小编Ved*_*ash的帖子

这是我的Javascript代码

function upload(){
var byteCharacters = atob($scope.image1.compressed.dataURL.replace(/^data:image\(png|jpg);base64,/,''));
var byteNumbers = new Array(byteCharacters.length);
         for (var i = 0; i < byteCharacters.length; i++) {
          byteNumbers[i] = byteCharacters.charCodeAt(i);
         }
var byteArray = new Uint8Array(byteNumbers);
 var blob = new Blob([ byteArray ], {
     type : undefined
   });

这是我的HTML

<div class="form-group text-16px" style="margin-top: 20px !important;">
    <label>Choose Material Photo : </label>
    <div>
    <input id="materialImage" type="file" accept="image/*" image="image1" resize-max-height="800" resize-max-width="800" resize-quality="0.7" resize-type="image/jpg" file-model="file" name="materialImage" onChange="checkFile()" ng-image-compress/>
    <div id="choose-image-compresser">
      <div image="image1" result-image="myCompressedImage"></div>
      </div>
    <img ng-src="{{image1.compressed.dataURL}}" />
        <span id="image-size-error" …

我编写了以下代码来测试给定的输入是否为数字.

#include<iostream>
#include<ctype.h>
#include<stdio.h>
using namespace std;

main()
{
    char c;

    cout<<"Please enter a digit: ";
    cin>>c;

    if(isdigit(c)) //int isdigit(int c) or char isdigit(char c)
    {
        cout<<"You entered a digit"<<endl;
    }
    else
    {
        cout<<"You entered a non-digit value"<<endl;
    }
}      

我的问题是:输入变量类型应该是什么？char还是int？

如何禁用角度js输入标记中的特殊字符.只允许像我们一样使用字母数字

<input type="text" ng-trim="false" style="text-transform: uppercase" ng-pattern="/^[a-zA-Z0-9]*$/" class="form-text" id="pan_card_number" name="pan_card_number" ng-minlength="10" maxlength="10" required ng-model="registration.newTSP.panCardNumber">