Expr.Name (NameOps)

Namespace: Polars.CSharp

Offers methods for renaming columns.

Instance Methods

Keep

Keep the original root name of the expression.

public Expr Keep()

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Map

Rename the output of an expression by mapping a function over the root name.

public Expr Map(Func<string, string> function)

Parameters

Name	Type	Description
function	Func<string, string>	Function that maps a root name to a new name.

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MapFields

Rename fields of a struct by mapping a function over the field name(s).

public Expr MapFields(Func<string, string> function)

Parameters

Name	Type	Description
function	Func<string, string>	Function that maps a field name to a new name.

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Prefix

Prefix the column name with a specified string.

public Expr Prefix(string prefix)

Parameters

Name	Type	Description
prefix	string	-

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PrefixFields

Add a prefix to all field names of a struct.

public Expr PrefixFields(string prefix)

Parameters

Name	Type	Description
prefix	string	Prefix to add to the field name.

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Replace

Replace matching regex/literal substring in the name with a new value.

public Expr Replace(string pattern, string value, bool literal = false)

Parameters

Name	Type	Description
pattern	string	A valid regular expression pattern, compatible with the regex crate.
value	string	String that will replace the matched substring.
literal	bool	Treat pattern as a literal string, not a regex.

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Suffix

Suffix the column name with a specified string.

public Expr Suffix(string suffix)

Parameters

Name	Type	Description
suffix	string	-

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SuffixFields

Add a suffix to all field names of a struct.

public Expr SuffixFields(string suffix)

Parameters

Name	Type	Description
suffix	string	Suffix to add to the field name.

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ToLowercase

Make the root column name lowercase.

public Expr ToLowercase()

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ToUppercase

Make the root column name uppercase.

public Expr ToUppercase()

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