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How to hash some string with sha256 in Java?
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SHA-256 isn't an "encoding" - it's a one-way hash.
You'd basically convert the string into bytes (e.g. using text.getBytes(StandardCharsets.UTF_8)) and then hash the bytes. Note that the result of the hash would also be arbitrary binary data, and if you want to...
Bundle ID Suffix? What is it?
I'm new to the iPhone submission process. Apple asks for the Bundle ID Suffix. What is this? Not sure what to put here and what the significance of it is.
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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...ng at the source code, the synchronized map is only an implementation with one mutex (blocking) while the ConcurrentHashMap is more complex to deal with concurrent access
– Vinze
Feb 4 '09 at 9:36
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How to Create Deterministic Guids
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As mentioned by @bacar, RFC 4122 §4.3 defines a way to create a name-based UUID. The advantage of doing this (over just using a MD5 hash) is that these are guaranteed not to collide with non-named-based UUIDs, and have a very (very)...
How to draw polygons on an HTML5 canvas?
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There are a few ways to get what you want. One option is to use the built in cxt.rotate() method [along with cxt.save() and cxt.restore()] to rotate parts of the canvas. Alternatively, adding a consistent value to the cos and sin functions will also work. See this jsf...
Child with max-height: 100% overflows parent
...r the child's max-height to be calculated from, so max-height computes to none, allowing the child to be as tall as possible. The only other constraint acting on the child now is the max-width of its parent, and since the image itself is taller than it is wide, it overflows the container's height do...
Is there any reason to use a synchronous XMLHttpRequest?
It seems most everyone does asynchronous requests with XMLHttpRequest but obviously the fact that there is the ability to do synchronous requests indicates there might be a valid reason to do so. So what might that valid reason be?
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ORA-00979 not a group by expression
... result would you expect - A or B? Or should the database return more than one row, violating the contract of GROUP BY?
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Suppress echo of command invocation in makefile?
... write the output to a file, which has a SHA1 fingerprint identical to the one given in the spec.
4 Answers
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#if DEBUG vs. Conditional(“DEBUG”)
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if anyone's wondering, IL = Intermediate Language - en.wikipedia.org/wiki/Common_Intermediate_Language
– jbyrd
Jun 2 '17 at 18:52
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