for forspec

-wrong parameter ("Arma") defined!-1.00

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Description

Description:

Creates cycle, using C like style. See example.

In Arma 3 use private keyword when defining any variables for the scope, see example 4.

Groups:

Uncategorised

Syntax

Syntax:

for forspec

Parameters:

forspec: Array

Return Value:

For Type

Examples

Example 1:

for [{_x= 1},{_x <= 10},{_x = _x + 1}] do {debugLog _x;}

Example 2:

_a = 0; for [{},{_a <= 10},{_a = _a + 1}] do {debugLog _a;};

Example 3:

for [{_a = 0; _b = 1},{_a <= 10},{_a = _a + 1; _b = _b + _b}] do {}; //_a = 11; _b = 2048;

Example 4:

// BAD CODE _i = 100; for [{_i = 0}, {_i < 5}, {_i = _i + 1}] do {}; hint str _i; // 5 // GOOD CODE (private keyword is recommended) _i = 100; for [{private _i = 0}, {_i < 5}, {_i = _i + 1}] do {}; hint str _i; // 100

Additional Information

See also:

Control Structuresfor dowhile

Notes

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Only post proven facts here! Add Note

Notes

Posted on Apr 15, 2014 - 12:54

ffur2007slx2_5

• 1.16 Please note the difference between for forspec and for do, for forspec detects Boolean in each scope while for do doesn’t. e.g.

command	Structure	Summary
for forspec	a = 0; b = true; for [{_i = 0},{_i < 10 && b},{_i = _i + 1}] do { a = a + 1; if (a >= 7) then {b = false} }	loop can be exited via Boolean control, possible workaround can be like BIS_fnc_areEqual
for do	a = 0; for "_i" from 0 to 10 do { a = a + 1; if (a >= 7) exitwith {} };	have to be exited via exitWith

• Never try to tell a decimal number via binary number in a loop; otherwise the loop will be infinite:

for [{_a = 0},{_a != 1},{_a = _a + 0.1}] do {}; //an infinite loop; _a will never be 1 so the scope will always be true. Any binary number behind the decimal point is always the sum of 1/2, 1/4, 1/8, 1/16 etc. so decimal number with odd denominator like 1/3 or 1/10 cannot be exactly equal to each other.

• Avoid too large factorial multiply which may loose the leading indicator in result. And 12 is the biggest accessable factor in this example.

for [{_a = 2; _b = 1;},{_a < 100},{_a = _a + 1}] do {_b = _b * _a}; // _b = 1.#INF