Hallo der.
Wenn ich das richtig sehe, kommst du um eval() nicht herum...
So müsst es gehen:
for(var x=1;x<50;x++)
{
eval("var current_map_array = "map_""+x+";");
var c_value = current_map_array[x]
alert(c_value);
}
Man liest sich, H2O
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