set 
Purpose
Set the value of a variable accessible with the GSP page.Examples
<g:set var="tomorrow" value="${new Date(today.getTime() + 24L * 60 * 60 * 1000)}" />
<g:sef var="counter" value="${1}" />
<g:each in="${list}">
    ${counter}.  ${it} -> ${counter % 2 == 0 ? 'even' : 'odd'}
    <g:set var="counter" value="${counter + 1}" /><br>
</g:each><g:set var="foo" value="${new Date()}" scope="page" />
<g:set var="bar" value="${new Date()-7}" scope="session" /><g:set var="foo">Hello!</g:set>
Description
Attributes
- var- The name of the variable
- value- The initial value to be assgined
- scope- Scope to set variable in (either "request", "page", "flash" or "session")
Source
Show Source
def set = { attrs, body ->
		def scope = attrs.scope ? SCOPES[attrs.scope] : 'pageScope'
		def var = attrs.var
		def value = attrs.value
		def containsValue = attrs.containsKey('value')
		if(!scope) throw new IllegalArgumentException("Invalid [scope] attribute for tag <g:set>!")
		if(!var) throw new IllegalArgumentException("[var] attribute must be specified to for <g:set>!")		if(!containsValue && body) value = body()		this."$scope"."$var" = value
	}