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Remove element of a regular array
I have an array of Foo objects. How do I remove the second element of the array?
15 Answers
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Using GPU from a docker container?
I'm searching for a way to use the GPU from inside a docker container.
9 Answers
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Best way to test for a variable's existence in PHP; isset() is clearly broken
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If the variable you are checking would be in the global scope you could do:
array_key_exists('v', $GLOBALS)
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Create or write/append in text file
I have a website that every time a user logs in or logs out I save it to a text file.
7 Answers
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Dynamic Anonymous type in Razor causes RuntimeBinderException
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Anonymous types having internal properties is a poor .NET framework design decision, in my opinion.
Here is a quick and nice extension to fix this problem i.e. by converting the anonymous object into an ExpandoObject right away....
Error installing mysql2: Failed to build gem native extension
I am having some problems when trying to install mysql2 gem for Rails. When I try to install it by running bundle install or gem install mysql2 it gives me the following error:
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Is there an eval() function in Java? [duplicate]
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You can use the ScriptEngine class and evaluate it as a Javascript string.
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("js");
Object result = engine.eval("4*5");
T...
Best timestamp format for CSV/Excel?
...to write timestamps that are accurate at least to the second, and preferably to the millisecond. What's the best format for timestamps in a CSV file such that they can be parsed accurately and unambiguously by Excel with minimal user intervention?
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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
...，如下：
图中，行是不同的用户，列是所有物品，(x, y)的值则是x用户对y物品的评分（喜好程度）。我们可以把每一行视为一个用户对物品偏好的向量，然后计算每两个用户之间的向量距离，这里我们用余弦相似度来算：
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Converting from a string to boolean in Python?
Does anyone know how to do convert from a string to a boolean in Python? I found this link . But it doesn't look like a proper way to do it. I.e. using built-in functionality, etc.
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