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Why is reading lines from stdin much slower in C++ than Python?
...io(false);
Normally, when an input stream is buffered, instead of reading one character at a time, the stream will be read in larger chunks. This reduces the number of system calls, which are typically relatively expensive. However, since the FILE* based stdio and iostreams often have separate im...
Rails: How to change the text on the submit button in a Rails Form
...tion (very easy navigation / search)
Sometimes, a google search like the one below helps:
Google: site:api.rubyonrails.org f.submit
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What does Html.HiddenFor do?
... a good reason the scaffolding mechanism adds the ID field. Remove it from one of my tutorials and use Fiddler to see it's not in the post body.
– RickAndMSFT
May 10 '13 at 23:33
2...
Get list of passed arguments in Windows batch script (.bat)
...re command line starting from n-th parameter.
– Van Jone
Mar 14 '13 at 11:45
6
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Standardize data columns in R
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Realizing that the question is old and one answer is accepted, I'll provide another answer for reference.
scale is limited by the fact that it scales all variables. The solution below allows to scale only specific variable names while preserving other variables u...
Why does changing the sum order returns a different result?
... In IEEE floating point representation, bits 2-12 represent the binary exponent, that is, the scale of the number. (The first bit is the sign bit, and the remaining bits for the mantissa.) The exponent represented is actually the binary number minus 1023.
The exponents for the first 4 numbers are...
Using an image caption in Markdown Jekyll
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I need more information… it's possible to put more than one image without the need to repeat the include image.html? I'm trying with something like {% for image in page.images %} but no success. Can you help me?
– edmundo
Aug 6 '15 at 1:29
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What do the result codes in SVN mean?
...because all files are automatically merged in to working copy, the correct one should be:
U = item (U)pdated to repository version
G = item’s local changes mer(G)ed with repository
C = item’s local changes (C)onflicted with repository
D = item (D)eleted from working copy
A = item (A)dd...
How to swap two variables in JavaScript
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Here's a one-liner to swap the values of two variables.
Given variables a and b:
b = [a, a = b][0];
Demonstration below:
var a=1,
b=2,
output=document.getElementById('output');
output.innerHTML="<p>Original:...
What does collation mean?
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Besides the "accented letters are sorted differently than unaccented ones" in some Western European languages, you must take into account the groups of letters, which sometimes are sorted differently, also.
Traditionally, in Spanish, "ch" was considered a letter in its own right, same with "l...