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Why can't C# interfaces contain fields?
For example, suppose I want an ICar interface and that all implementations will contain the field Year . Does this mean that every implementation has to separately declare Year ? Wouldn't it be nicer to simply define this in the interface?
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How to really read text file from classpath in Java
...me classloader, you should be able to use either of:
// From ClassLoader, all paths are "absolute" already - there's no context
// from which they could be relative. Therefore you don't need a leading slash.
InputStream in = this.getClass().getClassLoader()
.getResou...
Why is there no logical xor in JavaScript?
...r. Mainly because it's not useful. Bitwise XOR is extremely useful, but in all my years of programming I have never needed a logical XOR.
If you have two boolean variables you can mimic XOR with:
if (a != b)
With two arbitrary variables you could use ! to coerce them to boolean values and then u...
Meaning of “[: too many arguments” error from if [] (square brackets)
...
# if [ hello world == 0 ]
fi
The same will be true for any function call that puts down a string containing spaces or other special characters.
Easy fix
Wrap the variable output in double quotes, forcing it to stay as one string (therefore one argument). For example,
VARIABLE=$(/some/comm...
Is #pragma once a safe include guard?
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It shouldn't be any slower at all (with GCC anyway).
– Jason Coco
Apr 24 '09 at 21:07
54
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Which is more correct: … OR …
...th of the container the <h1> resides in) will be clickable.
Historically you could not put a block element inside of an inline element, but this is no longer the case with HTML5. I would think that the <h1><a>..</a></h1> approach is more conventional though.
In the c...
C++, copy set to vector
...hold the input range.
std::back_inserter creates an output iterator that calls push_back on a container for each element, so each element is inserted into the container. Alternatively, you could have created a sufficient number of elements in the std::vector to hold the range being copied:
std::v...
Does JavaScript guarantee object property order?
...insertion)
As a note, properties order in objects weren’t guaranteed at all before ES2015. Definition of an Object from ECMAScript Third Edition (pdf):
4.3.3 Object
An object is a member of the
type Object. It is an unordered collection of properties each of which
contains a primitive value, obj...
How to write a switch statement in Ruby
...sing the === operator. For example, 1..5 === x, and not x === 1..5.
This allows for sophisticated when clauses as seen above. Ranges, classes and all sorts of things can be tested for rather than just equality.
Unlike switch statements in many other languages, Ruby’s case does not have fall-thr...
How to get the current working directory in Java?
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@ubuntudroid: that's why i mentioned specifically that it will print the path from where the application had initialized. My guess the thread starter directly run the jar/program after starting commnad prompt (which is basically at C:\WINDOWS\system32). I hope you under...