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How does one make random number between range for arc4random_uniform()?
so my goal in this codebit is to randomly roll two dice and as we all know your regular die only has 6 sides so I imported Foundation for access to arc4random_uniform(UInt32). I attempted using the range of (1..7) to avoid randomly getting 0 however that returned an error which I didn't enjoy too mu...
Skip List vs. Binary Search Tree
...s the data structure known as a skip list . It seems to have very similar behavior to a binary search tree.
7 Answers
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How can I convert ereg expressions to preg in PHP?
...e to know an easy way to convert the old expressions to PCRE (Perl Compatible Regular Expressions) (preg) .
4 Answers
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How can I represent an 'Enum' in Python?
I'm mainly a C# developer, but I'm currently working on a project in Python.
43 Answers
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How to validate an email address in JavaScript
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Using regular expressions is probably the best way. You can see a bunch of tests here (taken from chromium)
function validateEmail(email) {
const re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}...
Visual Studio jump to next error shortcut?
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F8 (and Shift+F8 to go backwards).
Or at least that's what it is in my keyboard profile - you can go to tools\options\environment\keyboard and check out Edit.GoToNextLocation.
Note If you configured Visual Studio using VB keyboard settings, no...
How to dismiss notification after action has been clicked
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When you called notify on the notification manager you gave it an id - that is the unique id you can use to access it later (this is from the notification manager:
notify(int id, Notification notification)
To cancel, you would call:
cancel(int id)
with the same id. ...
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 - ...
...来说，就是指”Symantec Corporation”这个机构。
Not valid before, Not valid after (证书的有效期)
Public key (公钥)
这个我们在前面介绍公钥密码体制时介绍过，公钥是用来对消息进行加密的。
Subject (主题)
这个证书是发布给...
How do you create a Distinct query in HQL
Is there a way to create a Distinct query in HQL. Either by using the "distinct" keyword or some other method. I am not sure if distinct is a valid keywork for HQL, but I am looking for the HQL equivalent of the SQL keyword "distinct".
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Why do we not have a virtual constructor in C++?
...y don't we have virtual constructors?
A virtual call is a mechanism to get work done given partial
information. In particular, "virtual" allows us to call a function
knowing only any interfaces and not the exact type of the object. To
create an object you need complete information. In part...