pug mixins for underscore template engine

pug underscore helpers

//- pug mixins for underscore template engine
//- Examples:
+if('js_expression')
  div ...
+else
  div ...
+endIf

+each('js_arr','obj,key')
  |{{key}} : {{obj.prop}}
+endEach

mixin if(condition)
  -var str = `{!!{if (${condition}) { }}`
  |!{str}
  if block
    block


mixin else
  -var str = "{!!{ } else { }}"
  |!{str}
  if block
    block


mixin elseIf(condition)
  -var str = `{!!{ } else if (${condition}) { }}`
  |!{str}
  if block
    block


mixin endIf
  -var str = "{!!{ } }}"
  |!{str}


mixin each(obj,args)
  -var str = `{!!{ _.each(${obj},function(${args}){ }}`
  |!{str}
  if block
    block


mixin endEach
  -var str = "{!!{ }); }}"
  |!{str}


mixin repeat(n)
  -var str = `{!!{var n = ${n}; for (var i = 1; i <= n; i++) { }}`
  |!{str}
  if block
    block

mixin endRepeat
  -var str = "{!!{ } }}"
  |!{str}


-var _if = (condition,value) => { return `{!!{ if(${condition}) { }}  ${value} {!!{ } }}` }