Description
Starts searching STRING2 from the Nth letter in STRING. It returns the position of the Mth occurrence of SEARCH_STRING in STRING.
If the length of SEARCH_STRING is longer than 1, it returns the location of the first letter.
If N is negative, it start searching from the end of STRING. The value of M must be pisitive.
The default of both N and M is 1. This starts searching SEARCH_STRING from the beginning of STRING. It returns the position of the first occurrence of SEARCH_STRING in STRING.
The return value is the exact position from the beginning of the letters, regardless of the value of N.
If the search fails (e.x. there are not M occurrences of SEARCH_STRING in STRING after Nth letter), the return value is 0.
Syntax
ret = instr(string1,search_string,n,m)
Parameters
| string1 | : | Character string to be searched |
| search_string | : | Search string |
| n | : | Location to start searching
Default: 1 |
| m | : | Number of strings to be searched
Default: 1 |
Return Value
| integral number | : | Location found | |
| 0 | : | Search fails | |
System Return Value
Example
//[result example]
// 1:6
// 2:13
//
run()
exit
function run()
local a = 'data1;.data2;.data3;.data4'
print(instr(a, ';.', 1, 1))
print(instr(a, ';.', -8, 1))
endfunction
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