Here’s how to use the sbs() function.
Get an integer consisting of certain bytes of a serial byte key.
Syntax:
|
k.sbs(a:b,…) |
Get the integer made up of bytes from the ath to the bth in serial byte key k |
Note:
The function gets a certain byte a or certain bytes from a to b to form an integer.
Parameter:
|
k |
A serial byte key |
|
a |
The ath byte of serial byte k; begin from the first byte when this parameter is absent |
|
b |
The bth byte of serial byte k; stop at the last byte when this parameter is absent, and get the ath byte only when :b is absent |
Return value:
Integer
Example:
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k(4,5,6,8).sbs(2) |
5; get the second byte from serial byte key k(4,5,6,8) to generate an integer. |
|
k(4,5,6,8).sbs(1:3) |
263430; get the bytes from 1 to 3 from serial byte key k(4,5,6,8) to generate an integer. |
|
k(4,5,6,8).sbs(2:) |
329224; get bytes from the second to the end from serial byte key k(4,5,6,8) to generate an integer. |
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k(4,5,6,8).sbs(:4) |
67438088; get byte from the second to the fourth from serial byte key k(4,5,6,8) to generate an integer. |
Description:
Get multiple substrings from a string to form a new string.
Syntax:
s.sbs(a:b,…)
Note:
The function gets multiple substrings from string s to form a new string.
Parameter:
|
s |
The source string from which substrings are to be obtained |
|
a |
The start position where substrings are obtained; it is the a-to-last when a<0; default is 1 |
|
b |
The end position where substrings end; it is the b-to-last when a<0; let be=s.len() when b>s.len() or b is absent; let b=a when :b is absent |
Return value:
String
Example:
|
|
A |
|
|
1 |
="abcdefgh".sbs(2:3) |
"bc" |
|
2 |
="abcdefgh".sbs(:3) |
"abc" |
|
3 |
="abcdefgh".sbs(3:) |
"cdefgh" |
|
4 |
="abcdefgh".sbs(3) |
"c" |
|
5 |
="abcdefgh".sbs(2:4,6:7) |
"bcdfg" |
|
6 |
="abcdefgh".sbs(-5:7) |
"defg" |
|
7 |
="abcdefgh".sbs(2:-3) |
"bcdef" |
|
8 |
="abcdefgh".sbs(3:10) |
"cdefgh" |