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Why can't decimal numbers be represented exactly in binary?
...le, the decimal number 0.1 doesn't have an exact binary representation, so it's dangerous to use the == operator to compare it to another floating-point number. I understand the principles behind floating-point representation.
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Is there a better way to do optional function parameters in JavaScript? [duplicate]
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edited Mar 9 '15 at 8:56
answered Sep 29 '08 at 14:30
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How do I associate a Vagrant project directory with an existing VirtualBox VM?
Somehow my Vagrant project has disassociated itself from its VirtualBox VM, so that when I vagrant up Vagrant will import the base-box and create a new virtual machine.
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Unnecessary curly braces in C++?
... a colleague today I saw a peculiar thing. He had surrounded his new code with curly braces like this:
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Using boolean values in C
...#define false 0
Explanation
Option 1 will work only if you use C99 and it's the "standard way" to do it. Choose this if possible.
Options 2, 3 and 4 will have in practice the same identical behavior. #2 and #3 don't use #defines though, which in my opinion is better.
If you are undecided, go w...
How can I comment a single line in XML?
... have the comment end automatically on a linebreak.
XML has only one definition for a comment:
'<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
XML forbids -- in comments to maintain compatibility with SGML.
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Polymorphism in C++
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To understand polymorphism - as the term is used in Computing Science - it helps to start from a simple test for and definition of it. Consider:
Type1 x;
Type2 y;
f(x);
f(y);
Here, f() is to perform some operation and is being given values x and y as inputs.
To exhibit po...
Are HTTPS URLs encrypted?
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edited Nov 28 '16 at 2:53
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answered Jan 31 '09 at 2...
Quickly reading very large tables as dataframes
...s a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead of time, the table does not contain any column headers or row names, an...
To prevent a memory leak, the JDBC Driver has been forcibly unregistered
I am getting this message when I run my web application. It runs fine but I get this message during shutdown.
14 Answers
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