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When you exit a C application, is the malloc-ed memory automatically freed?
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It depends on the operating system. The majority of modern (and all major) operating systems will free memory not freed by the program when it ends.
Relying on this is bad practice and it is better to free it explicitly. The issue isn't just that your code looks bad. You may decide y...
Java system properties and environment variables
What's the difference between system properties System.getProperties() and environment variables System.getenv() in a JVM?
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Migrating from JSF 1.2 to JSF 2.0
...SF 1.2 to 2.0 depends on the view technology which you are currently using and which you want to use.
JSP 2.x to JSP 2.x = Almost no effort.
Facelets 1.x to Facelets 2.0 = Little effort.
JSP 2.x to Facelets 2.0 = Lot of effort. Double this if you also have custom components.
Basic changes
Reg...
Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...t this error message when trying to access the database, both from the CLI and from loading a page on the server:
4 Answers...
How to test code dependent on environment variables using JUnit?
I have a piece of Java code which uses an environment variable and the behaviour of the code depends on the value of this variable. I would like to test this code with different values of the environment variable. How can I do this in JUnit?
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Why should I not include cpp files and instead use a header?
So I finished my first C++ programming assignment and received my grade. But according to the grading, I lost marks for including cpp files instead of compiling and linking them . I'm not too clear on what that means.
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What does “while True” mean in Python?
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while True means loop forever. The while statement takes an expression and executes the loop body while the expression evaluates to (boolean) "true". True always evaluates to boolean "true" and thus executes the loop body indefinitely. It's an idiom that you'll just get used to eventually! Most ...
Does Swift have access modifiers?
...e highest (least restrictive) to the lowest (most restrictive).
1. open and public
Enable an entity to be used outside the defining module (target). You typically use open or public access when specifying the public interface to a framework.
However, open access applies only to classes and clas...
Subscripts in plots in R
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How to load "2" from the variable? I have a loop and need to plot x_[1] x_[2] x_[3] ...
– 0x2207
Dec 11 '14 at 11:38
6
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Does JavaScript guarantee object property order?
... iteration order is a combination of the insertion order for strings keys, and ascending order for number-like keys:
// key order: 1, foo, bar
const obj = { "foo": "foo", "1": "1", "bar": "bar" }
Using an array or a Map object can be a better way to achieve this. Map shares some similarities with O...