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Difference between the Apache HTTP Server and Apache Tomcat? [closed]
What is the difference in terms of functionality between the Apache HTTP Server and Apache Tomcat?
8 Answers
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How to atomically delete keys matching a pattern using Redis
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Starting with redis 2.6.0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_...
Why can outer Java classes access inner class private members?
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The inner class is just a way to cleanly separate some functionality that really belongs to the original outer class. They are intended to be used when you have 2 requirements:
Some piece of functionality in your outer class would be most clear if it was implemented in a separate class....
Losing scope when using ng-include
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edited Sep 6 '17 at 10:18
user4642212
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How to avoid isset() and empty()
... the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
11 An...
What is the use of hashCode in Java?
... is the address of the element inside the set/map.
When you do contains() it will take the hash code of the element, then look for the bucket where hash code points to. If more than 1 element is found in the same bucket (multiple objects can have the same hash code), then it uses the equals() metho...
Create a unique number with javascript time
... creating a number using time. The number would be made up of the four digit year, two digit month, two digit day, two digit hour, two digit minute, two digit second, and three digit millisecond. So it would look something like this: 20111104103912732 ... this would give enough certainty of a uniq...
What's the fastest way to merge/join data.frames in R?
... and merge approaches are not the same. Match is, of course, faster since it is not doing as much. In particular it never looks for duplicate keys. (continued after code)
DF1 = data.frame(a = c(1, 1, 2, 2), b = 1:4)
DF2 = data.frame(b = c(1, 2, 3, 3, 4), c = letters[1:5])
merge(DF1, DF2)
b a c...
How does the Java 'for each' loop work?
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for (Iterator<String> i = someIterable.iterator(); i.hasNext();) {
String item = i.next();
System.out.println(item);
}
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some wa...
How to extract img src, title and alt from html using php? [duplicate]
I would like to create a page where all images which reside on my website are listed with title and alternative representation.
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