundend = False\n        startindex = 0\n        endindex = 0\n\nif foundstart:\n    print(startindex, len(cross)-1)\n<\/code><\/pre>\n
Output<\/strong><\/p>\n
0 2\n7 9\n14 17\n21 25\n29 30\n<\/code><\/pre>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            2<\/span> <\/p><\/div>\n<\/div>\n
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solved Find starting and ending indices of list chunks satisfying given condition <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] How about using some flags to track where you are in the checking process and some variables to hold historical info? This is not super elegant code but it is fairly simple to understand I think and fairly robust for the use case you gave. My code cross = [7,5,8,0,0,0,0,2,5,8,0,0,0,0,8,7,9,3,0,0,0,3,2,1,4,5,0,0,0,7,5] foundstart = False foundend … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[4748,540,349],"class_list":["post-20241","post","type-post","status-publish","format-standard","hentry","category-solved","tag-indices","tag-list","tag-python"],"yoast_head":"\n[Solved] Find starting and ending indices of list chunks satisfying given condition - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Find starting and ending indices of list chunks satisfying given condition - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] How about using some flags to track where you are in the checking process and some variables to hold historical info? This is not super elegant code but it is fairly simple to understand I think and fairly robust for the use case you gave. My code cross = [7,5,8,0,0,0,0,2,5,8,0,0,0,0,8,7,9,3,0,0,0,3,2,1,4,5,0,0,0,7,5] foundstart = False foundend ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-08T22:04:40+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Find starting and ending indices of list chunks satisfying given condition\",\"datePublished\":\"2022-11-08T22:04:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\"},\"wordCount\":74,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"indices\",\"list\",\"python\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-find-starting-and-ending-indices-of-list-chunks-satisfying-given-condition\/\",\"name\":\"[Solved] Find starting and ending indices of list chunks satisfying given condition - 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This is not super elegant code but it is fairly simple to understand I think and fairly robust for the use case you gave. My code cross = [7,5,8,0,0,0,0,2,5,8,0,0,0,0,8,7,9,3,0,0,0,3,2,1,4,5,0,0,0,7,5] foundstart = False foundend ... 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