Method: Polars::StringExpr#strip_prefix

Defined in:
lib/polars/string_expr.rb

#strip_prefix(prefix) ⇒ Expr

Remove prefix.

The prefix will be removed from the string exactly once, if found.

Examples:

df = Polars::DataFrame.new({"a" => ["foobar", "foofoobar", "foo", "bar"]})
df.with_columns(Polars.col("a").str.strip_prefix("foo").alias("stripped"))
# =>
# shape: (4, 2)
# ┌───────────┬──────────┐
# │ a         ┆ stripped │
# │ ---       ┆ ---      │
# │ str       ┆ str      │
# ╞═══════════╪══════════╡
# │ foobar    ┆ bar      │
# │ foofoobar ┆ foobar   │
# │ foo       ┆          │
# │ bar       ┆ bar      │
# └───────────┴──────────┘

Parameters:

  • prefix (String) —

    The prefix to be removed.

Returns:



623
624
625
626
 
# File 'lib/polars/string_expr.rb', line 623

def strip_prefix(prefix)
  prefix = Utils.parse_into_expression(prefix, str_as_lit: true)
  Utils.wrap_expr(_rbexpr.str_strip_prefix(prefix))
end