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Why can't decimal numbers be represented exactly in binary?
...al numbers can be represented exactly, if you have enough space - just not by floating binary point numbers. If you use a floating decimal point type (e.g. System.Decimal in .NET) then plenty of values which can't be represented exactly in binary floating point can be exactly represented.
Let's look...
Equals(=) vs. LIKE
...compares whole strings.
LIKE is a string operator that compares character by character.
To complicate matters, both operators use a collation which can have important effects on the result of the comparison.
Motivating Example
Let's first identify an example where these operators produce obvious...
Beautiful Soup and extracting a div and its contents by ID
... just can't find divs inside divs, so i need to narrow things down wrapper by wrapper.
– Tony Stark
Jan 25 '10 at 22:59
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postgresql COUNT(DISTINCT …) very slow
...w.postgresql.org which discusses the same thing: link. One of the replies (by Jeff Janes) says that COUNT(DISTINCT()) sorts the table to do its work instead of using hash.
– Ankur
Dec 9 '14 at 10:58
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C/C++ include header file order
...nsen Yes, I was referring to overruling standard behavior. It could happen by accident just as, for example, breaking the ODR can happen by accident. The solution is not to use practices that hide when such accidents happen, but to use practices that are most likely to make them blow up as loudly as...
What happens when a computer program runs?
...ms. The "hole" is the size of your total memory, minus the space taken up by all the other areas; this gives a large amount of space for the heap to grow into. This is also "virtual", meaning it maps to your actual memory through a translation table, and may be actually stored at any location in a...
Why not be dependently typed?
...me point (either immediately, or after being compiled to dependently-typed bytecode or similar).
This is not necessarily a fundamental restriction, but I'm not personally aware of any current research that looks promising in this regard but that has not already made it into GHC. If anyone else kno...
JPQL IN clause: Java-Arrays (or Lists, Sets…)?
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The oracle limit is 1000 parameters. The issue has been resolved by hibernate in version 4.1.7 although by splitting the passed parameter list in sets of 500
see JIRA HHH-1123
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imp...
Changing Vim indentation behavior by file type
...t html/rb indent for 2 spaces, and js/coffee files indent for 4 spaces:
" by default, the indent is 2 spaces.
set shiftwidth=2
set softtabstop=2
set tabstop=2
" for html/rb files, 2 spaces
autocmd Filetype html setlocal ts=2 sw=2 expandtab
autocmd Filetype ruby setlocal ts=2 sw=2 expandtab
" for...
Why does modern Perl avoid UTF-8 by default?
I wonder why most modern solutions built using Perl don't enable UTF-8 by default.
7 Answers
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