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What does `:_*` (colon underscore star) do in Scala?
I have the following piece of code from this question :
4 Answers
4
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Why does NULL = NULL evaluate to false in SQL server
...QL-based DBMSes often do not respect even 3VL, they give wrong answers sometimes (as, the original poster assert, SQL Server do in this case).
So I reiterate: SQL does not any good forcing one to interpret the reflexive property of equality, which state that:
for any x, x = x §§ (in plain En...
How to convert floats to human-readable fractions?
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Note this algorithm takes Ω(m) time when f = n/m . And that could be a lot, even if you didn't intend it to be (consider 0.66666666667).
– einpoklum
Mar 26 '16 at 23:53
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How can I pass command-line arguments to a Perl program?
I'm working on a Perl script. How can I pass command line parameters to it?
9 Answers
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Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...理，还支持版本和调试等功能。中文帮助在这儿：http://support.google.com/tagmanager/?hl=zh-Hans，国外的话，之前也有很多类似的商业产品。
在正式使用Tag Manager之前，我们先看看没有这个工具之前，我们是如何管理Tag脚本的。
Step 1：...
Rails 4 LIKE query - ActiveRecord adds quotes
I am trying to do a like query like so
7 Answers
7
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Is there a way to create your own html tag in HTML5?
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Sometimes... new standards need to be set. ;-)
– Timothy Perez
Aug 22 '12 at 6:38
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NSOperation vs Grand Central Dispatch
...D. (Examples: bandwidth-constrained queues that only run N operations at a time; establishing dependencies between operations. Both very simple with NSOperation, very difficult with GCD.) Apple's done the hard work of leveraging GCD to create a very nice object-friendly API with NSOperation. Take a...
Escaping a forward slash in a regular expression
My question is a simple one, and it is about regular expression escaping. Do you have to escape a forward slash / in a regular expression? And how would you go about doing it?
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What is the most effective way for float and double comparison?
...of the other suggestions. It all depends on context.
I have spent a long time tracing a bugs in a system that presumed a==b if |a-b|<epsilon. The underlying problems were:
The implicit presumption in an algorithm that if a==b and b==c then a==c.
Using the same epsilon for lines measured in i...