{"id":12521,"date":"2022-10-01T00:45:38","date_gmt":"2022-09-30T19:15:38","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/"},"modified":"2022-10-01T00:45:38","modified_gmt":"2022-09-30T19:15:38","slug":"solved-how-to-transform-a-rust-number-into-english-words-like-1-one","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/","title":{"rendered":"[Solved] How to transform a Rust number into English words, like 1 -> “one”?"},"content":{"rendered":"

[ad_1]
\n<\/p>\n

\n
\n
<\/div>\n
\n
\n

I happen to have this program on hand since it’s a common problem on “coding challenge” websites. You have to decompose the number into groups of 3 digits each and then call the function for serializing the number into text recursively. Here’s the full solution:<\/p>\n

use std::iter::successors;\n\nconst ONES: [&str; 20] = [\n    \"zero\",\n    \"one\",\n    \"two\",\n    \"three\",\n    \"four\",\n    \"five\",\n    \"six\",\n    \"seven\",\n    \"eight\",\n    \"nine\",\n    \"ten\",\n    \"eleven\",\n    \"twelve\",\n    \"thirteen\",\n    \"fourteen\",\n    \"fifteen\",\n    \"sixteen\",\n    \"seventeen\",\n    \"eighteen\",\n    \"nineteen\",\n];\nconst TENS: [&str; 10] = [\n    \"zero\", \"ten\", \"twenty\", \"thirty\", \"forty\", \"fifty\", \"sixty\",\n    \"seventy\", \"eighty\", \"ninety\",\n];\nconst ORDERS: [&str; 7] = [\n    \"zero\",\n    \"thousand\",\n    \"million\",\n    \"billion\",\n    \"trillion\",\n    \"quadrillion\",\n    \"quintillion\", \/\/ enough for u64::MAX\n];\n\npub fn encode(num: u64) -> String {\n    match num {\n        0..=19 => ONES[num as usize].to_string(),\n        20..=99 => {\n            let upper = (num \/ 10) as usize;\n            match num % 10 {\n                0 => TENS[upper].to_string(),\n                lower => format!(\"{}-{}\", TENS[upper], encode(lower)),\n            }\n        }\n        100..=999 => format_num(num, 100, \"hundred\"),\n        _ => {\n            let (div, order) =\n                successors(Some(1u64), |v| v.checked_mul(1000))\n                    .zip(ORDERS.iter())\n                    .find(|&(e, _)| e > num \/ 1000)\n                    .unwrap();\n\n            format_num(num, div, order)\n        }\n    }\n}\n\nfn format_num(num: u64, div: u64, order: &str) -> String {\n    match (num \/ div, num % div) {\n        (upper, 0) => format!(\"{} {}\", encode(upper), order),\n        (upper, lower) => {\n            format!(\"{} {} {}\", encode(upper), order, encode(lower))\n        }\n    }\n}\n<\/code><\/pre>\n
rust playground link<\/a><\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            0<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved How to transform a Rust number into English words, like 1 -> “one”? <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] I happen to have this program on hand since it’s a common problem on “coding challenge” websites. You have to decompose the number into groups of 3 digits each and then call the function for serializing the number into text recursively. Here’s the full solution: use std::iter::successors; const ONES: [&str; 20] = [ “zero”, … 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":[942],"class_list":["post-12521","post","type-post","status-publish","format-standard","hentry","category-solved","tag-rust"],"yoast_head":"\n[Solved] How to transform a Rust number into English words, like 1 -> "one"? - 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-how-to-transform-a-rust-number-into-english-words-like-1-one\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to transform a Rust number into English words, like 1 -> "one"? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I happen to have this program on hand since it’s a common problem on “coding challenge” websites. You have to decompose the number into groups of 3 digits each and then call the function for serializing the number into text recursively. Here’s the full solution: use std::iter::successors; const ONES: [&str; 20] = [ "zero", ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-30T19:15:38+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-how-to-transform-a-rust-number-into-english-words-like-1-one\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] How to transform a Rust number into English words, like 1 -> “one”?\",\"datePublished\":\"2022-09-30T19:15:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\"},\"wordCount\":77,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"rust\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\",\"name\":\"[Solved] How to transform a Rust number into English words, like 1 -> \\\"one\\\"? - JassWeb\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#website\"},\"datePublished\":\"2022-09-30T19:15:38+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/jassweb.com\/solved\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Solved] How to transform a Rust number into English words, like 1 -> “one”?