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UIDevice uniqueIdentifier deprecated - What to do now?
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A UUID created by CFUUIDCreate is unique if a user uninstalls and re-installs the app: you will get a new one each time.
But you might want it to be not unique, i. e. it should stay the same when the user uninstalls and re-ins...
UUID max character length
We are using UUID as primary key for out oracle DB, and trying to determine an appropriate max character length for the VARCHAR. Apparently this is 36 characters but we have noticed UUID'S generated which are longer than this - up to 60 characters in length.
Does anyone know a suitable max char leng...
Generate a random alphanumeric string in Cocoa
...yourself to hex characters only, then the simplest option is to generate a UUID:
NSString *uuid = [NSUUID UUID].UUIDString;
Example output: 16E3DF0B-87B3-4162-A1A1-E03DB2F59654.
If you want a smaller random string then you can grab just the first 8 characters.
It's a version 4 UUID which means ...
Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...投递代理的参数来覆盖该缺省值。如用smtpd_recipient_limit来指定smtp投递代理可以将同一封邮件发送给多少个收件人，该参数的缺省值为1000。
4． 推迟投递控制
通过defer_transports参数，我们可以推迟投递该参数指定的邮件直到pos...
Likelihood of collision using most significant bits of a UUID in Java
If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so there is a possibility that you run into a collision, right?
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ListView/ListPicker搜索框字体大小无法设置？源码分析与解决方案 - App应...
ListView/ListPicker搜索框字体大小无法设置？源码分析与解决方案
一、问题现象
很多开发者发现：ListView组件开启ShowFilterBar后，搜索框的提示文本（HintText）字体太大，非常不美观。但翻遍了所有属性，都找不到设置搜索框字...
搜狗广告研发部：搜索大数据驱动市场营销 - 资讯 - 清泛网 - 专注C/C++及内核技术
搜狗广告研发部：搜索大数据驱动市场营销内容大纲大数据影响，营销领域搜狗搜索大数据，每天，数亿的网民通过各种设备，在搜狗搜索表达搜索意愿汽车行业相关搜索词：10万左右的车排...
内容大纲
大数据影响，营销领...
How to generate a random alpha-numeric string?
...less likely than undetected errors from cosmic rays, etc.
Comparison with UUIDs
According to their specification, UUIDs are not designed to be unpredictable, and should not be used as session identifiers.
UUIDs in their standard format take a lot of space: 36 characters for only 122 bits of entro...
【PM干货】2015年阿里业务型PM笔试题 - 项目管理 - 清泛网 - 专注C/C++及内核技术
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1、最近大数据非常的火热，而请问如何利用大数据与搜索引擎结合，为用户提供更好的产品或服务。
大致答案构成：将大数据分为几个类型，向不同的用户提供不同的类型组合构成新的产品或者服务。
考后再一回想，其...
AppInventor做的APP支持安卓14吗？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
目前MIT最新版本也是Android13，我们与mit同步更新。如果官方支持14我们会第一时间跟进。
不过，根据用户反馈，蓝牙相关的好像不兼容~
有关安卓 14 的补充：根据反馈，安卓14支持蓝牙功能，不过需要手动开启相关权限