Menu
How to test whether a single Unicode character is a valid variable name. The manual says:
Variable names must begin with a letter (A-Z or a-z), underscore, or a subset of Unicode code points greater than 00A0; in particular, Unicode character categories Lu/Ll/Lt/Lm/Lo/Nl (letters), Sc/So (currency and other symbols), and a few other letter-like characters (e.g. a subset of the Sm math symbols) are allowed.
Is there a function which tests a character to see if it's a valid variable name? isvalid() looks like it checks to see whether a character is a valid character, which might not be the same?
237
Variable names can be up to 64 bytes long, and the first character must be a letter or one of the characters @, #, or $. Subsequent characters can be any combination of letters, numbers, nonpunctuation characters, and a period (.).
Variables in Julia can be declared by just writing their name. There's no need to define a datatype with it. Initializing variables can be done at the time of declaring variables. This can be done by simply assigning a value to the named variable.
Variable names must be unique in a Dataset. Variable names are up to 64 characters long and can only contain letters, digits and nonpunctuation characters (except that a period (.) is allowed.
The variable name may not start with a digit or underscore, and may not end with an underscore. Double underscores are not permitted in the variable names. Hence the correct answer is White space characters.
Variable names in Julia must start with an underscore, a letter (A-Z or a-z) or a Unicode character greater than 00A0 (nbsp). Variable names can also contain digits (0-9) or !, but must not begin with these.
Julia will assign the datatype automatically to the variable. Variable names in Julia must start with an underscore, a letter (A-Z or a-z) or a Unicode character greater than 00A0 (nbsp). Variable names can also contain digits (0-9) or !, but must not begin with these.
Julia uses your system's locale and language settings to determine which characters can be printed as-is and which must be output using the generic, escaped \u or \U input forms. In addition to these Unicode escape forms, all of C's traditional escaped input forms can also be used:
In Julia, a Char (character) value represents a single character. Characters in Julia are 32-bit primitive data types. It has a special literal representation and appropriate arithmetic behaviours and these can be converted into a numeric value that represents a Unicode code point. Other subtypes of AbstractChar may be defined by Julia packages.
You can use Base.isidentifier for that:
julia> Base.isidentifier("a")
true
julia> Base.isidentifier("a′")
true
julia> Base.isidentifier("1a′")
false
julia> Base.isidentifier("â")
true
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
