ss
, ssr
¶
String search – and replace
ss
¶
String search
x ss y ss[x;y]
Where
x
is a stringy
is a pattern as a string (no asterisk)
returns an int vector of position/s within x
of substrings that match pattern y
.
q)"We the people of the United States" ss "the"
3 17
q)s:"toronto ontario"
q)s ss "ont"
3 8
q)s ss "[ir]o"
2 13
q)s ss "t?r"
0 10
ssr
¶
String search and replace
ssr[x;y;z]
Where
x
is a stringy
is a pattern as a string (no asterisk)z
is a string or a function
returns x
with each substring matching y
replaced by:
z
ifz
is a stringz[Y]
wherez
is a function andY
is the matched substring
q)s:"toronto ontario"
q)ssr[s;"ont";"x"] / replace "ont" by "x"
"torxo xario"
q)ssr[s;"t?r";upper] / replace matches by their uppercase
"TORonto onTARio"
like
Regular Expressions in q
Strings
Using regular expressions