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What is a void pointer in C++? [duplicate]
...types, so the exact type that a particular call returns cannot be known at compile time. Therefore, there will be some documentation explaining when it stores which kinds of objects, and therefore which type you can safely cast it to.
This construct is nothing like dynamic or object in C#. Those t...
How to install multiple python packages at once using pip
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For installing multiple packages on the command line, just pass them as a space-delimited list, e.g.:
pip install wsgiref boto
For installing from a text file, then, from pip install --help:
-r FILENAME, --requirement=FILENAME
Install all the packages listed in t...
ConcurrentHashMap vs Synchronized HashMap
...rticle Java 7: HashMap vs ConcurrentHashMap is a very good read. Highly recommended.
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How to maintain aspect ratio using HTML IMG tag
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Rails: fields_for with index?
...as posted many years ago, for a modern approach see:
https://stackoverflow.com/a/22640703/105403
This would actually be a better approach, following Rails documentation more closely:
<% @questions.each.with_index do |question,index| %>
<% f.fields_for :questions, question do |fq| %>...
List of standard lengths for database fields
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W3C's recommendation:
If designing a form or database that will accept names from people
with a variety of backgrounds, you should ask yourself whether you
really need to have separate fields for given name and family name.
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Comprehensive beginner's virtualenv tutorial? [closed]
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This is very good: http://simononsoftware.com/virtualenv-tutorial-part-2/
And this is a slightly more practical one: https://web.archive.org/web/20160404222648/https://iamzed.com/2009/05/07/a-primer-on-virtualenv/
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What is the best way to tell if a character is a letter or number in Java without using regexes?
... gives true on way more than a-Z0-9 !!! refer to the doc here docs.oracle.com/javase/7/docs/api/java/lang/…
– fl0w
Mar 6 '19 at 16:49
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How to bind 'touchstart' and 'click' events but not respond to both?
...wed close to 100k times at this point. This seems like an extraordinarily common use case/problem. However, this answer and others on this and similar questions all seem hacky. The google solution, while more thoroughly thought through than most, seems like merely a more robust hack. For somethin...
With CSS, use “…” for overflowed block of multi-lines
...t handle multiple lines of text. Following works:
http://pvdspek.github.com/jquery.autoellipsis/
http://dotdotdot.frebsite.nl/
http://keith-wood.name/more.html
http://github.com/tbasse/jquery-truncate
There also some preformance tests.
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