{"id":1419,"date":"2016-10-31T12:31:50","date_gmt":"2016-10-31T12:31:50","guid":{"rendered":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/?p=1419"},"modified":"2016-11-03T15:12:56","modified_gmt":"2016-11-03T15:12:56","slug":"ah-binary-search","status":"publish","type":"post","link":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/2016\/10\/31\/ah-binary-search\/","title":{"rendered":"AH &#8211; Binary Search"},"content":{"rendered":"<p><a href=\"https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1.png\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1425\" data-permalink=\"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/2016\/10\/31\/ah-binary-search\/binsear-2\/\" data-orig-file=\"https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1.png\" data-orig-size=\"1004,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"binsear\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/glow-prod-nl.s3.eu-west-1.amazonaws.com\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1-300x215.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEKr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCWV1LXdlc3QtMSJHMEUCIQCvYHCtSA8ObkiNc8RB5bOc8MUw7D0vXsVDN8Q%2Fp8np7gIgW41dVGMI%2Ff3r5bv1Whvonmimu07pz%2FMrt6WLj8XYYGYquAUIcxAFGgwyNzM1NzAxOTU0MzMiDGMpu85Wlvb1JVaICiqVBegYcHYNcD0SKJ97lK0eNd5Bg4oujU4P6bsZ5RMn7f%2FDjNMXVtHah4xI7QZzQIVzqMcEZOK3RrOots1TLUyjWLjyIr2vWeiFUp9rOapynpiqfluQgWpNhFRVlc5883kHMnZ8gMhFR%2FXgrzggsCK%2FywNWjAqlx0ja1pqFEp8oN0oEb8y63EK8K6bkX%2FQsyZuVcWxEq2R344oKqkpFtn53jjBgPuHYj4PlgrjtlY%2BKK6wLnnoGNCO7Foe1%2FG2E98mUA4%2B1lm3MvDdl9YVkfhcYwVUe%2BrDp9P9r1Z0ekNam5H1fWv3fuwFM0XT7ppiZ7DBXcn13anGmAOxQ7cmUV5umBNSKO4WLtaw8yANkBuEEoG3q81lKK5OINS949qV5x99rI62AhJDX2ftFPVXWjDNPQUqTQqqLFh1ZC7PdbPyHHsZvKiKBlIwAnHxKKJ0K6Y1RPY21cxlKn6g%2F6zwttDR75DNb%2BS6%2BQp6wdRUiOeBIK63iTxxU7sd1rbCqrrHiyWwHPuejjLIV4N2R%2B9sROJ5TT964fMWDHW6MsF9thNtF%2BoluO6QVthIPqY5hmnDusSHf%2FPef5NXfEy274OPdkkxiBohBnQqmFtVXqkG6eesYzl2wJctm9IlPDQJgnR8LzP9Hd54YlQQGtDRm03BHS8ZI8DscLVaNwLajAa4yNXda8MUngwi3StujbI9WQfXhE7crq3Yfn%2B3p9NI74lDUc84qMV8dGkgDv%2B8R%2BEJmsFk7eaDDad%2BpmwrhAqFLTegTzMHJMkZ0SRK%2BvDtYKs4QbXNdoxIB%2Bbo7VCmjHo10nNtzr%2FTVd9z7n9BPK0Nq6oNRLG33VlJLIdaZbY%2FN1bNBvhA2dCU47heH%2FdclZzDhWPxHU3zhipP8tNsw756rzwY6sQFBTmDY8l93ONbzer1P5l%2FNI9%2F%2Fd4%2FcqhOEBGJGHDjMeCxxbKjWvOEV4Aebd66Lslp5qqqFhWXFfI8tvKSKht%2FW8r9mGZ0dAl4XFSQWnoNts1CSHWWJRdFpxeCiAw3NDpuntD50785frZqGyGwphKKrxWie4ucK3thNiQOi9wO3H5nG3mgPZejO7olkmBfkxCGZSQg3ULgek7X3kbpoQFDwnqpW8mscjX3IwI2FFxUE%2Bkk%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U7MULW535%2F20260424%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260424T025853Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=c13141424d1a027991cf15d6dbfa3c39eb75b202c29848913d728b3732b56f10\" data-large-file=\"https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1.png\" class=\"alignleft size-medium wp-image-1425\" src=\"https:\/\/glow-prod-nl.s3.eu-west-1.amazonaws.com\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1-300x215.