ESP8266 Community Forum

- Sun Dec 27, 2015 6:57 pm #37277 Function right() returns the string from the end position, not the start.

Example...
msg = "This is a test"
print right(msg,6)

returns "a test"

- Sun Dec 27, 2015 9:06 pm #37281 Try this test:

Code: Select allmsg = "this_is_a_long_string_to_test"
short = left(msg,6)
print short
short = right(msg,6)
print short
short = mid(msg,6,3)
print short
short = mid(msg,6)
print short
print "All done!"
wait

left(msg,x) gives you the leftmost x characters
right(msg,x) gives you the righmost x characters
mid(msg,x,y) gives you the y most characters starting at position x.
mid(msg, x) gives you zero characters because y is zero. Other basics would give you the remainder of the string if y is omitted.

Code: Select allthis_i
o_test
is_

All done!

All lines are printed to the console but only the first two lines appear in the web interface!

Jim

- Sun Dec 27, 2015 10:44 pm #37284

right(msg,x) gives you the righmost x characters

If that is the way it should work then the documentation is wrong.

- Sun Dec 27, 2015 11:04 pm #37285

If that is the way it should work then the documentation is wrong.

I agree that the documentation needs improving.

If you want the right part of a string starting at position x and returning the remainder of the string, you can use

Code: Select allshort = mid(msg,6,99)
print short

where 99 is any number that is longer than the longest string.

Jim