Binary to text to binary
Gnu Privacy Guard includes a way to encode binary files as plain ASCII text files, and turn these text files back into binary. This is intended as a way to transmit encrypted data, but it can be used to convert any kind of file from binary to text and back
Read moreManaging PHP Versions with Laravel Herd
Laravel Herd allows developers to manage multiple PHP versions. This article will delve into how to use it, plus benefits and challenges. Continue reading Managing PHP Versions with Laravel Herd on SitePoint.
Read moreWhy “a caret, euro, trademark” ’ in a file?
Why might you see †in the middle of an otherwise intelligible file? The reason is very similar to the reason you might see �, which I explained in the previous post. You might want to read that post first if you’re not familiar with Unicode and character encodings. It
Read moreA valid character to represent an invalid character
You may have seen a web page with the symbol � scattered throughout the text, especially in older web pages. What is this symbol and why does it appear unexpected? The symbol we’re discussing is a bit of a paradox. It’s the (valid) Unicode character to represent an invalid Unicode
Read moreWhen zeros at natural numbers implies zero everywhere
Suppose a function f(z) equals 0 at z = 0, 1, 2, 3, …. Under what circumstances might you be able to conclude that f is zero everywhere? Clearly you need some hypothesis on f. For example, the function sin(πz) is zero at every integer but certainly not constantly zero.
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