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typeof !== “undefined” vs. != null
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typeof is safer as it allows the identifier to never have been declared before:
if(typeof neverDeclared === "undefined") // no errors
if(neverDeclared === null) // throws ReferenceError: neverDeclared is not defined
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Git rebase --continue complains even when all merge conflicts have been resolved
...l code in the patch beeing applied to the branch you are rebasing on. Use git rebase --skip to continue.
A bit more details:
Normally, when fixing a conflict during rebasing, you will edit the conflicting file, keeping some or all of the code in the patch currently being applied to the branch you...
Is it wrong to place the tag after the tag?
How wrong is it to place the script tag after the closing tag of the body ( </body> ). ?
8 Answers
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What are sessions? How do they work?
...hat they store some info in a key value pair on the browser. But I have a little confusion regarding sessions, in a session too we store data in a cookie on the user's browser.
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html onchange event not working
...nt to happen is that everytime the user types in something in the textbox, it will be displayed in a dialog box. I used the onchange event property to make it happen but it doesn't work. I still need to press the submit button to make it work. I read about AJAX and I am thinking to learn about thi...
twitter-bootstrap vs jquery-mobile [closed]
I'm wondering if someone can give some advice as to which is 'better'. Twitter-bootstrap or JQuery mobile?
5 Answers
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Best programming aids for a quadriplegic programmer
Before you jump to conclusions, yes, this is programming related. It covers a situation that comes under the heading of, "There, but for the grace of God, go you or I." This is brand new territory for me so I'm asking for some serious help here.
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...ce to sandbox untrusted programs both interactively and in automatic mode. It has a ptrace()-based backend which allows its use on a Linux system without special privileges, as well as a far faster and more poweful backend which requires patching the kernel.
It is also possible to create a sandbox ...
Why do variable names often start with the letter 'm'? [duplicate]
...Notepad tutorial , I noticed that almost all variables are named starting with the letter 'm'. What convention is this, and where does it originate from?
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Is it acceptable and safe to run pip install under sudo?
...'ve started to use my Mac to install Python packages in the same way I do with my Windows PC at work; however on my Mac I've come across frequent permission denied errors while writing to log files or site-packages.
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