{"id":30918,"date":"2023-01-18T06:34:30","date_gmt":"2023-01-18T01:04:30","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-i-dont-understand-the-code-result-quote123funcx-int-string-return-fmt-sprintfb-x\/"},"modified":"2023-01-18T06:34:30","modified_gmt":"2023-01-18T01:04:30","slug":"solved-i-dont-understand-the-code-result-quote123funcx-int-string-return-fmt-sprintfb-x","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-i-dont-understand-the-code-result-quote123funcx-int-string-return-fmt-sprintfb-x\/","title":{"rendered":"[Solved] i don’t understand the code : result = quote123(func(x int) string { return fmt.Sprintf(“%b”, x) })"},"content":{"rendered":"

[ad_1]
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quote123<\/code> accepts any function that takes an integer argument and returns a string. The argument passed to it in this code is a function literal, also known as an enclosure or an anonymous function, with this signature. The function literal has two parts:<\/p>\n

func(x int) string<\/code><\/p>\n

This is the signature of the functional literal. This shows you that it matches the argument type taken by quote123<\/code>, which is the type convert<\/code>, a named type defined as type convert func(int) string<\/code><\/p>\n

{ return fmt.Sprintf(\"%b\", x) }<\/code><\/p>\n

This is the body, or implementation, of the function literal. This is the code actually run when the function literal is called. In this case, it takes the integer x<\/code>, formats it in binary (that’s what the %b<\/code> formatting verb does) as a string, and returns that string.<\/p>\n

quote123<\/code> takes this function as an argument, calls it with an integer (in this case, the integer 123<\/code>), then takes the string return by it and formats it using the %q<\/code> formatting verb, which surrounds the given strings in quotations.<\/p>\n

The net effect of this is 123 is passed in, formatted as binary (1111011<\/code>), returned as a string (1111011<\/code>), then formatted again with surrounding quotes (\"1111011\"<\/code>) which is then ultimately printed out to console.<\/p>\n

Accepting a function literal like this allows you to customize behavior when calling a function. quote123<\/code> will always return a quoted string, but what’s in that can change. For example, if I instead gave it the following literal:<\/p>\n

func(x int) string { return fmt.Sprintf(\"%06d\", x) }<\/code><\/p>\n

I would get back the string \"000123\"<\/code>, because the formatting verb %06d<\/code> says to print it as an integer, with width 6, and pad it with 0’s instead of space characters. If I instead used:<\/p>\n

func(x int) string { return \"hello world\" }<\/code><\/p>\n

I would always get back the string \"hello world\"<\/code>, regardless of which integer it was called with.<\/p>\n<\/p><\/div>\n

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

3<\/span> <\/p><\/div>\n<\/div>\n

[ad_2]<\/p>\n

solved i don’t understand the code : result = quote123(func(x int) string { return fmt.Sprintf(“%b”, x) }) <\/p>\n","protected":false},"excerpt":{"rendered":"

[ad_1] quote123 accepts any function that takes an integer argument and returns a string. The argument passed to it in this code is a function literal, also known as an enclosure or an anonymous function, with this signature. The function literal has two parts: func(x int) string This is the signature of the functional literal. … 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":[596],"class_list":["post-30918","post","type-post","status-publish","format-standard","hentry","category-solved","tag-go"],"yoast_head":"\n[Solved] i don't understand the code : result = quote123(func(x int) string { return fmt.Sprintf("%b", x) }) - 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-i-dont-understand-the-code-result-quote123funcx-int-string-return-fmt-sprintfb-x\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] i don't understand the code : result = quote123(func(x int) string { return fmt.Sprintf("%b", x) }) - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] quote123 accepts any function that takes an integer argument and returns a string. 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