Beau­tiful Racket / racket school 2019

• 1 intro
• 2 algebra
• 3 precalc
• 4 boss battle
• 5 alpha
• 6 bravo
• 7 charlie
• 8 delta
• 9 echo
• 10 foxtrot
• 11 golf
• 12 grand finale
• 13 thank you

1. 

   addi­tion & subtrac­tion

   var a = 42;
   a + 1 + a - 42; // 43

   1 2	var a = 42; a + 1 + a - 42; // 43

   
2. 

   multi­pli­ca­tion & divi­sion

   var a = 42;
   a * 1 / a * 42; // 42

   1 2	var a = 42; a * 1 / a * 42; // 42

   
3. 

   postfix incre­ment

   var a = 42;
   a++ + 42; // 84
   a; // 43

   1 2 3

   var a = 42; a++ + 42; // 84 a; // 43

   
4. 

   Of course, oper­ator prece­dence should be handled correctly.

   var a = 42;
   500 - a++ * 10; // 80
   a; // 43

   1 2 3

   var a = 42; 500 - a++ * 10; // 80 a; // 43

   

1. 

   Imple­ment the other incre­ment and decre­ment oper­a­tors.

   var x = 42;
   x++; // 42
   ++x; // 44
   --x; // 43
   x--; // 43
   x; // 42

   1 2 3 4 5 6

   var x = 42; x++; // 42 ++x; // 44 --x; // 43 x--; // 43 x; // 42

   
2. 

   Imple­ment the addi­tion and subtrac­tion assign­ment oper­a­tors += and -=.

   var x = 42;
   x += 10; // 52
   x -= 50; // 2

   1 2 3

   var x = 42; x += 10; // 52 x -= 50; // 2

   
3. 

   Imple­ment paren­the­sized subex­pres­sions.

   1 + 2 * 3; // 7
   (1 + 2) * 3; // 9

   1 2	1 + 2 * 3; // 7 (1 + 2) * 3; // 9

   

• 1 intro
• 2 algebra
• 3 precalc
• 4 boss battle
• 5 alpha
• 6 bravo
• 7 charlie
• 8 delta
• 9 echo
• 10 foxtrot
• 11 golf
• 12 grand finale
• 13 thank you