Golang模板的“减号”功能

火狐游览器•2022-11-16•随笔•阅读10

Golang模板的“减号”功能

您总是可以定义这样的功能：

package mainimport (    "html/template"    "net/http"    "strconv")var funcMap = template.FuncMap{    "minus": minus,}const tmpl = `<html><body>    <div>        <span>{{minus 1 2}}</span>    </div></body></html>`var tmplGet = template.Must(template.New("").Funcs(funcMap).Parse(tmpl))func minus(a, b int64) string {    return strconv.FormatInt(a-b, 10)}func getPageHandler(w http.ResponseWriter, r *http.Request) {    if err := tmplGet.Execute(w, nil); err != nil {        http.Error(w, err.Error(), http.StatusInternalServerError)    }}func main() {    http.HandleFunc("/", getPageHandler)    http.ListenAndServe(":8080", nil)}

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