Method: Polars::StringExpr#ends_with

Defined in:
lib/polars/string_expr.rb

#ends_with(sub) ⇒ Expr

Check if string values end with a substring.

Examples:

df = Polars::DataFrame.new({"fruits" => ["apple", "mango", nil]})
df.with_column(
  Polars.col("fruits").str.ends_with("go").alias("has_suffix")
)
# =>
# shape: (3, 2)
# ┌────────┬────────────┐
# │ fruits ┆ has_suffix │
# │ ---    ┆ ---        │
# │ str    ┆ bool       │
# ╞════════╪════════════╡
# │ apple  ┆ false      │
# │ mango  ┆ true       │
# │ null   ┆ null       │
# └────────┴────────────┘

Using ends_with as a filter condition:

df.filter(Polars.col("fruits").str.ends_with("go"))
# =>
# shape: (1, 1)
# ┌────────┐
# │ fruits │
# │ ---    │
# │ str    │
# ╞════════╡
# │ mango  │
# └────────┘

Parameters:

  • sub (String) —

    Suffix substring.

Returns:

[View source]

731
732
733
734
 
# File 'lib/polars/string_expr.rb', line 731

def ends_with(sub)
  sub = Utils.parse_into_expression(sub, str_as_lit: true)
  Utils.wrap_expr(_rbexpr.str_ends_with(sub))
end