- let lowercaseMarks = marks.filter(function (x) /[a-z]/.test(x)).sort();
- let uppercaseMarks = marks.filter(function (x) /[A-Z]/.test(x)).sort();
- let numberMarks = marks.filter(function (x) /[0-9]/.test(x)).sort();
+ let lowercaseMarks = marks.filter(bind("test", /[a-z]/)).sort();
+ let uppercaseMarks = marks.filter(bind("test", /[A-Z]/)).sort();
+ let numberMarks = marks.filter(bind("test", /[0-9]/)).sort();