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&#038;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEKr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCWV1LXdlc3QtMSJHMEUCIQCvYHCtSA8ObkiNc8RB5bOc8MUw7D0vXsVDN8Q%2Fp8np7gIgW41dVGMI%2Ff3r5bv1Whvonmimu07pz%2FMrt6WLj8XYYGYquAUIcxAFGgwyNzM1NzAxOTU0MzMiDGMpu85Wlvb1JVaICiqVBegYcHYNcD0SKJ97lK0eNd5Bg4oujU4P6bsZ5RMn7f%2FDjNMXVtHah4xI7QZzQIVzqMcEZOK3RrOots1TLUyjWLjyIr2vWeiFUp9rOapynpiqfluQgWpNhFRVlc5883kHMnZ8gMhFR%2FXgrzggsCK%2FywNWjAqlx0ja1pqFEp8oN0oEb8y63EK8K6bkX%2FQsyZuVcWxEq2R344oKqkpFtn53jjBgPuHYj4PlgrjtlY%2BKK6wLnnoGNCO7Foe1%2FG2E98mUA4%2B1lm3MvDdl9YVkfhcYwVUe%2BrDp9P9r1Z0ekNam5H1fWv3fuwFM0XT7ppiZ7DBXcn13anGmAOxQ7cmUV5umBNSKO4WLtaw8yANkBuEEoG3q81lKK5OINS949qV5x99rI62AhJDX2ftFPVXWjDNPQUqTQqqLFh1ZC7PdbPyHHsZvKiKBlIwAnHxKKJ0K6Y1RPY21cxlKn6g%2F6zwttDR75DNb%2BS6%2BQp6wdRUiOeBIK63iTxxU7sd1rbCqrrHiyWwHPuejjLIV4N2R%2B9sROJ5TT964fMWDHW6MsF9thNtF%2BoluO6QVthIPqY5hmnDusSHf%2FPef5NXfEy274OPdkkxiBohBnQqmFtVXqkG6eesYzl2wJctm9IlPDQJgnR8LzP9Hd54YlQQGtDRm03BHS8ZI8DscLVaNwLajAa4yNXda8MUngwi3StujbI9WQfXhE7crq3Yfn%2B3p9NI74lDUc84qMV8dGkgDv%2B8R%2BEJmsFk7eaDDad%2BpmwrhAqFLTegTzMHJMkZ0SRK%2BvDtYKs4QbXNdoxIB%2Bbo7VCmjHo10nNtzr%2FTVd9z7n9BPK0Nq6oNRLG33VlJLIdaZbY%2FN1bNBvhA2dCU47heH%2FdclZzDhWPxHU3zhipP8tNsw756rzwY6sQFBTmDY8l93ONbzer1P5l%2FNI9%2F%2Fd4%2FcqhOEBGJGHDjMeCxxbKjWvOEV4Aebd66Lslp5qqqFhWXFfI8tvKSKht%2FW8r9mGZ0dAl4XFSQWnoNts1CSHWWJRdFpxeCiAw3NDpuntD50785frZqGyGwphKKrxWie4ucK3thNiQOi9wO3H5nG3mgPZejO7olkmBfkxCGZSQg3ULgek7X3kbpoQFDwnqpW8mscjX3IwI2FFxUE%2Bkk%3D&#038;X-Amz-Algorithm=AWS4-HMAC-SHA256&#038;X-Amz-Credential=ASIAT7MQN47U7MULW535%2F20260424%2Feu-west-1%2Fs3%2Faws4_request&#038;X-Amz-Date=20260424T025853Z&#038;X-Amz-SignedHeaders=host&#038;X-Amz-Expires=900&#038;X-Amz-Signature=c13141424d1a027991cf15d6dbfa3c39eb75b202c29848913d728b3732b56f10\" alt=\"binsear\" width=\"300\" height=\"215\" srcset=\"https:\/\/glow-prod-nl.s3.eu-west-1.amazonaws.com\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1-300x215.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEKr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCWV1LXdlc3QtMSJHMEUCIQCvYHCtSA8ObkiNc8RB5bOc8MUw7D0vXsVDN8Q%2Fp8np7gIgW41dVGMI%2Ff3r5bv1Whvonmimu07pz%2FMrt6WLj8XYYGYquAUIcxAFGgwyNzM1NzAxOTU0MzMiDGMpu85Wlvb1JVaICiqVBegYcHYNcD0SKJ97lK0eNd5Bg4oujU4P6bsZ5RMn7f%2FDjNMXVtHah4xI7QZzQIVzqMcEZOK3RrOots1TLUyjWLjyIr2vWeiFUp9rOapynpiqfluQgWpNhFRVlc5883kHMnZ8gMhFR%2FXgrzggsCK%2FywNWjAqlx0ja1pqFEp8oN0oEb8y63EK8K6bkX%2FQsyZuVcWxEq2R344oKqkpFtn53jjBgPuHYj4PlgrjtlY%2BKK6wLnnoGNCO7Foe1%2FG2E98mUA4%2B1lm3MvDdl9YVkfhcYwVUe%2BrDp9P9r1Z0ekNam5H1fWv3fuwFM0XT7ppiZ7DBXcn13anGmAOxQ7cmUV5umBNSKO4WLtaw8yANkBuEEoG3q81lKK5OINS949qV5x99rI62AhJDX2ftFPVXWjDNPQUqTQqqLFh1ZC7PdbPyHHsZvKiKBlIwAnHxKKJ0K6Y1RPY21cxlKn6g%2F6zwttDR75DNb%2BS6%2BQp6wdRUiOeBIK63iTxxU7sd1rbCqrrHiyWwHPuejjLIV4N2R%2B9sROJ5TT964fMWDHW6MsF9thNtF%2BoluO6QVthIPqY5hmnDusSHf%2FPef5NXfEy274OPdkkxiBohBnQqmFtVXqkG6eesYzl2wJctm9IlPDQJgnR8LzP9Hd54YlQQGtDRm03BHS8ZI8DscLVaNwLajAa4yNXda8MUngwi3StujbI9WQfXhE7crq3Yfn%2B3p9NI74lDUc84qMV8dGkgDv%2B8R%2BEJmsFk7eaDDad%2BpmwrhAqFLTegTzMHJMkZ0SRK%2BvDtYKs4QbXNdoxIB%2Bbo7VCmjHo10nNtzr%2FTVd9z7n9BPK0Nq6oNRLG33VlJLIdaZbY%2FN1bNBvhA2dCU47heH%2FdclZzDhWPxHU3zhipP8tNsw756rzwY6sQFBTmDY8l93ONbzer1P5l%2FNI9%2F%2Fd4%2FcqhOEBGJGHDjMeCxxbKjWvOEV4Aebd66Lslp5qqqFhWXFfI8tvKSKht%2FW8r9mGZ0dAl4XFSQWnoNts1CSHWWJRdFpxeCiAw3NDpuntD50785frZqGyGwphKKrxWie4ucK3thNiQOi9wO3H5nG3mgPZejO7olkmBfkxCGZSQg3ULgek7X3kbpoQFDwnqpW8mscjX3IwI2FFxUE%2Bkk%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U7MULW535%2F20260424%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260424T025853Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=c13141424d1a027991cf15d6dbfa3c39eb75b202c29848913d728b3732b56f10 300w, https:\/\/glow-prod-nl.s3.eu-west-1.amazonaws.com\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1-150x108.png?X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&amp;X-Amz-Security-Token=IQoJb3JpZ2luX2VjEKr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCWV1LXdlc3QtMSJHMEUCIQCvYHCtSA8ObkiNc8RB5bOc8MUw7D0vXsVDN8Q%2Fp8np7gIgW41dVGMI%2Ff3r5bv1Whvonmimu07pz%2FMrt6WLj8XYYGYquAUIcxAFGgwyNzM1NzAxOTU0MzMiDGMpu85Wlvb1JVaICiqVBegYcHYNcD0SKJ97lK0eNd5Bg4oujU4P6bsZ5RMn7f%2FDjNMXVtHah4xI7QZzQIVzqMcEZOK3RrOots1TLUyjWLjyIr2vWeiFUp9rOapynpiqfluQgWpNhFRVlc5883kHMnZ8gMhFR%2FXgrzggsCK%2FywNWjAqlx0ja1pqFEp8oN0oEb8y63EK8K6bkX%2FQsyZuVcWxEq2R344oKqkpFtn53jjBgPuHYj4PlgrjtlY%2BKK6wLnnoGNCO7Foe1%2FG2E98mUA4%2B1lm3MvDdl9YVkfhcYwVUe%2BrDp9P9r1Z0ekNam5H1fWv3fuwFM0XT7ppiZ7DBXcn13anGmAOxQ7cmUV5umBNSKO4WLtaw8yANkBuEEoG3q81lKK5OINS949qV5x99rI62AhJDX2ftFPVXWjDNPQUqTQqqLFh1ZC7PdbPyHHsZvKiKBlIwAnHxKKJ0K6Y1RPY21cxlKn6g%2F6zwttDR75DNb%2BS6%2BQp6wdRUiOeBIK63iTxxU7sd1rbCqrrHiyWwHPuejjLIV4N2R%2B9sROJ5TT964fMWDHW6MsF9thNtF%2BoluO6QVthIPqY5hmnDusSHf%2FPef5NXfEy274OPdkkxiBohBnQqmFtVXqkG6eesYzl2wJctm9IlPDQJgnR8LzP9Hd54YlQQGtDRm03BHS8ZI8DscLVaNwLajAa4yNXda8MUngwi3StujbI9WQfXhE7crq3Yfn%2B3p9NI74lDUc84qMV8dGkgDv%2B8R%2BEJmsFk7eaDDad%2BpmwrhAqFLTegTzMHJMkZ0SRK%2BvDtYKs4QbXNdoxIB%2Bbo7VCmjHo10nNtzr%2FTVd9z7n9BPK0Nq6oNRLG33VlJLIdaZbY%2FN1bNBvhA2dCU47heH%2FdclZzDhWPxHU3zhipP8tNsw756rzwY6sQFBTmDY8l93ONbzer1P5l%2FNI9%2F%2Fd4%2FcqhOEBGJGHDjMeCxxbKjWvOEV4Aebd66Lslp5qqqFhWXFfI8tvKSKht%2FW8r9mGZ0dAl4XFSQWnoNts1CSHWWJRdFpxeCiAw3NDpuntD50785frZqGyGwphKKrxWie4ucK3thNiQOi9wO3H5nG3mgPZejO7olkmBfkxCGZSQg3ULgek7X3kbpoQFDwnqpW8mscjX3IwI2FFxUE%2Bkk%3D&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=ASIAT7MQN47U7MULW535%2F20260424%2Feu-west-1%2Fs3%2Faws4_request&amp;X-Amz-Date=20260424T025853Z&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Expires=900&amp;X-Amz-Signature=7638c65faa57e9d472def5d729b051a1b436580eefdd94b22cda184a6302c2c2 