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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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What does `:_*` (colon underscore star) do in Scala?
I have the following piece of code from this question :
4 Answers
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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...
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...
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：...
Passing parameters to a Bash function
... in the old implementation (it's in the issues on GitHub). Haven't had the time to integrate the new version yet back into Bash Infinity. Glad to hear it's been helpful.
– niieani
Feb 28 '18 at 18:14
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Rails 4 LIKE query - ActiveRecord adds quotes
I am trying to do a like query like so
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