RTrm$: Difference between revisions
No edit summary |
|||
| Line 9: | Line 9: | ||
====Comments and Examples==== | ====Comments and Examples==== | ||
RTRM$ can be used to delete extra spaces when formatting an address to CITY, STATE. Line 530 will always allow 18 columns for CITY$ and print the comma in column 19, regardless of the number of non-blank characters in the string. Since RTRM$ is used in line 540, the comma will print immediately after the last non-blank character in CITY$. | RTRM$ can be used to delete extra spaces when formatting an address to CITY, STATE. Line 530 will always allow 18 columns for CITY$ and print the comma in column 19, regardless of the number of non-blank characters in the string. Since RTRM$ is used in line 540, the comma will print immediately after the last non-blank character in CITY$. | ||
| Line 22: | Line 23: | ||
====Related Functions==== | ====Related Functions==== | ||
See [[LTRM$]] to trim blanks from the left and [[LPAD$]] and [[RPAD$]] to add blanks. | See [[LTRM$]] to trim blanks from the left and [[LPAD$]] and [[RPAD$]] to add blanks. | ||
====Technical Considerations==== | ====Technical Considerations==== | ||
# To remove blanks from strings read from a formatted file or screen, V format is an alternative to RTRM$. Reading X$ with V format is equivalent to reading X$ with C format, then doing X$=RTRM$(X$). For example, lines 520 and 540 in the Comments and Examples section above could be changed as follows and still achieve the same results: | # To remove blanks from strings read from a formatted file or screen, V format is an alternative to RTRM$. Reading X$ with V format is equivalent to reading X$ with C format, then doing X$=RTRM$(X$). For example, lines 520 and 540 in the Comments and Examples section above could be changed as follows and still achieve the same results: | ||
00520 FORM V 18, C 2 | 00520 FORM V 18, C 2 | ||
00540 PRINT CITY$;", ";STATE$ | 00540 PRINT CITY$;", ";STATE$ | ||
Revision as of 10:52, 30 January 2012
RTrm$(AS[,"char"])
The RTrm$ internal function returns A$, deleting all trailing blanks. So named, because it Right TRiMs the blanks from the string in A$.
An optional second parameter ("char") has been added to LTRM$ and RTRM$ to specify the character to strip (instead of blanks, which are still the default). The "char" parameter is limited to one character in length (error 0410 will result if it is longer). Nulls and CHR$(0) are allowed. The following statement would return the value 12:
PRINT RTRM$("1200","0")
Comments and Examples
RTRM$ can be used to delete extra spaces when formatting an address to CITY, STATE. Line 530 will always allow 18 columns for CITY$ and print the comma in column 19, regardless of the number of non-blank characters in the string. Since RTRM$ is used in line 540, the comma will print immediately after the last non-blank character in CITY$.
00510 READ #2,USING 520: CITY$, STATE$ 00520 FORM C 18, C 2 00530 PRINT CITY$;", ";STATE$ 00540 PRINT RTRM$(CITY$);", ";STATE$
When the file contains Minneapolis and MN, the output will be:
Minneapolis , MN
Minneapolis, MN
Related Functions
See LTRM$ to trim blanks from the left and LPAD$ and RPAD$ to add blanks.
Technical Considerations
- To remove blanks from strings read from a formatted file or screen, V format is an alternative to RTRM$. Reading X$ with V format is equivalent to reading X$ with C format, then doing X$=RTRM$(X$). For example, lines 520 and 540 in the Comments and Examples section above could be changed as follows and still achieve the same results:
00520 FORM V 18, C 2 00540 PRINT CITY$;", ";STATE$