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/jassweb.com\/solved\/#website\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"name\":\"JassWeb\",\"description\":\"Build High-quality Websites\",\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/jassweb.com\/solved\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\",\"name\":\"Jass Web\",\"url\":\"https:\/\/jassweb.com\/solved\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"contentUrl\":\"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png\",\"width\":693,\"height\":132,\"caption\":\"Jass Web\"},\"image\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\",\"name\":\"Kirat\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"contentUrl\":\"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750\",\"caption\":\"Kirat\"},\"sameAs\":[\"http:\/\/jassweb.com\"],\"url\":\"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Solved] How to transform a Rust number into English words, like 1 -> \"one\"? - JassWeb","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/","og_locale":"en_US","og_type":"article","og_title":"[Solved] How to transform a Rust number into English words, like 1 -> \"one\"? - JassWeb","og_description":"[ad_1] I happen to have this program on hand since it’s a common problem on “coding challenge” websites. You have to decompose the number into groups of 3 digits each and then call the function for serializing the number into text recursively. Here’s the full solution: use std::iter::successors; const ONES: [&str; 20] = [ \"zero\", ... Read more","og_url":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/","og_site_name":"JassWeb","article_published_time":"2022-09-30T19:15:38+00:00","author":"Kirat","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Kirat","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/#article","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/"},"author":{"name":"Kirat","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31"},"headline":"[Solved] How to transform a Rust number into English words, like 1 -> “one”?","datePublished":"2022-09-30T19:15:38+00:00","mainEntityOfPage":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/"},"wordCount":77,"publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"keywords":["rust"],"articleSection":["Solved"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/","url":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/","name":"[Solved] How to transform a Rust number into English words, like 1 -> \"one\"? - JassWeb","isPartOf":{"@id":"https:\/\/jassweb.com\/solved\/#website"},"datePublished":"2022-09-30T19:15:38+00:00","breadcrumb":{"@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/jassweb.com\/solved\/solved-how-to-transform-a-rust-number-into-english-words-like-1-one\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/jassweb.com\/solved\/"},{"@type":"ListItem","position":2,"name":"[Solved] How to transform a Rust number into English words, like 1 -> “one”?"}]},{"@type":"WebSite","@id":"https:\/\/jassweb.com\/solved\/#website","url":"https:\/\/jassweb.com\/solved\/","name":"JassWeb","description":"Build High-quality Websites","publisher":{"@id":"https:\/\/jassweb.com\/solved\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/jassweb.com\/solved\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/jassweb.com\/solved\/#organization","name":"Jass Web","url":"https:\/\/jassweb.com\/solved\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/","url":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","contentUrl":"https:\/\/jassweb.com\/wp-content\/uploads\/2021\/02\/jass-website-logo-1.png","width":693,"height":132,"caption":"Jass Web"},"image":{"@id":"https:\/\/jassweb.com\/solved\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31","name":"Kirat","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/jassweb.com\/solved\/#\/schema\/person\/image\/","url":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750","contentUrl":"https:\/\/jassweb.com\/solved\/wp-content\/litespeed\/avatar\/1261af3c9451399fa1336d28b98ea3bb.jpg?ver=1775798750","caption":"Kirat"},"sameAs":["http:\/\/jassweb.com"],"url":"https:\/\/jassweb.com\/solved\/author\/jaspritsinghghumangmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/12521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/comments?post=12521"}],"version-history":[{"count":0,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/posts\/12521\/revisions"}],"wp:attachment":[{"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/media?parent=12521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/categories?post=12521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jassweb.com\/solved\/wp-json\/wp\/v2\/tags?post=12521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}