我有类似的东西:
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="container">
<div class="row">
<div class="col-sm-6">
<div class="btn-group">
<button type="button" class="btn btn-default">Button 1</button>
<button type="button" class="btn btn-default">Button 2</button>
<button type="button" class="btn btn-default">Button 3</button>
</div>
<div class="btn-group">
<button type="button" class="btn btn-default">Button 4</button>
<button type="button" class="btn btn-default">Button 5</button>
<button type="button" class="btn btn-default">Button 6</button>
</div>
<div class="btn-group">
<button type="button" class="btn btn-default">Button 7</button>
<button type="button" class="btn btn-default">Button 8</button>
<button type="button" class="btn btn-default">Button 9</button>
</div>
</div>
<div class="col-sm-6">
</div>
</div>
</div>我想有3x3按钮矩阵.还有一件事,左侧和右侧必须看起来像这个例子(直线):
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="container">
<div class="btn-group-vertical">
<button type="button" …我有一个简单的函数在数字前添加零:
function validateString(length, str){
var newStr = '' + str;
for (var i = str.length; i < length; i++)
newStr = '0' + newStr;
return newStr;
}
我需要更改什么(变量的类型？)以使其适用于数字？
validateString(12,2);
"2" // Unexpected rezult
validateString(12,'2');
"000000000002"