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strconv
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atob.go
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atob_test.go
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atoc.go
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atoc_test.go
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atof.go
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atof_test.go
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atoi.go
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atoi_test.go
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bytealg.go
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bytealg_bootstrap.go
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ctoa.go
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ctoa_test.go
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decimal.go
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decimal_test.go
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doc.go
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eisel_lemire.go
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example_test.go
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export_test.go
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fp_test.go
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ftoa.go
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ftoa_test.go
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ftoaryu.go
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ftoaryu_test.go
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internal_test.go
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isprint.go
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itoa.go
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itoa_test.go
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makeisprint.go
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quote.go
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quote_test.go
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strconv_test.go
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testdata
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Editing: example_test.go
Close
// Copyright 2015 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package strconv_test import ( "fmt" "log" "strconv" ) func ExampleAppendBool() { b := []byte("bool:") b = strconv.AppendBool(b, true) fmt.Println(string(b)) // Output: // bool:true } func ExampleAppendFloat() { b32 := []byte("float32:") b32 = strconv.AppendFloat(b32, 3.1415926535, 'E', -1, 32) fmt.Println(string(b32)) b64 := []byte("float64:") b64 = strconv.AppendFloat(b64, 3.1415926535, 'E', -1, 64) fmt.Println(string(b64)) // Output: // float32:3.1415927E+00 // float64:3.1415926535E+00 } func ExampleAppendInt() { b10 := []byte("int (base 10):") b10 = strconv.AppendInt(b10, -42, 10) fmt.Println(string(b10)) b16 := []byte("int (base 16):") b16 = strconv.AppendInt(b16, -42, 16) fmt.Println(string(b16)) // Output: // int (base 10):-42 // int (base 16):-2a } func ExampleAppendQuote() { b := []byte("quote:") b = strconv.AppendQuote(b, `"Fran & Freddie's Diner"`) fmt.Println(string(b)) // Output: // quote:"\"Fran & Freddie's Diner\"" } func ExampleAppendQuoteRune() { b := []byte("rune:") b = strconv.AppendQuoteRune(b, '☺') fmt.Println(string(b)) // Output: // rune:'☺' } func ExampleAppendQuoteRuneToASCII() { b := []byte("rune (ascii):") b = strconv.AppendQuoteRuneToASCII(b, '☺') fmt.Println(string(b)) // Output: // rune (ascii):'\u263a' } func ExampleAppendQuoteToASCII() { b := []byte("quote (ascii):") b = strconv.AppendQuoteToASCII(b, `"Fran & Freddie's Diner"`) fmt.Println(string(b)) // Output: // quote (ascii):"\"Fran & Freddie's Diner\"" } func ExampleAppendUint() { b10 := []byte("uint (base 10):") b10 = strconv.AppendUint(b10, 42, 10) fmt.Println(string(b10)) b16 := []byte("uint (base 16):") b16 = strconv.AppendUint(b16, 42, 16) fmt.Println(string(b16)) // Output: // uint (base 10):42 // uint (base 16):2a } func ExampleAtoi() { v := "10" if s, err := strconv.Atoi(v); err == nil { fmt.Printf("%T, %v", s, s) } // Output: // int, 10 } func ExampleCanBackquote() { fmt.Println(strconv.CanBackquote("Fran & Freddie's Diner ☺")) fmt.Println(strconv.CanBackquote("`can't backquote this`")) // Output: // true // false } func ExampleFormatBool() { v := true s := strconv.FormatBool(v) fmt.Printf("%T, %v\n", s, s) // Output: // string, true } func ExampleFormatFloat() { v := 3.1415926535 s32 := strconv.FormatFloat(v, 'E', -1, 32) fmt.Printf("%T, %v\n", s32, s32) s64 := strconv.FormatFloat(v, 'E', -1, 64) fmt.Printf("%T, %v\n", s64, s64) // Output: // string, 3.1415927E+00 // string, 3.1415926535E+00 } func ExampleFormatInt() { v := int64(-42) s10 := strconv.FormatInt(v, 10) fmt.Printf("%T, %v\n", s10, s10) s16 := strconv.FormatInt(v, 16) fmt.Printf("%T, %v\n", s16, s16) // Output: // string, -42 // string, -2a } func ExampleFormatUint() { v := uint64(42) s10 := strconv.FormatUint(v, 10) fmt.Printf("%T, %v\n", s10, s10) s16 := strconv.FormatUint(v, 16) fmt.Printf("%T, %v\n", s16, s16) // Output: // string, 42 // string, 2a } func ExampleIsGraphic() { shamrock := strconv.IsGraphic('☘') fmt.Println(shamrock) a := strconv.IsGraphic('a') fmt.Println(a) bel := strconv.IsGraphic('\007') fmt.Println(bel) // Output: // true // true // false } func ExampleIsPrint() { c := strconv.IsPrint('\u263a') fmt.Println(c) bel := strconv.IsPrint('\007') fmt.Println(bel) // Output: // true // false } func ExampleItoa() { i := 10 s := strconv.Itoa(i) fmt.Printf("%T, %v\n", s, s) // Output: // string, 10 } func ExampleParseBool() { v := "true" if s, err := strconv.ParseBool(v); err == nil { fmt.Printf("%T, %v\n", s, s) } // Output: // bool, true } func ExampleParseFloat() { v := "3.1415926535" if s, err := strconv.ParseFloat(v, 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat(v, 64); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("NaN", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } // ParseFloat is case insensitive if s, err := strconv.ParseFloat("nan", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("inf", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("+Inf", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("-Inf", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("-0", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseFloat("+0", 32); err == nil { fmt.Printf("%T, %v\n", s, s) } // Output: // float64, 3.1415927410125732 // float64, 3.1415926535 // float64, NaN // float64, NaN // float64, +Inf // float64, +Inf // float64, -Inf // float64, -0 // float64, 0 } func ExampleParseInt() { v32 := "-354634382" if s, err := strconv.ParseInt(v32, 10, 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseInt(v32, 16, 32); err == nil { fmt.Printf("%T, %v\n", s, s) } v64 := "-3546343826724305832" if s, err := strconv.ParseInt(v64, 10, 64); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseInt(v64, 16, 64); err == nil { fmt.Printf("%T, %v\n", s, s) } // Output: // int64, -354634382 // int64, -3546343826724305832 } func ExampleParseUint() { v := "42" if s, err := strconv.ParseUint(v, 10, 32); err == nil { fmt.Printf("%T, %v\n", s, s) } if s, err := strconv.ParseUint(v, 10, 64); err == nil { fmt.Printf("%T, %v\n", s, s) } // Output: // uint64, 42 // uint64, 42 } func ExampleQuote() { // This string literal contains a tab character. s := strconv.Quote(`"Fran & Freddie's Diner ☺"`) fmt.Println(s) // Output: // "\"Fran & Freddie's Diner\t☺\"" } func ExampleQuoteRune() { s := strconv.QuoteRune('☺') fmt.Println(s) // Output: // '☺' } func ExampleQuoteRuneToASCII() { s := strconv.QuoteRuneToASCII('☺') fmt.Println(s) // Output: // '\u263a' } func ExampleQuoteRuneToGraphic() { s := strconv.QuoteRuneToGraphic('☺') fmt.Println(s) s = strconv.QuoteRuneToGraphic('\u263a') fmt.Println(s) s = strconv.QuoteRuneToGraphic('\u000a') fmt.Println(s) s = strconv.QuoteRuneToGraphic(' ') // tab character fmt.Println(s) // Output: // '☺' // '☺' // '\n' // '\t' } func ExampleQuoteToASCII() { // This string literal contains a tab character. s := strconv.QuoteToASCII(`"Fran & Freddie's Diner ☺"`) fmt.Println(s) // Output: // "\"Fran & Freddie's Diner\t\u263a\"" } func ExampleQuoteToGraphic() { s := strconv.QuoteToGraphic("☺") fmt.Println(s) // This string literal contains a tab character. s = strconv.QuoteToGraphic("This is a \u263a \u000a") fmt.Println(s) s = strconv.QuoteToGraphic(`" This is a ☺ \n "`) fmt.Println(s) // Output: // "☺" // "This is a ☺\t\n" // "\" This is a ☺ \\n \"" } func ExampleUnquote() { s, err := strconv.Unquote("You can't unquote a string without quotes") fmt.Printf("%q, %v\n", s, err) s, err = strconv.Unquote("\"The string must be either double-quoted\"") fmt.Printf("%q, %v\n", s, err) s, err = strconv.Unquote("`or backquoted.`") fmt.Printf("%q, %v\n", s, err) s, err = strconv.Unquote("'\u263a'") // single character only allowed in single quotes fmt.Printf("%q, %v\n", s, err) s, err = strconv.Unquote("'\u2639\u2639'") fmt.Printf("%q, %v\n", s, err) // Output: // "", invalid syntax // "The string must be either double-quoted", <nil> // "or backquoted.", <nil> // "☺", <nil> // "", invalid syntax } func ExampleUnquoteChar() { v, mb, t, err := strconv.UnquoteChar(`\"Fran & Freddie's Diner\"`, '"') if err != nil { log.Fatal(err) } fmt.Println("value:", string(v)) fmt.Println("multibyte:", mb) fmt.Println("tail:", t) // Output: // value: " // multibyte: false // tail: Fran & Freddie's Diner\" } func ExampleNumError() { str := "Not a number" if _, err := strconv.ParseFloat(str, 64); err != nil { e := err.(*strconv.NumError) fmt.Println("Func:", e.Func) fmt.Println("Num:", e.Num) fmt.Println("Err:", e.Err) fmt.Println(err) } // Output: // Func: ParseFloat // Num: Not a number // Err: invalid syntax // strconv.ParseFloat: parsing "Not a number": invalid syntax }