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Regex empty string or email
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This regex pattern will match an empty string:
^$
And this will match (crudely) an email or an empty string:
(^$|^.*@.*\..*$)
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Install go with brew, and running the gotour
... paste the export lines in .bash_profile, not in .bashrc, restart your mac and IntelliJ will find GOPATH (just tested, reboot needed)
– firepol
Jun 4 '15 at 4:53
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Const in JavaScript: when to use it and is it necessary?
...aScript. From what I can tell, it is used to create immutable variables , and I've tested to ensure that it cannot be redefined (in Node.js):
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Find all packages installed with easy_install/pip?
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pip freeze will output a list of installed packages and their versions. It also allows you to write those packages to a file that can later be used to set up a new environment.
https://pip.pypa.io/en/stable/reference/pip_freeze/#pip-freeze
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Send email using the GMail SMTP server from a PHP page
...lease give me a link where I can get the Mail.php file. Because I tried it and it would not work Thanks
– Yoosuf
Apr 17 '11 at 6:52
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How do I disable right click on my web page?
...at with JavaScript by adding an event listener for the "contextmenu" event and calling the preventDefault() method:
document.addEventListener('contextmenu', event => event.preventDefault());
That being said: DON'T DO IT.
Why? Because it achieves nothing other than annoying users. Also many br...
What does .SD stand for in data.table in R
...ks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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How to save a Python interactive session?
...a lot of manual formatting of semi-structured data. I don't properly save and clean up the useful bits as often as I would like. Is there a way to save my input into the shell (db connections, variable assignments, little for loops and bits of logic) -- some history of the interactive session? If...
How to tell Eclipse Workspace?
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For me it work to choose File->Switch Workspace->Other... and it shows the name of current workspace.
I tried to confirm
"Actually, this shows the last workspace that was closed, not the current workspace. If you are opening and closing several, this is not dependable."
a...
UITextView that expands to text using auto layout
...mmatically. I have a UITextView in the middle of the view with items above and below it. Everything works fine, but I want to be able to expand UITextView as text is added. This should push everything below it down as it expands.
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