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How to have jQuery restrict file types on upload?

...ad field to only jpg/jpeg, png, and gif. I am doing backend checking with PHP already. I am running my submit button through a JavaScript function already so I really just need to know how to check for the file types before submit or alert. ...
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How can I increment a char?

...and C. How can I increment a char? In Java or C, chars and ints are practically interchangeable, and in certain loops, it's very useful to me to be able to do increment chars, and index arrays by chars. ...
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String length in bytes in JavaScript

... This string I remember testing on php is 14 – May Weather VN Jul 18 at 10:19 add a comment  |  ...
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How to connect to SQL Server database from JavaScript in the browser?

...de showing how to connect to a SQL Server 2005 database from JavaScript locally? I am learning web programming on my desktop. ...
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Smooth GPS data

... displaying current position on a map. The problem is that sometimes (specially when accuracy is low) the values vary a lot, making the current position to "jump" between distant points in the map. ...
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JOIN queries vs multiple queries

...ase. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several. ...
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What does it mean when an HTTP request returns status code 0?

What does it mean when JavaScript network calls such as fetch or XMLHttpRequest, or any other type of HTTP network request, fail with an HTTP status code of 0? ...
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What is a “surrogate pair” in Java?

...encoding, characters are mapped to values between 0x0 and 0x10FFFF. Internally, Java uses the UTF-16 encoding scheme to store strings of Unicode text. In UTF-16, 16-bit (two-byte) code units are used. Since 16 bits can only contain the range of characters from 0x0 to 0xFFFF, some additional complex...
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Analytics Google API Error 403: “User does not have any Google Analytics Account”

... and added the Service User's email address. .p12 authorization using the PHP API works, but only if I check off "Read & Analyze" only in the permissions list. – Johnny O Sep 15 '15 at 22:18 ...
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Unable to find valid certification path to requested target - error even after cert imported

...'own' take on keychains and what not. So it may be looking at something totally different. Short of truss-ing - I'd try: java -Djavax.net.debug=all -Djavax.net.ssl.trustStore=trustStore ... to see if that helps. Instead of 'all' one can also set it to 'ssl', key manager and trust manager - whic...