小编Mat*_*van的帖子

我在Cordova应用程序中使用localForage.

我想知道localforage的大小.基本上它被称为5mb限制.我的移动应用程序中将有超过100mb的数据.

var DefaultConfig = {
    description: '',
    driver: DefaultDriverOrder.slice(),
    name: 'localforage',
    // Default DB size is _JUST UNDER_ 5MB, as it's the highest size
    // we can use without a prompt.
    size: 4980736,
    storeName: 'keyvaluepairs',
    version: 1.0
};

大小是4980736字节,这是4.9MB ..如果我增加到100mb,它支持吗？

使用webpack > 5版本。下面是我的appDevMiddleware.js配置

const path = require('path');
const webpack = require('webpack');
const webpackDevMiddleware = require('webpack-dev-middleware');
const webpackHotMiddleware = require('webpack-hot-middleware');

function createWebpackMiddleware(compiler, publicPath) {
return webpackDevMiddleware(compiler, {
    // noInfo: true,
    publicPath,
    // silent: true,
    stats: 'errors-only',
});
}

module.exports = function addDevMiddlewares(app, webpackConfig) {
const compiler = webpack(webpackConfig);
const middleware = createWebpackMiddleware(compiler, webpackConfig.output.publicPath);

app.use(middleware);
app.use(webpackHotMiddleware(compiler));

// Since webpackDevMiddleware uses memory-fs internally to store build
// artifacts, we use it instead
const fs = middleware.fileSystem;

app.get('*', (req, res) …

我正在使用javascript,php,mysql.
我在'index.php'上有一个按钮.单击此按钮(而不是新选项卡)将打开一个新窗口
.代码是这样的.

function getUtilities(sid,sfname,smobnum,subdid)
{   
   var url='';
   url="update.php?sid="+sid+"&sfname="+sfname+"&smobnum="+smobnum+"&subdid="+subdid;
   popupNote(url);  
}


function popup(url)
{
 var width  = 500;
 var height = 200;
 var left   = (screen.width  - width)/2;
 var top    = (screen.height - height)/2;
 var params = 'width='+width+', height='+height;
 params += ', top='+top+', left='+left;
 params += ', directories=no';
 params += ', location=no';
 params += ', menubar=no';
 params += ', resizable=no';
 params += ', scrollbars=yes';
 params += ', status=no';
 params += ', toolbar=no';
 newwin=window.open(url,'windowname5', params);
 if (window.focus) {newwin.focus()}
 return false;
} …

这是我的阵列

[
  {    
    "id": 2,
    "language": {
      "name": "English",
      "abbreviation": "EN"
  }
]  

访问 language.name

function get(arrName)
{
    for(var k = 0 ; k< arr.length; k++)
    {
        console.log(arr[k].language.name); //English
    }
}

在arr[k].language.name,我想把'language'字符串作为动态,我从函数的参数中得到它arrName.应该如此

function get(arrName)
{
    for(var k = 0 ; k< arr.length; k++)
    {
        var dynamicArr = '.'+arrName+'.name';
        console.log(arr[k]+dynamicArr);
    }
}

在这里显示

[object Object].language.name;

如何获得实际的数组值？

我在数组下面的对象

    [
    {
        "age":32,
        "test":true
    },
    {
        "age":33,
        "test":true
    },
    {
        "age":35,
        "test":false
    }
]

我需要检查是否所有值test都是false.

我试过下面的代码

Array.isArray(obj.map((message,index) => {
      if(message.test !== message.test){
          //trigger when all values are false
      }
}))

怎么做到这一点？

我有一个逗号分隔的刺

var str = "-1,opt1,opt2,opt3,opt4,opt5";

我想将这些值附加到我的选择下拉列表中，以便看起来像

<select>
   <option value="-1">-Select-</option>
   <option value="opt1">opt1</option>
   <option value="opt2">opt2</option>
   <option value="opt3">opt3</option>
   <option value="opt4">opt4</option>
   <option value="opt5">opt5</option>
</select>

我尝试将字符串放入我的选择中

 $.each(str, function(key, value) { 
    $('#sel').append('<option value="'+value+'">'+key+'</option>');
});

现在，这会将每个字符串作为选项值。但是如上所述，我如何将每个选项作为一个选项。