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Why is there a `null` value in JavaScript?
... really "why is there a null value in JS" - there is a null value of some sort in most languages and it is generally considered very useful.
The question is, "why is there an undefined value in JS". Major places where it is used:
when you declare var x; but don't assign to it, x holds undefined;
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Extract only right most n letters from a string
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This aproach does not work correctly if the string is not as long as the number of characters required.
– stevehipwell
Nov 12 '09 at 13:59
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Get array of object's keys
... like to get the keys of a JavaScript object as an array, either in jQuery or pure JavaScript.
7 Answers
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Format numbers to strings in Python
I need to find out how to format numbers as strings. My code is here:
8 Answers
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How do you open an SDF file (SQL Server Compact Edition)? [closed]
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Try the sql server management studio (version 2008 or earlier) from Microsoft. Download it from here. Not sure about the license, but it seems to be free if you download the EXPRESS EDITION.
You might also be able to use later editions of SSMS. For 2016, you will need to ins...
HTML5 Local Storage fallback solutions [closed]
I'm looking for javascript libraries and code that can simulate localStorage on browsers that do not have native support.
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Can't pickle when using multiprocessing Pool.map()
I'm trying to use multiprocessing 's Pool.map() function to divide out work simultaneously. When I use the following code, it works fine:
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Is there an S3 policy for limiting access to only see/access one bucket?
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I've been trying this for a while and finally came up with a working solution. You must use different "Resources" depending on the kind of action you're performing. Also I included some missing actions in the previous answer (like DeleteObject) and...
What is a “cache-friendly” code?
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Preliminaries
On modern computers, only the lowest level memory structures (the registers) can move data around in single clock cycles. However, registers are very expensive and most computer cores have less than a few dozen registers. At the other end of the memory spectrum (DRAM), ...
Responsive css background images
I have a website (g-floors.eu) and I want to make the background (in css I have defined a bg-image for the content) also responsive. Unfortunately I really don't have any idea on how to do this except for one thing that I can think of but it's quite a workaround. Creating multiple images and then us...