lib/polars/utils.rb in polars-df-0.1.4 vs lib/polars/utils.rb in polars-df-0.1.5

@@ -9,10 +9,14 @@
 
     def self.wrap_df(df)
       DataFrame._from_rbdf(df)
     end
 
+    def self.wrap_ldf(ldf)
+      LazyFrame._from_rbldf(ldf)
+    end
+
     def self.wrap_expr(rbexpr)
       Expr._from_rbexpr(rbexpr)
     end
 
     def self.col(name)
@@ -168,8 +172,20 @@
       end
     end
 
     def self.bool?(value)
       value == true || value == false
+    end
+
+    def self._is_iterable_of(val, eltype)
+      val.all? { |x| x.is_a?(eltype) }
+    end
+
+    def self.is_str_sequence(val, allow_str: false)
+      if allow_str == false && val.is_a?(String)
+        false
+      else
+        val.is_a?(Array) && _is_iterable_of(val, String)
+      end
     end
   end
 end