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How do I calculate the normal vector of a line segment?
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243
if we define dx=x2-x1 and dy=y2-y1, then the normals are (-dy, dx) and (dy, -dx).
Note that no ...
Docker can't connect to docker daemon
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Olivier Dagenais
1,38422 gold badges1717 silver badges1919 bronze badges
answered Nov 8 '15 at 16:25
molavecmolavec
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How can I initialize an ArrayList with all zeroes in Java?
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432
The integer passed to the constructor represents its initial capacity, i.e., the number of elem...
Programmatically fire button click event?
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315
Sort of like Ken's answer, but more flexible as it'll keep track of the buttons actual actions...
What does “%.*s” mean in printf?
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123
You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than hard ...
How can one close HTML tags in Vim quickly?
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38
Check this out..
closetag.vim
Functions and mappings to close open HTML/XML tags
https://w...
How do I select the “last child” with a specific class name in CSS? [duplicate]
...lt;li class="list">test2</li>
<li class="list last">test3</li>
<li>test4</li>
</ul>
The last element has the list class like its siblings but also has the last class which you can use to set any CSS property you want, like so:
ul li.list {
color:...
Read file from line 2 or skip header row
...e it as a variable
– damned
Oct 8 '13 at 5:38
37
Or use header_line = next(f).
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Get month name from number
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Calendar API
From that you can see that calendar.month_name[3] would return March, and the array index of 0 is the empty string, so there's no need to worry about zero-indexing either.
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Finding most changed files in Git
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answered Feb 5 '16 at 13:11
AsenarAsenar
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