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How to validate an email address using a regular expression?
...ut a hitch. Python and C# can do that too, but they use a different syntax from those first two. However, if you are forced to use one of the many less powerful pattern-matching languages, then it’s best to use a real parser.
It's also important to understand that validating it per the RFC tells ...
Writing your own STL Container
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Here's a sequence pseudo-container I pieced together from § 23.2.1\4 Note that the iterator_category should be one of std::input_iterator_tag, std::output_iterator_tag,std::forward_iterator_tag,std::bidirectional_iterator_tag,std::random_access_iterator_tag. Also note that t...
Understanding typedefs for function pointers in C
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Consider the signal() function from the C standard:
extern void (*signal(int, void(*)(int)))(int);
Perfectly obscurely obvious - it's a function that takes two arguments, an integer and a pointer to a function that takes an integer as an argument and retu...
What is the difference between Reader and InputStream?
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An InputStream is the raw method of getting information from a resource. It grabs the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this is the stream to use.
A Reader is designed for character streams. If the ...
Clearing using jQuery
...you must call .preventDefault() on the event to prevent the <button> from triggering a submit.
EDIT
Does not work in IE 11 due to an unfixed bug. The text (file name) is cleared on the input, but its File list remains populated.
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JSON.parse vs. eval()
... are using eval() to interpret "user input" - which is ANY source external from your JavaScript (including returned values from servlets or other web services you've called). You cannot guarantee users have not entered malicious JavaScript either directly into your client app, or indirectly because ...
Loop through an array of strings in Bash?
...VS variables or files in to a list. Changing the internal field separator from a space, to what ever you want. In the example below it is changed to a comma
List="Item 1,Item 2,Item 3"
Backup_of_internal_field_separator=$IFS
IFS=,
for item in $List;
do
echo $item
done
IFS=$Backup_of_int...
How to go up a level in the src path of a URL in HTML?
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In Chrome when you load a website from some HTTP server both absolute paths (e.g. /images/sth.png) and relative paths to some upper level directory (e.g. ../images/sth.png) work.
But!
When you load (in Chrome!) a HTML document from local filesystem you cann...
Print list without brackets in a single row
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@FredrickGauss if you add from __future__ import print_function it'll work in python 2 as well.
– Anthony Sottile
Aug 26 '17 at 22:07
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How to compare software version number using js? (only number)
...to make this comparison would be to use Array.split to get arrays of parts from the input strings and then compare pairs of parts from the two arrays; if the parts are not equal we know which version is smaller.
There are a few of important details to keep in mind:
How should the parts in each pa...