🎉 mul command

src/command/mul.js

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+Juicescript.command_define({
+	name: "mul",
+	alias: [],
+	
+	validate: function(runner){
+		// count
+		runner.argument_validate_count({min: 2, max: null});
+		if(runner.has_error) return;
+		
+		// types
+		runner.argument_validate_type(1, Juicescript.argument_type.VARIABLE);
+		
+		for(var q = 2; q <= runner.command.argument.length; q++){
+			runner.argument_validate_type(q, Juicescript.argument_type.VALUE);
+		}
+	},
+	
+	execute: function(runner){
+		// GET VARIABLE //
+		// variable object
+		let variable = runner.argument_variable(1);
+		
+		// get its value and data_type
+		let value = runner.variable_get(variable);
+		let data_type = runner.data_type(value);
+		
+		
+		// MULTIPLY ALL OTHER FACTORS //
+		let main_factor = 1;
+		for(var q = 2; q <= runner.command.argument.length; q++){
+			// get factor
+			let factor = runner.argument_value(q);
+			
+			// validate data type
+			let factor_data_type = runner.data_type(factor);
+			if(factor_data_type !== Juicescript.data_type.NUM){
+				// ignore with warning
+				runner.warning_argument(q, "invalid data type " + Juicescript.data_type.name(factor_data_type));
+				continue;
+			}
+			
+			// factor into main factor
+			main_factor *= factor;
+		}
+		
+		
+		// NUMBER MULTIPLICATION //
+		if(data_type === Juicescript.data_type.NUM){
+			// multiply by main factor
+			value *= main_factor
+			
+			// store back to variable
+			runner.variable_set(variable, value);
+			return;
+		}
+		
+		
+		// STRING MULTIPLICATION //
+		if(data_type === Juicescript.data_type.STR){
+			// repeat string factor-times
+			value = value.repeat(main_factor);
+			
+			// store back to variable
+			runner.variable_set(variable, value);
+			return;
+		}
+		
+		
+		// INVALID DATA TYPE //
+		// ignore with warning
+		runner.warning_argument(1, "invalid data type " + Juicescript.data_type.name(data_type));
+	}
+});