REBOL 3 Functions: probe

Description

The probe function will mold a value into reloadable source format and display it.

num: 1
probe [num + 2 "ABC"]
[num + 2 "ABC"]

Compare with the print function which will reduce the block:

print [num + 2 "ABC"]
3 ABC

Return Value

The probe function also returns its argument value as its result, making it easy to insert into code for debugging purposes.

Examples:

n: probe 1 + 2
3

print n
3

print 2 * probe pi * probe sine 45
0.707106781186547
2.22144146907918
4.44288293815837

word: 'here
if probe find [where here there] word [print "found"]
[here there]
found

See the print function for information about related functions.