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What characters are allowed in an email address?
...inal specification of hostnames in RFC 952, mandated that labels could not start with a digit or with a hyphen, and must not end with a hyphen. However, a subsequent specification (RFC 1123) permitted hostname labels to start with digits. No other symbols, punctuation characters, or blank spaces are...
Please explain the exec() function and its family
...() exemplifies the spirit of UNIX in that it provides a very simple way to start new processes.
The fork() call makes a near duplicate of the current process, identical in almost every way (not everything is copied over, for example, resource limits in some implementations, but the idea is to create...
Delete text in between HTML tags in vim?
...
(cursor on first character to delete)
v/<[enter]d
This solution starts on the first character, then enters visual mode ("v"). It then searches for the next start bracket ("/<"), and then press enter to exit the search.
At this point, your visual selection will cover the text to delet...
What's the difference between “git reset” and “git checkout”?
...e.g., git log --pretty=format:"%d" -1.
Attached head states will start with (HEAD ->,
detached will still show (HEAD, but will not have an arrow to a branch ref.
share
|
improve ...
How to extract img src, title and alt from html using php? [duplicate]
...this page. If you have no cache system, you can tweak your own by using ob_start and loading / saving from a text file.
How does this stuff work ?
First, we use preg_ match_ all, a function that gets every string matching the pattern and ouput it in it's third parameter.
The regexps :
<img[^&...
Navigation in django
...'ve just done my first little webapp in django and I love it. I'm about to start on converting an old production PHP site into django and as part its template, there is a navigation bar.
...
Chained method calls indentation style in Python [duplicate]
... this style becomes more obvious as method names get longer and as methods start taking arguments:
return some_collection.get_objects(locator=l5) \
.get_distinct(case_insensitive=True) \
.filter(predicate=query(q5)) \
.values()
PEP...
find -exec cmd {} + vs | xargs
...irst version is
safe, the second is not.
Your script will not treat a file starting with "-" as an option.
So your code should look like this:
find . -exec cmd -option1 -option2 -- {} +
or
find . -print0 | xargs -0 cmd -option1 -option2 --
The first version is shorter and easier to write as ...
JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
...tly Google has changed the guidelines, nothing to find about camel case or starting with letter, _ or $ in the document anymore ...
– TheEye
Jan 22 '14 at 14:02
34
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Reverse Y-Axis in PyPlot
...r plot graph with a bunch of random x, y coordinates. Currently the Y-Axis starts at 0 and goes up to the max value. I would like the Y-Axis to start at the max value and go up to 0.
...