[Trigger] I dont understand this trigger action!

[machris13]

what is the purpose of
"For each(Integer A) from 1 to 10, do (Actions)"

i dont understand that^ !!

 

[lolreported]

That action will run everything inside it 10 times, this is called a loop.

• For each(Integer A) from 1 to 10, do (Actions)

You can modify this loop by changing number 1 and 10. At this case number 1 is the start number for the loop and number 10 is the end number. So this loop will loop through itself 10 times.

If you change it to:

• For each(Integer A) from 1 to 100, do (Actions)

it will loop 100 times.

And this loop:

• For each(Integer A) from 6 to 20, do (Actions)

will loop 15 times

Example:

This trigger below here will print out the text "Hello World!" five times at the screen, but with a loop you can do it A LOT simpler!

• Loop Test
  • Events
  • Conditions
  • Actions
    • Game - Display to (All players) the text: Hello World!
    • Game - Display to (All players) the text: Hello World!
    • Game - Display to (All players) the text: Hello World!
    • Game - Display to (All players) the text: Hello World!
    • Game - Display to (All players) the text: Hello World!

The same trigger above but with a loop:

• Loop Test
  • Events
  • Conditions
  • Actions
    • For each (Integer A) from 1 to 5, do (Actions)
      • Loop - Actions
        • Game - Display to (All players) the text: Hello World!

Do you get it? You can play around a lot with loops, this is just basics.

 

[Dr Super Good]

Its a very poor way of conroling itteration that GUI provides you with.

In reality (jass) it loops until any contained exitwhen statmenets receive true, which can not be comparision related.

 

[tjordell]

Well Dr Super Good, there aren't many triggerers that needs a loop that does things 9999999999999999999999999999999999999999999999999999999999999999 times instead of 9999999.

 

[Bu113t]

And I guess the average GUI guy also dont understand most of what you said.

 

[Dr Super Good]

tjordell, what you said was rather pointless. Firstly WC3 can not handle that left number cause it is greater than an signed integer of size 32 bits. Secondly a loop with fewer itterations than that you mentioned would easilly hit the op limit and thus cause a "thread crash" which basically means code will stop executing once the limit is reached.

exitwhen true
Can be used as a hard coded break out of a loop. This is not that often used cause you can just place the conditional code after the loop but in some cases could be useful.

exitwhen u = null
Is used for an unefficent enum. Basically where you loop through a group of units by getting the first unit and removing that from the group repetitivly. Works with forces as well but generally its better to enum through the group/force (faster).

You can even have more complex conditions and still be valid but in the end it is entrily up to what you need.

 

[Berb]

Loops are basic control structures. Key word, basic.