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typeof !== “undefined” vs. != null
I often see JavaScript code which checks for undefined parameters etc. this way:
11 Answers
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linux tee is not working with python?
...ables buffering and additionally makes control sequences (C-a, cursor keys etc) work: stackoverflow.com/a/39269661/15690.
– blueyed
Sep 5 '16 at 13:45
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php execute a background process
...te the process as a server-side script in whatever language (php/bash/perl/etc) is handy and then call it from the process control functions in your php script.
The function probably detects if standard io is used as the output stream and if it is then that will set the return value..if not then it...
Visual Studio 2012 Web Publish doesn't copy files
...ing, changing configuration and changing back, restarting VS, rebuild all, etc. I created a new view in my app. It's there. I can see it. When I run locally it displays. When I publish, it's not there. I have update 4.
– Robert
Nov 5 '14 at 18:13
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Send a file via HTTP POST with C#
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(you can of course add headers / credentials / etc as normal)
– Marc Gravell♦
Jul 15 '09 at 13:49
1
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Given a view, how do I get its viewController?
...rectly a superview member variable (check parent type, remove from parent, etc). Having worked with PureMVC recently, I have become a little more nit-picky about design abstraction :) I would make parallel between iPhone's UIView and UIViewController classes and PureMVC's View and Mediator classes -...
How to write LaTeX in IPython Notebook?
...ipynb to TeX (code, figures and all), and run latex to render that to PDF, etc. You don't get live-rendered TeX in the browser like you do with MathJax / Markdown, but you do still have TeX / code in one document.
– minrk
Nov 8 '12 at 21:29
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Best way to store JSON in an HTML attribute?
...tain HTML specials that could start a tag, HTML comment, embedded doctype, etc. You need to escape at least <, and & in such a way that the original character does not appear in the escaped sequence.
In <script> elements you need to ensure that the JSON does not contain an end tag <...
How to center text vertically with a large font-awesome icon?
...e the change globally:
.fa-2x {
vertical-align: middle;
}
Add 3x, 4x, etc to the same definition as needed.
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Move entire line up and down in Vim
...ultiple lines in VIM
once selected hit : and run the commands above, m +1 etc
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