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Zero-pad digits in string
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First of all, your description is misleading. Double is a floating point data type. You presumably want to pad your digits with leading zeros in a string. The following code does that:
$s = sprintf('%02d', $digit);
For more informa...
Getting the location from an IP address [duplicate]
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You could download a free GeoIP database and lookup the IP address locally, or you could use a third party service and perform a remote lookup. This is the simpler option, as it requires no setup, but it does introduce additional latency.
One third party service you could use is mine, http://...
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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推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...单，而且很多时候推荐也是很准确的。然而它也存在一些问题：
依赖于准确的用户评分；
在计算的过程中，那些大热的物品会有更大的几率被推荐给用户；
冷启动问题。当有一名新用户或者新物品进入系统时，推荐将无从依...
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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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
程序员之网络安全系列（五）：数字证书以及12306的证书问题前文回顾假如，明明和丽丽相互不认识，明明想给丽丽写一封情书，让隔壁老王送去如何保证隔壁老王不能看到情书内容？（保密性)如何保证隔壁...前文回顾
假如，...
How are POST and GET variables handled in Python?
... self.response.write(name) # this will write on the document
So you really will have to choose one of those frameworks.
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Absolute vs relative URLs
...ed Jan 5 '10 at 9:33
Daniel VassalloDaniel Vassallo
301k6666 gold badges475475 silver badges424424 bronze badges
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Vsphere 6 集群上 安装 oracle rac 遇到的共享磁盘故障 - 数据库(内核) - ...
...。但是 oracle 启动不了。
分析
经过3天的测试，找问题，依然没有完全解决问题， 从三天的测试结果来看 无非是 SCSI 总线， SCSI 共享总线，和 磁盘锁定，多点写入参数的组合
实验结果如下
SCSI 总线
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Insert current date in datetime format mySQL
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NOW() is used to insert the current date and time in the MySQL table. All fields with datatypes DATETIME, DATE, TIME & TIMESTAMP work good with this function.
YYYY-MM-DD HH:mm:SS
Demonstration:
Following code shows the usage of NOW()
INSERT INTO auto_ins
(MySQL_Function, DateTime, Date,...