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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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Get current directory name (without full path) in a Bash script
...ionality is silly, incurring performance impact (fork(), execve(), wait(), etc) for no reason.
– Charles Duffy
Jun 29 '13 at 18:30
4
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jQuery callback on image load (even when the image is cached)
..., often it's necessary to set both width and height only if you need to stretch the image; for a more robust solution I would use a plugin like ImagesLoaded
– guari
Aug 11 '15 at 21:21
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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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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...
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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Is it OK to use == on enums in Java?
... break;
case HALF_EVEN:
//do something
break;
// etc
}
}
An even better way of doing it is to put the functionality within the enum itself, so you could just call roundingMode.round(someValue). This gets to the heart of Java enums - they're object-oriented enums, unlike...
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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Access-Control-Allow-Origin Multiple Origin Domains?
...hy they (mozilla/firefox) didn't do the same for other resources (js, css, etc) is beyond me.
– Tracker1
Aug 15 '13 at 16:28
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