isfield
checks if the given fieldname exists in a structure or mlist or tlist
Syntax
bool = isfield(s, fieldname)
Arguments
- s
a struct array, a tlist or a mlist.
- fieldname
a matrix of strings: names of fields to be detected
- bool
a matrix of boolean (same format as
fieldname>
)
Description
This function returns %t
if the specified structure or tlist or mlist s
includes the field fieldname
, regardless of the corresponding value. For a structure, the hidden field dims
is ignored.
Examples
s = struct("field_1",123,"field_2",456,"field_4",789) // Single Fieldname Syntax isfield( s , "field_1" ) // Multiple Fieldname Syntax isfield( s , [ "field_1" "field_2" ; "field_3" "field_4" ] ) // with a tlist: s = tlist(["test" "t" "n","","p"], "Hello", %pi, "anonymous", (1-%z)^3) isfield(s, ["b" "t" ""]) // => F T T (anonymous fields can be detected)
See also
- struct — Builds a structure or an array of structures
- tlist — objeto do Scilab e definição de listas com tipos ("typed lists")
- mlist — objeto Scilab, definição de listas com tipos orientadas matricialmente
- getfield — extração de campos de listas
- definedfields — retorna o índice dos campos definidos de uma lista
History
Versão | Descrição |
5.5 | Extension to any mlist and tlist. |
Report an issue | ||
<< getfield | Estruturas de Dados | isstruct >> |