# Template Functions

Beego supports custom template functions, but it must be set as below before web.Run():

	func hello(in string)(out string){
		out = in + "world"
		return
	}
	
	web.AddFuncMap("hi",hello)

Then you can use these functions in template:

	{{.Content | hi}}

Here are Beego's built-in template functions:

dateformat: Format time, return string.

{{dateformat .Time "2006-01-02T15:04:05Z07:00"}}

date: This is similar to date function in PHP. It can easily return time by string.
```
{{date .T "Y-m-d H:i:s"}}
```
compare: Compare two objects. If they are the same return true, otherwise return false.
```
{{compare .A .B}}
```
substr: Return sub string, supports UTF-8 string.
```
{{substr .Str 0 30}}
```
html2str: Parse html to string by removing tags like script and css and return text.
```
{{html2str .Htmlinfo}}
```
str2html: Parse string to HTML, no escaping.
```
{{str2html .Strhtml}}
```
htmlquote: Escaping html.
```
{{htmlquote .quote}}
```
htmlunquote: Unescaping to html.
```
{{htmlunquote .unquote}}
```
renderform: Generate form from StructTag.
```
{{&struct | renderform}}
```
assets_js: Create a <script> tag from js src.
```
{{assets_js src}}
```
assets_css: Create a <link> tag from css src.
```
{{assets_css src}}
```
config: Get the value of AppConfig and the type must be String, Bool, Int, Int64, Float, or DIY.
```
{{config configType configKey defaultValue}}
```

map_get: Get value of map by key.

            // In controller
            Data["m"] = map[string]interface{} {
                "a": 1,
                "1": map[string]float64{
                    "c": 4,
                },
            }
  
            // In view
            {{ map_get m "a" }} // return 1
            {{ map_get m 1 "c" }} // return 4

urlfor: Get the URL of a controller method.
```
  {{urlfor "TestController.List"}}
```

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