Angular JS tamaño de un array lenght size array

$scope.lsCanasta = [
	"p1",
	"p2",
	"p3",
	"p4",
	"p5"
];

if(($scope.lsCanasta).length>0){
	$("#btcontratar").removeClass("bt-disabled");
	$("#btcontratar").removeAttr("disabled");			
}else{
	$("#btcontratar").addClass("bt-disabled");
	$("#btcontratar").attr("disabled", "disabled");			
}

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