coffee-toaster/src/toaster/utils/array-util.coffee

Minimalist build system for CoffeeScript.

class ArrayUtil

  @find:(source, search, by_property)->
    if !by_property
      for v, k in source
        return {item: v, index: k} if v == search
    else
      by_property = [].concat by_property
      for v, k in source
        for p in by_property
          return {item: v, index: k} if search == v[p]
    
    return null



  @find_all:(source, search, by_property, regexp, unique)->
    _output = []
    _unique = {}

    if by_property is null

      for v, k in source
        if regexp
          item = {item: v, index: k} if search.test v
        else
          item = {item: v, index: k} if search == v
        
        _output.push item if item
    else
      
      by_property = [].concat by_property
      for v, k in source
        
        for p in by_property
          item = null

          if regexp
            if search.test v[p]
              if unique && !_unique[k]
                item = {item: v, index: k}
              else if unique is not true
                item = {item: v, index: k}
          else
            if search == v[p]
              item = {item: v, index: k}
          
          if item
            _unique[k] = true
            _output.push item

    return _output



  @diff:(a = [], b = [], by_property)->
    diff = []
    
    for item in a
      search = if by_property? then item[by_property] else item
      if !ArrayUtil.has b, search, by_property
        diff.push {item:item, action:"deleted"}
    
    for item in b
      search = if by_property? then item[by_property] else item
      if !ArrayUtil.has a, search, by_property
        diff.push {item:item, action:"created"}
    
    diff



  @has:(source, search, by_property)->
    return ArrayUtil.find( source, search, by_property )?



  @replace_into:( src, index, items )->
    items = [].concat items
    src.splice index, 1
    while items.length
      src.splice index++, 0, items.shift()
    src