我发现默认情况下,带有10 rem you can set up n in advance here
20 n = 23
30 gosub 50
40 rem n is now 24
50 rem start of subroutine; this line is not needed, it's just here for clarity
60 n=n+1
70 print n
80 return
90 rem now you can call the subroutine on line 50 and it'll return at line 80
指令的Angular不会在输入中显示ng-model
值:
NaN
因此,如果<input type="number" class="form-control" id="calcmouldSugNOfCavitiesCost" disabled
step=0.01
ng-model="$parent.mouldTAB.sugNOfCavitiesCost">
等于$parent.mouldTAB.sugNOfCavitiesCost
,则输入为空。
我希望展示NaN
而不是此行为。
有可能吗?
答案 0 :(得分:2)
要达到预期效果,请使用以下选项
选项1:
1,将输入类型更改为文本
2.检查输入类型,如果字符串设置输入的默认值为&#39; NaN&#39;
HTML:
<html>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<input type="text" id="calcmouldSugNOfCavitiesCost" disabled
ng-model="sugNOfCavitiesCost">
</div>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
JS:
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.sugNOfCavitiesCost ='123';
if(typeof($scope.sugNOfCavitiesCost)=='string'){
$scope.sugNOfCavitiesCost ='NaN';
}
});
Codepen- http://codepen.io/nagasai/pen/jAYoxv
选项2:
要使用现有代码输入字段作为数字来实现预期结果,请再添加一个文本字段以显示&#39; NaN&#39;包含字符串值并使用ng-show和ng-hide根据值
显示输入字段HTML:
<div ng-app="myApp" ng-controller="myCtrl">
<input type="number" id="calcmouldSugNOfCavitiesCost" disabled ng-model="sugNOfCavitiesCost" ng-hide="toggle">
<input type="text" disabled value="NaN" ng-show="toggle">
</div>
JS:
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.sugNOfCavitiesCost ='123';
if(typeof($scope.sugNOfCavitiesCost)=='string'){
console.log($scope);
$scope.toggle =true;
}
});
Codepen- http://codepen.io/nagasai/pen/xOpNrw
答案 1 :(得分:0)
好吧,因为它是<input type="number">
,所以它不能包含NaN
作为值。
输入类型编号只能包含numbers
,字母“e”或符号(+ / - )。
另一方面,您可以使用text type
,这样您就可以检查控制器中的值是否为空,然后您可以将NaN
归属于它,如下所示:
(function() {
"use strict";
angular.module('app', [])
.controller('mainCtrl', function($scope) {
$scope.test = '';
if (!$scope.test) {
$scope.test = "NaN";
}
});
})();
<html ng-app="app">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.7/angular.min.js"></script>
</head>
<body ng-controller="mainCtrl">
<input type="text" class="form-control" id="calcmouldSugNOfCavitiesCost" ng-model="test" disabled>
</body>
</html>
我希望它有所帮助。