function char2dtype( ch ) {
	if ( arguments.length === 0 ) {
		return objectInverse( dtypeChar() );
	}
	if ( TABLE === void 0 ) {
		TABLE = objectInverse( dtypeChar() );
	}
	return TABLE[ ch ] || null;
}
Returns the data type string associated with a provided single letter abbreviation.

@param {string} ch - single letter character abbreviation
@returns {(Object|string|null)} data type string

@example
var obj = char2dtype();
// returns {...}

@example
var out = char2dtype( 'd' );
// returns 'float64'

out = char2dtype( '(' );
// returns null