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JavaScript is a versatile, high-level programming language. It is the programming language in all browsers.and can be used for back-end programming with node.js. Use this tag for questions regarding vanilla JavaScript; optionally tagged with an ECMAScript version. If you are using a preprocessor such as TypeScript please tag with that too.

5 votes

Function to check if a numbers sequence is increasing

It has already been mentioned, but if you mean a "non decreasing" sequence as opposed to a strictly increasing sequence, you could use the following. function isNonDecreasingSequence(numbers) { …
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3 votes

Concatenating CSV filenames into a single file

There is a security vulnerability. An attacker could set scripts to ../../index.php And the script will send the raw PHP to the browser. From there it would be easy to find your config file with …
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  • 336
1 vote

JS form verification

You can wrap all your code in a self-executing anonymous function, which will stop you from having any problems with variables leaking out of scope. I would also recommend splitting out the various c …
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  • 336