Difference between revisions of "Hello world and hello Texas from Database"
From VistApedia
| Line 5: | Line 5: | ||
MUMPS>write "hello " write $P(^DIC(5,48,0),"^",1) | MUMPS>write "hello " write $P(^DIC(5,48,0),"^",1) | ||
hello TEXAS | hello TEXAS | ||
| + | |||
| + | What the above hello TEXAS line does: | ||
| + | |||
| + | * Invoke the $piece command which is similar too but not exactly like the substring command in many other languages. | ||
| + | * The ^ indicates that this is not a local variable, that it is looking for data on disk that others can see. | ||
| + | * DIC indicates look in the data dictionary in file 5, field 48, item 0 with the ^ in this case being a delimiter and return only 1 token. | ||
Revision as of 15:57, 9 February 2010
Install with something like Astronaut. Get to a GT.M prompt. Item 3 if you are using VistA Commander.
MUMPS>write "hello world"
hello world
MUMPS>write "hello " write $P(^DIC(5,48,0),"^",1)
hello TEXAS
What the above hello TEXAS line does:
- Invoke the $piece command which is similar too but not exactly like the substring command in many other languages.
- The ^ indicates that this is not a local variable, that it is looking for data on disk that others can see.
- DIC indicates look in the data dictionary in file 5, field 48, item 0 with the ^ in this case being a delimiter and return only 1 token.
