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What are the rules about using an underscore in a C++ identifier?
...e allowed to add template specializations, though.)
From the 2003 C++ Standard:
17.4.3.1.2 Global names [lib.global.names]
Certain sets of names and function signatures are always reserved to the implementation:
Each name that contains a double underscore (__) or begins with an u...
Why do we usually use || over |? What is the difference?
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If you use the || and && forms, rather than the | and & forms of these operators, Java will not bother to evaluate the right-hand operand alone.
It's a matter of if you want to short-circuit the evaluation or not -- most of the ti...
Java 32-bit vs 64-bit compatibility
Will Java code built and compiled against a 32-bit JDK into 32-bit byte code work in a 64-bit JVM? Or does a 64-bit JVM require 64-bit byte code?
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Getting scroll bar width using JavaScript [duplicate]
...inJS apps
document.body.appendChild(outer);
// Creating inner element and placing it in the container
const inner = document.createElement('div');
outer.appendChild(inner);
// Calculating difference between container's full width and the child width
const scrollbarWidth = (outer.offset...
When to use margin vs padding in CSS [closed]
...lar rule or guideline that should be used in deciding when to use margin and when to use padding ?
16 Answers
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PHP DateTime::modify adding and subtracting months
I've been working a lot with the DateTime class and recently ran into what I thought was a bug when adding months. After a bit of research, it appears that it wasn't a bug, but instead working as intended. According to the documentation found here :
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Difference between Mutable objects and Immutable objects [duplicate]
Any one please give the diff between Mutable objects and Immutable objects with example.
5 Answers
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Make $JAVA_HOME easily changable in Ubuntu [closed]
In Ubuntu, I'd like to switch my JAVA_HOME environment variable back and forth between Java 5 and 6.
8 Answers
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Any reason not to use '+' to concatenate two strings?
...e Python interpreter has to create a new string object for each iteration, and it ends up taking quadratic time. (Recent versions of CPython can apparently optimize this in some cases, but other implementations can't, so programmers are discouraged from relying on this.) ''.join is the right way t...
What is the better API to Reading Excel sheets in java - JXL or Apache POI [closed]
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I have used both JXL (now "JExcel") and Apache POI. At first I used JXL, but now I use Apache POI.
First, here are the things where both APIs have the same end functionality:
Both are free
Cell styling: alignment, backgrounds (colors and patterns), borders
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