method
Text.contains
Text.contains(s, sub) -> bool
Returns true when sub occurs anywhere inside s. An empty substring is always considered present. Use it for a quick membership test — filtering a log line, checking for a forbidden word, or seeing whether a path includes a folder — when you do not need the position. Reach for Text.index_of when you also want where it matched.
Parameters
sthe string to searchsubthe substring to look forExample
program Filter {
var line: string = "error: disk full"
handler Scan phase Update {
if Text.contains(line, "error") {
# flag it
}
}
}