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TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
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磁盘消耗对比:
选择MongoDB就必然会面对磁盘消耗的问题。我们拿到的数据大概是这样的:每天的数据量不到200万条,平均数据的大小不超过4k,但MongoDB存一个月的数据就需要接近40G,最近三个月的数据则需要接近100G。限...
Should I URL-encode POST data?
I'm POSTing data to an external API (using PHP, if it's relevant).
4 Answers
4
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How to prevent a jQuery Ajax request from caching in Internet Explorer?
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You can disable caching globally using $.ajaxSetup(), for example:
$.ajaxSetup({ cache: false });
This appends a timestamp to the querystring when making the request. To turn cache off for a particular $.ajax() call, set cache: false on it locally, ...
App Inventor 2 经典蓝牙(SPP) 硬件接入:hc05 · App Inventor 2 中文网
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HC05 简单介绍
基本接入代码参考
常见问题解决
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned on?
乱码问题排查思路
参与讨论
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经典蓝...
设备选择器(DevicePicker)使用指导 · App Inventor 2 中文网
... 案例二:释放选择器
参数与返回值速查
常见问题与验收
完整 .aia 源码与操作指导
附近设备选择与状态回报
设备选择器组件 - 弹出鸿蒙系统级设备选择器UI。
鸿蒙独有组件,基...
Send email using the GMail SMTP server from a PHP page
I am trying to send an email via GMail's SMTP server from a PHP page, but I get this error:
14 Answers
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download file using an ajax request
...n as your site.
You could always make the AJAX request/window.location a fallback by using some JavaScript to test if download is supported and if not, switching it to call window.location.
Original answer
You can't have an AJAX request open the download prompt since you physically have to naviga...
宽度默认980px?手机浏览器及pc浏览器width自适应问题 - 更多技术 - 清泛网...
宽度默认980px?手机浏览器及pc浏览器width自适应问题Tips: 调试 iPad 或 iPhone 可在设置中启动调试模式,在 Mac 中的 Safari 浏览器 同样开启开发者模式后,进行联机调试。功能彪悍...Tips: 调试 iPad 或 iPhone 可在设置中启动调试模式,...
How to force the browser to reload cached CSS/JS files?
...write if there are exactly 10 digits at the end. (Because 10 digits covers all timestamps from 9/9/2001 to 11/20/2286.)
First, we use the following rewrite rule in .htaccess:
RewriteEngine on
RewriteRule ^(.*)\.[\d]{10}\.(css|js)$ $1.$2 [L]
Now, we write the following PHP function:
/**
* Give...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...定的局部性的特征,利用局部性的原理将海量数据计算的问题分而治之。
MR模型是无共享的架构,数据集分布至各个节点。处理时,每个节点就近读取本地存储的数据处理(map),将处理后的数据进行合并(combine)、排序(shuffle and so...
