## Usage ```javascript var dtypeChars = require( '@stdlib/ndarray/base/dtype-chars' ); ``` #### dtypeChars( \[kind] ) Returns a list of ndarray data type single letter character abbreviations. ```javascript var out = dtypeChars(); // e.g., returns [ 'r', 'j', 'c', 'z', ... ] ``` When not provided a data type "kind", the function returns an array containing the single letter character abbreviations for all supported ndarray [data types][@stdlib/ndarray/dtypes]. To return the subset of data type single letter character abbreviations belonging to a specified data type kind, provide a `kind` argument. ```javascript var out = dtypeChars( 'floating_point' ); // returns [...] ``` The function supports the following data type kinds: - `floating_point`: floating-point data types. - `real_floating_point`: real-valued floating-point data types. - `complex_floating_point`: complex-valued floating-point data types. - `boolean`: boolean data types. - `integer`: integer data types. - `signed_integer`: signed integer data types. - `unsigned_integer`: unsigned integer data types. - `real`: real-valued data types. - `numeric`: numeric data types. - `typed`: typed data types. - `integer_index`: integer index data types. - `boolean_index`: boolean index data types. - `mask_index`: mask index data types. - `typed_index`: typed index data types. - `index`: index data types. - `all`: all data types. Additionally, the function supports extending the "kinds" listed above by appending an `_and_generic` suffix to the kind name (e.g., `real_and_generic`). ```javascript var out = dtypeChars( 'floating_point_and_generic' ); // returns [...] ```

## Examples ```javascript var contains = require( '@stdlib/array/base/assert/contains' ).factory; var dtypeChars = require( '@stdlib/ndarray/base/dtype-chars' ); var isdtypeChar = contains( dtypeChars() ); var bool = isdtypeChar( 'd' ); // returns true bool = isdtypeChar( 'k' ); // returns true bool = isdtypeChar( 'b' ); // returns true bool = isdtypeChar( '~' ); // returns false ```