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passing_20arrays_20to_20subs_20and_20functions
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passing_20arrays_20to_20subs_20and_20functions [2018/03/31 14:19] 127.0.0.1 external edit |
passing_20arrays_20to_20subs_20and_20functions [2018/04/17 19:08] tbest3112 Added syntax highlighting |
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| //by Richard Russell, March 2014//\\ \\ LB Booster provides the capability of passing an entire array as a parameter to a SUB or a FUNCTION. Here is a simple example:\\ | //by Richard Russell, March 2014//\\ \\ LB Booster provides the capability of passing an entire array as a parameter to a SUB or a FUNCTION. Here is a simple example:\\ | ||
| + | <code lb> | ||
| one(5) = 123 | one(5) = 123 | ||
| call test one() | call test one() | ||
| Line 9: | Line 10: | ||
| print two(5) | print two(5) | ||
| end sub | end sub | ||
| + | </code> | ||
| To demonstrate that the array **two()** is genuinely 'local' to the SUB:\\ | To demonstrate that the array **two()** is genuinely 'local' to the SUB:\\ | ||
| + | <code lb> | ||
| one(5) = 123 | one(5) = 123 | ||
| two(5) = 456 | two(5) = 456 | ||
| Line 19: | Line 22: | ||
| print two(5) | print two(5) | ||
| end sub | end sub | ||
| + | </code> | ||
| Arrays are automatically passed 'by reference' (you don't need to specify BYREF):\\ | Arrays are automatically passed 'by reference' (you don't need to specify BYREF):\\ | ||
| + | <code lb> | ||
| one(5) = 123 | one(5) = 123 | ||
| two(5) = 456 | two(5) = 456 | ||
| Line 31: | Line 36: | ||
| two(5) = 789 | two(5) = 789 | ||
| end sub | end sub | ||
| + | </code> | ||
| But you **must** use BYREF if you want to REDIM the array inside the SUB (requires LBB v2.53 or later):\\ | But you **must** use BYREF if you want to REDIM the array inside the SUB (requires LBB v2.53 or later):\\ | ||
| + | <code lb> | ||
| one(5) = 123 | one(5) = 123 | ||
| two(5) = 456 | two(5) = 456 | ||
| Line 44: | Line 51: | ||
| two(15) = 789 | two(15) = 789 | ||
| end sub | end sub | ||
| + | </code> | ||
| Of course you can use a FUNCTION instead of a SUB:\\ | Of course you can use a FUNCTION instead of a SUB:\\ | ||
| + | <code lb> | ||
| one(5) = 123 | one(5) = 123 | ||
| two(5) = 456 | two(5) = 456 | ||
| Line 56: | Line 65: | ||
| two(5) = 789 | two(5) = 789 | ||
| end function | end function | ||
| + | </code> | ||
passing_20arrays_20to_20subs_20and_20functions.txt ยท Last modified: 2018/04/17 19:08 by tbest3112
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