/**
 * JavaScript functions that mimic PHP array functions.
 */
 

/**
 * Returns true if array 'haystack' contains element with value 'needle'
 * If strict is true then type must also match.
 *
 * @param var needle
 * @param var[] haystack
 * @param bool strict
 * @return bool
 */  
function in_array(needle, haystack, strict)
{
	var found = false;
	for (var key in haystack)
	{
		if (haystack[key] == needle && (!strict || strict && typeof(haystack[key]) == typeof(needle)))
		{
			return true;
		}
	}
	return false;
}


/**
 * Returns a string made up of all the elements of array 'pieces' connected,
 * with the string 'glue' in between them.
 *
 * @param string glue
 * @param string[] pieces
 * @return string
 */ 
function implode(glue, pieces)
{
	if (pieces.length == 0)
	{
		return "";
	}
	var result = pieces[0];
	for (var i = 1; i < pieces.length; i++)
	{
		result += glue + pieces[i];
	}
	return result;
}


/**
 * Splits a string on the given separator.
 *
 * @param string separator
 * @param string str
 * @return string[]
 */ 
function explode(seperator, str)
{
	return str.split(seperator);
}


/**
 * A variation of implode() in which empty strings are ignored.
 * (This is not a PHP function) 
 *
 * @param string glue
 * @param string[] pieces
 * @return string
 */ 
function implode_compact(glue, pieces)
{
	if (pieces.length == 0)
	{
		return;
	}
	var result = pieces[0];
	for (var i = 1; i < pieces.length; i++)
	{
		if (pieces[i] != '')
		{
			result += glue + pieces[i];
		}
	}
	return result;
}


/**
 * A function to display the contents of an array in readable form.
 *
 * @param array arr
 */ 
function debug_r(arr)
{
	var str = '';
	for (el in arr)
	{
		str += el + " => (" + typeof(arr[el]) + ") " + arr[el] + "\n";
	}
	alert(str);
}