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What is an EJB, and what does it do?
Been trying to learn what EJB beans are, what does it mean their instances are managed in a pool, blah blah. Really can't get a good grip of them.
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Java generics type erasure: when and what happens?
...data in the class file to say whether or not a method/type is generic, and what the constraints are etc. But when generics are used, they're converted into compile-time checks and execution-time casts. So this code:
List<String> list = new ArrayList<String>();
list.add("Hi");
String x =...
What is the difference between `throw new Error` and `throw someObject`?
...bout The Error object and throwing your own errors
The Error Object
Just what we can extract from it in an event of an error? The Error object in all browsers support the following two properties:
name: The name of the error, or more specifically, the name of the constructor function the error b...
What special characters must be escaped in regular expressions?
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what about colon, ":"? Shall it be escaped inside character classes as well as outside? en.wikipedia.org/wiki/Perl_Compatible_Regular_Expressions says "PCRE has consistent escaping rules: any non-alpha-numeric character may b...
What's the difference between `1L` and `1`?
I often seen the symbol 1L (or 2L , 3L , etc) appear in R code. Whats the difference between 1L and 1 ? 1==1L evaluates to TRUE . Why is 1L used in R code?
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What's the difference between backtracking and depth first search?
What's the difference between backtracking and depth first search?
13 Answers
13
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What is the use of hashCode in Java?
In Java, obj.hashCode() returns some value. What is the use of this hash code in programming?
9 Answers
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What's default HTML/CSS link color?
...values did come from a standard, for which this answer provides no sources whatsoever, that standard would have long been obsolete anyway as this answer implies, and using it in new code would be meaningless.
– BoltClock♦
May 4 '14 at 13:25
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What's the difference between ISO 8601 and RFC 3339 Date Formats?
...3339 specify rather than require - it's the context of use that determines what is required. As long as it's clear what is intended, then referencing a specific syntax production is fine. (This is not really different to what RFC3339 itself does in making selective reference to ISO8601.) See also...
What's an object file in C?
...am reading about libraries in C but I have not yet found an explanation on what an object file is. What's the real difference between any other compiled file and an object file?
I would be glad if someone could explain in human language.
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