英文:
List of printing format in Go lang
问题
%v 用于打印值。
%T 可以打印值的类型。
还有什么?
英文:
Just want to know the list of printing format using the fmt package's functions.
For example, like:
%v is use for print the value.
%T can print the type of value.
What else?
答案1
得分: 36
The list of format "verbs" is available in the documentation of the fmt package :
General:
%v 默认格式的值。
当打印结构体时,加号标志(%+v)会添加字段名
%#v 值的Go语法表示
%T 值的类型的Go语法表示
%% 字面百分号;不消耗任何值
布尔值:
%t true或false
整数:
%b 二进制
%c 由对应的Unicode代码点表示的字符
%d 十进制
%o 八进制
%q 使用Go语法安全转义的单引号字符字面量
%x 十六进制,小写字母a-f
%X 十六进制,大写字母A-F
%U Unicode格式:U+1234;与"U+%04X"相同
浮点数和复数成分:
%b 无小数点的科学计数法,指数为2的幂,
类似于strconv.FormatFloat的'b'格式,例如-123456p-78
%e 科学计数法,例如-1234.456e+78
%E 科学计数法,例如-1234.456E+78
%f 有小数点但没有指数,例如123.456
%g 根据%e或%f产生更紧凑的输出
%G 根据%E或%f产生更紧凑的输出
字符串和字节切片:
%s 字符串或切片的未解释字节
%q 使用Go语法安全转义的双引号字符串
%x 十六进制,小写,每个字节两个字符
%X 十六进制,大写,每个字节两个字符
指针:
%p 十六进制表示,带有前导0x
其他标志:
+ 始终为数值打印符号;
对于%q(%+q),保证输出为ASCII字符
- 在右侧填充空格而不是左侧(左对齐字段)
# 备用格式:在八进制(%#o)前添加前导0,十六进制(%#x)前添加0x;
十六进制(%#X)前添加0X;对于%p(%#p),抑制0x;
如果可能,对于%q(%#q),打印原始(反引号)字符串;
对于%U(%#U),如果字符可打印,则写入例如U+0078 'x'。
' ' (空格)在数字中为省略符号留出空格(% d);
在以十六进制打印字符串或切片时,在字节之间放置空格(% x,% X)
0 用前导零而不是空格填充
英文:
The list of format "verbs" is available in the documentation of the fmt package :
General:
%v the value in a default format.
when printing structs, the plus flag (%+v) adds field names
%#v a Go-syntax representation of the value
%T a Go-syntax representation of the type of the value
%% a literal percent sign; consumes no value
Boolean:
%t the word true or false
Integer:
%b base 2
%c the character represented by the corresponding Unicode code point
%d base 10
%o base 8
%q a single-quoted character literal safely escaped with Go syntax.
%x base 16, with lower-case letters for a-f
%X base 16, with upper-case letters for A-F
%U Unicode format: U+1234; same as "U+%04X"
Floating-point and complex constituents:
%b decimalless scientific notation with exponent a power of two,
in the manner of strconv.FormatFloat with the 'b' format,
e.g. -123456p-78
%e scientific notation, e.g. -1234.456e+78
%E scientific notation, e.g. -1234.456E+78
%f decimal point but no exponent, e.g. 123.456
%g whichever of %e or %f produces more compact output
%G whichever of %E or %f produces more compact output
String and slice of bytes:
%s the uninterpreted bytes of the string or slice
%q a double-quoted string safely escaped with Go syntax
%x base 16, lower-case, two characters per byte
%X base 16, upper-case, two characters per byte
Pointer:
%p base 16 notation, with leading 0x
Other flags:
+ always print a sign for numeric values;
guarantee ASCII-only output for %q (%+q)
- pad with spaces on the right rather than the left (left-justify the field)
# alternate format: add leading 0 for octal (%#o), 0x for hex (%#x);
0X for hex (%#X); suppress 0x for %p (%#p);
print a raw (backquoted) string if possible for %q (%#q);
write e.g. U+0078 'x' if the character is printable for %U (%#U).
' ' (space) leave a space for elided sign in numbers (% d);
put spaces between bytes printing strings or slices in hex (% x, % X)
0 pad with leading zeros rather than spaces
答案2
得分: 4
你可以了解更多信息,请查看http://golang.org/pkg/fmt/
并运行
$ godoc -http=0.0.0.0:8080
在浏览器中打开localhost:8080以获取完整的离线go网站(包括您的go源代码和文档)
英文:
You can find out more, check this out http://golang.org/pkg/fmt/
and run
$ godoc -http=0.0.0.0:8080
browser open localhost:8080 to get entire offline go website (also including your go src & doc)
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