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Why would I use Scala/Lift over Java/Spring? [closed]
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Let's assume we're equally comfortable in Scala and Java, and ignore the (huge) language differences except as they pertain to Spring or Lift.
Spring and Lift are almost diametrically opposed in terms of maturity and goals.
Spring is about five year...
In Java, what is the best way to determine the size of an object?
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You can use the java.lang.instrument package
Compile and put this class in a JAR:
import java.lang.instrument.Instrumentation;
public class ObjectSizeFetcher {
private static Instrumentation instrumentation;
public static void premain(String args, Instrumenta...
How to install mongoDB on windows?
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It's not like WAMP. You need to start mongoDB database with a command after directory has been created C:/database_mongo
mongod --dbpath=C:/database_mongo/
you can then connect to mongodb using commands.
share...
Difference between volatile and synchronized in Java
...anything that was visible to thread A when it writes to volatile field f becomes visible to thread B when it reads f.
-- JSR 133 (Java Memory Model) FAQ
So, now both forms of memory barrier (under the current JMM) cause an instruction re-ordering barrier which prevents the compiler or run-tim...
Clang vs GCC - which produces faster binaries? [closed]
... runs 1% faster, or Clang binaries take up more memory or just fail due to compiler bugs, it's a deal-breaker.
7 Answers
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Difference between `constexpr` and `const`
...ntee that once initialized, the value of that object won't change, and the compiler can make use of this fact for optimizations. It also helps prevent the programmer from writing code that modifies objects that were not meant to be modified after initialization.
constexpr declares an object as fit ...
Swift Beta performance: sorting arrays
...rn abs_to_nanos(abs) / (double)NANOS_PER_SEC;
}
Here is a summary of the compiler's optimazation levels:
[-Onone] no optimizations, the default for debug.
[-O] perform optimizations, the default for release.
[-Ofast] perform optimizations and disable runtime overflow checks and runtime type c...
What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]
...JVM's particular implementation of the concept of string interning:
In computer science, string interning
is a method of storing only one copy
of each distinct string value, which
must be immutable. Interning strings
makes some string processing tasks
more time- or space-efficient at t...
How does JavaScript .prototype work?
... use of the word "prototype" is the source of endless confusion amongst newcomers to the language.
Using new with constructor functions allows us to simulate classical inheritance in JavaScript; although JavaScript's inheritance system is - as we have seen - prototypical, and not class-based.
Prio...
Markup XML解析库下载（Markup.h 和 Markup.cpp） - 源码下载 - 清泛网 - 专注C/C++及内核技术
...rst Objective Software, Inc. All rights reserved
// Go to www.firstobject.com for the latest CMarkup and EDOM documentation
// Use in commercial applications requires written permission
// This software is provided "as is", with no warranty.
#if !defined(_MARKUP_H_INCLUDED_)
#define _MARKUP_H...