Search ('all' for everything):
Search results:
N^N — compute exponential
expr & expr — evaluate in conjunction
expr \ i — limit generator
expr1 | expr2 — evaluate alternatives
L|||L — concatenate lists
N%N — compute remainder
N+N — compute sum
N/N — compute quotient
N1∗N2 — compute product
N<=N — numerically less than or equal
N<N — numerically less than
N=N — numerically equal
N>=N — numerically greater than or equal
N>N — numerically greater than
N~=N — numerically not equal
N–N — compute difference
R.f — get field of record
s ? expr — scan string
s<<=s — lexically less than or equal
s<<s — lexically less than
s==s — lexically equal
s>>=s — lexically greater than or equal
s>>s — lexically greater than
s||s — concatenate strings
s~==s — lexically not equal
v op:=x — augmented assignment
v:=:v — exchange values
v:=x — assign value
v<–>v — exchange values reversibly
v<–x — assign value reversibly
x++x — compute cset or set union
x===x — value equal
x@C — transmit value to co-expression
x~===x — value not equal
x––x — compute cset or set difference
x∗∗x — cset or set intersection

Index of Function Types:
affects &pos
character sets
co-expressions
control structures
file processing
generators
infix operations
keywords
lists, sets and tables
math
metadata
output formatting
pattern matching
prefix operations
records
strings
windows and keyboards

Index of Subsystems:
base
digitcnt.icn
SNOBOL4 functions
map
 
map characters
 
Description

s4 map(s1, s2, s3)
map(s1, s2, s3) produces a string of size s1 obtained by mapping characters of s1 that occur in s2 into corresponding characters in s3.
 
Parameters
s1
string to be mapped.
s2
string of (unique) characters in s1 to be looked up in s3.
s3
string of characters corresponding to s2 that are the replacement values. *s3 should equal *s2.
returns
s1 with characters in s2 mapped to s3.
 
Defaults
s2
string(&ucase)
s3
string(&lcase)
 
Errors
103 s1, s2 or s3 not a string
208 s2 ~= s3
 
See Also
  • any — locate initial character
  • many — move scanning position