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When is null or undefined used in JavaScript? [duplicate]
...t. So you can just do this: var undefined = "Magic!"; // Yes this works Now your code may or may not work. It is better to do a typeof(x) !== "undefined"
– ProVega
Apr 17 '14 at 21:29
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Why should I use Google's CDN for jQuery?
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Good to know, Aaron. Thanks.
– Lance Fisher
Feb 1 '10 at 23:33
3
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How can I put a database under git (version control)?
...m, and any changes will most likely change the whole database and thus you now have to send the full database over the wire to your git repo and store it. This is inefficient, slow, and makes it extremely hard to work with. Also, I am not sure that the database files stored on disk without VACUUM a...
Storing Objects in HTML5 localStorage
...ort for "num = parseFloat(localStorage.num);"
//Dates:
var date = Date.now();
localStorage.date = date;
date = new Date(parseInt(localStorage.date));
//Regular expressions:
var regex = /^No\.[\d]*$/i; //usage example: "No.42".match(regex);
localStorage.regex = regex;
var ...
Set a default parameter value for a JavaScript function
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I know it's really minor, but I don't like how you are assigning a = a and b = b when those parameters are not undefined. Also, that ternary operator with a bit complicated condition may be hard to read for future maintainers. I...
FileSystemWatcher vs polling to watch for file changes
... seen the file system watcher fail in production and test environments. I now consider it a convenience, but I do not consider it reliable. My pattern has been to watch for changes with the files system watcher, but poll occasionally to catch missing file changes.
Edit: If you have a UI, you ca...
Terminating a script in PowerShell
... it was a keyword and found no official documentation on it. Looking at it now however, I do not know how I came to that conclusion. Clearly it is a keyword (technet.microsoft.com/en-us/library/hh847744.aspx). Perhaps because Exit is one of the only keywords that doesn't have its own about_ help top...
LEFT JOIN only first row
... Wouldn't at this point a simple sub-query be better? Cause now you have a join, and a sub-query. Just asking cause I am looking for solution to same problem :)
– galdikas
Feb 11 '16 at 10:36
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JS: iterating over result of getElementsByClassName using Array.forEach
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@TimDown, Thanks for HTMLCollection tip. Now I finally can use HTMLCollection.prototype.forEach = Array.prototype.forEach; in my code.
– Maksim Vi.
Jan 21 '15 at 23:31
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Are typedef and #define the same in c?
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#define defines macros.
typedef defines types.
Now saying that, here are a few differences:
With #define you can define constants that can be used in compile time. The constants can be used with #ifdef to check how the code is compiled, and specialize certain code accord...