frameworks/projects/Core/src/main/royale/org/apache/royale/utils/string/trimLeft.as

////////////////////////////////////////////////////////////////////////////////
//
//  Licensed to the Apache Software Foundation (ASF) under one or more
//  contributor license agreements.  See the NOTICE file distributed with
//  this work for additional information regarding copyright ownership.
//  The ASF licenses this file to You under the Apache License, Version 2.0
//  (the "Licens"); you may not use this file except in compliance with
//  the License.  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
package org.apache.royale.utils.string
{
    import org.apache.royale.debugging.assert;
	/**
	 *  Checks that an index falls within the allowable range of an array.
	 *  Returns true if it's valid, false if not.
	 *  @langversion 3.0
	 *  @playerversion Flash 10.2
	 *  @playerversion AIR 2.6
	 *  @productversion Royale 0.9
	 */
    public function trimLeft(str:String):String
    {
        assert(str != null,"trim() cannot be called on null");

        COMPILE::SWF{
            var startIndex:int = 0;
            while (isWhitespace(str.charAt(startIndex)))
                ++startIndex;
            
            return str.slice(startIndex);
        }

        COMPILE::JS{
            return str.trimLeft();
        }
    }   
}