150w, https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/10\/BinSear-1.png 1004w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/courses.scholar.hw.ac.uk\/vle\/scholar\/session.controller?action=viewContent&amp;contentGUID=2ebe7036-a190-d775-dd84-cad8c3e4401b\">Binary search <\/a>is a more efficient way of searching a sorted list.<\/p>\n<p>The Python function given gives you an example of how this might be implemented. It either returns the found position or -1 meaning that the value has not been found.<\/p>\n<p>There are <a href=\"http:\/\/python3.codes\/binary-search\/\">other implementations available<\/a> that make use of different constructs including <a href=\"http:\/\/www.python-course.eu\/recursive_functions.php\">recursion<\/a>.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Binary search is a more efficient way of searching a sorted list. The Python function given gives you an example of how this might be implemented. It either returns the found position or -1 meaning that the value has not been found. There are other implementations available that make use of different constructs including recursion. &hellip;<\/p>\n","protected":false},"author":32,"featured_media":1387,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[432046,432045],"class_list":["post-1419","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-advanced-higher","tag-binary-search","tag-recursion"],"jetpack_featured_media_url":"https:\/\/blogs.glowscotland.org.uk\/nl\/public\/ColtnessHS-ComputingScience\/uploads\/sites\/12638\/2016\/09\/Slide5.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/users\/32"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/comments?post=1419"}],"version-history":[{"count":5,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1419\/revisions"}],"predecessor-version":[{"id":1427,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/posts\/1419\/revisions\/1427"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/media\/1387"}],"wp:attachment":[{"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/media?parent=1419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/categories?post=1419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.glowscotland.org.uk\/nl\/ColtnessHS-ComputingScience\/wp-json\/wp\/v2\/tags?post=1419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}