Order operations spin (NOOB question)

Comments

• Heater. Posts: 21,230

  2016-04-15 07:05

  ~ is precedence level 0 and X~ is post-clear to 0.
  
  - is precedence level 6 and is subtract.
  
  The key point here is the "post", as in "after".
  
  So what you have in "cogStop(cog~ - 1)" is:
  
  1) Take the value of cog into some internal temporary value.
  
  2) Set the value of cog to zero.
  
  3) Subtract one from that internal temporary value.
  
  4) Pass the temporary value to cogStop as a parameter.
• Electrodude Posts: 1,621

  2016-04-15 08:05 edited 2016-04-15 08:05

  x~ is evaluated before - 1.
  
  x~ clears x but returns the old value of x. Just like how x++ increments x but returns the old value of x (while ++x increments x but returns the new value instead of the old).
• vwinter Posts: 2

  2016-04-15 17:36

  Thank you I understand now.