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Справка Scilab >> Tcl/Tk Interface > TCL_ExistVar

TCL_ExistVar

Return %T if a tcl variable exists

Syntax

OK=TCL_ExistVar(varname [,interp])

Arguments

varname

character string. Contains the name of the tcl/tk variable.

interp

optional character string parameter. Name of the slave tcl interpreter in which the operation has to be performed. If not provided, it defaults to the main tcl interpreter created by Scilab.

ok

boolean. %T if varname exists.

Description

This routine allows to test if a tcl variable exists.

More information about Tcl/Tk: http://www.tcl.tk/doc/

Examples

TCL_SetVar("Scilab","OK")
TCL_GetVar("Scilab")
TCL_UnsetVar("Scilab")
TCL_ExistVar("Scilab")

TCL_SetVar("aa",1)
TCL_CreateSlave('SlaveInterp');
TCL_SetVar("aa",2,'SlaveInterp')
TCL_ExistVar("aa")
TCL_GetVar("aa")
TCL_UnsetVar("aa")
TCL_GetVar("aa",'SlaveInterp')
TCL_UnsetVar("aa",'SlaveInterp')
TCL_ExistVar("aa",'SlaveInterp')
TCL_DeleteInterp('SlaveInterp')

See also

  • ScilabEval — tcl instruction : Evaluate a string with scilab interpreter
  • TCL_EvalFile — Reads and evaluate a tcl/tk file
  • TCL_EvalStr — Evaluate a string within the Tcl/Tk interpreter
  • TCL_GetVar — Get a tcl/tk variable value
  • TCL_SetVar — Set a tcl/tk variable value
  • TCL_UnsetVar — Remove a tcl variable
  • TCL_UpVar — Make a link from a tcl source variable to a tcl destination variable
  • TCL_CreateSlave — Create a TCL slave interpreter
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Last updated:
Tue Feb 14 15:13:37 CET 2017