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How can I list ALL DNS records?
... The spec has never been interpreted consistently by resolvers as to the meaning of ANY. It definitely does not mean ALL (there's a request for that), although some (not many) treated it that way. Others just dumped their cache, and others restricted it to certain record types. In modern times ...
Sass - Converting Hex to RGBa for background opacity
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To the best of my knowledge, RGBA adds opacity, meaning you can see elements behind it. With standard hex, you can't do this.
– Richard Peck
Nov 20 '15 at 21:56
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LIKE vs CONTAINS on SQL Server
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The second (assuming you means CONTAINS, and actually put it in a valid query) should be faster, because it can use some form of index (in this case, a full text index). Of course, this form of query is only available if the column is in a full text ...
Inheriting class methods from modules / mixins in Ruby
...e plain objects – they are instances of the class Class and Module. This means that you can dynamically create new classes, assign them to variables, etc.:
klass = Class.new do
def foo
"foo"
end
end
#=> #<Class:0x2b613d0>
klass.new.foo
#=> "foo"
Also in Ruby, you have the p...
Why is document.body null in my javascript?
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Thank you, what do you mean? Don't I have a body tag?
– John Hoffman
Mar 28 '12 at 22:45
5
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What is the difference between supervised learning and unsupervised learning? [closed]
...is a face.
This particular example of face detection is supervised, which means that your examples must be labeled, or explicitly say which ones are faces and which ones aren't.
In an unsupervised algorithm your examples are not labeled, i.e. you don't say anything. Of course, in such a case the a...
What is the advantage to using bloom filters?
...in the set is exactly why it is called probabilistic. Using smart words it means that false positive are possible (there can be cases where it falsely thinks that the element is positive) but false negative are impossible.
But it can't *:
remove an item from the set
give you a list of all element...
String.replaceAll single backslashes with double backslashes
...placement represent \ literal we need to escape it with additional \ which means that:
replacement must hold two backslash characters \\
and String literal which represents \\ looks like "\\\\"
BUT since we want replacement to hold two backslashes we will need "\\\\\\\\" (each \ represented by o...
What's “this” in JavaScript onclick?
What does this mean in the script?
8 Answers
8
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When is JavaScript's eval() not evil?
...s "evil". The word "evil", as used by programming language people, usually means "dangerous", or more precisely "able to cause lots of harm with a simple-looking command". So, when is it OK to use something dangerous? When you know what the danger is, and when you're taking the appropriate precautio...