英文:
Go text/template: how to convert bool to int 0/1?
问题
使用Go的text/template语言，您可以如何将bool转换为int（false=0，true=1）？
以下是使用我自己的goproc工具（https://github.com/dolmen-go/goproc）执行命令行模板的示例：
$ echo false | goproc -e '{{.}} => <template here>'
false => 0
$ echo true | goproc -e '{{.}} => <template here>'
true => 1
英文:
With Go text/template language, how can I convert a bool to an int (false=0, true=1)?
Here is an example using my own goproc tool that allows to execute template from the command line:
$ echo false | goproc -e '{{.}} => <template here>'
false => 0
$ echo true | goproc -e '{{.}} => <template here>'
true => 1
答案1
得分: 1
这里有一个技巧：使用index内置函数从一个特制的字符串中提取字节值，该字符串在位置5和4分别包含字节0和1。字符串"true"/"false"的长度被用作索引值。
$ echo false | goproc -e '{{.}} => {{index "....$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
1$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
0" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
1$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
0" (len (print .))}}{{"\n"}}'
true => 1
英文:
Here is a hack: use the index built-in function to extract byte values from a specially crafted string that contains bytes 0 and 1 respectively at positions 5 and 4. The lengths of strings "true"/"false" are used as the index value.
$ echo false | goproc -e '{{.}} => {{index "....$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
1$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
0" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
1$ echo false | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
false => 0
$ echo true | goproc -e '{{.}} => {{index "....\001\000" (len (print .))}}{{"\n"}}'
true => 1
0" (len (print .))}}{{"\n"}}'
true => 1
答案2
得分: 1
这可能是最简单的方式：
digitizeBoolTemplate := "{{if . }}1{{else}}0{{end}}"
https://goplay.tools/snippet/T6EwkKLNmhG
英文:
This is probably the simplest:
digitizeBoolTemplate := "{{if . }}1{{else}}0{{end}}"
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