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Ruby: Change negative number to positive number?
What's the simplest way of changing a negative number to positive with ruby?
3 Answers
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Explain “claims-based authentication” to a 5-year-old
...enance of user authorizations and user sign-in out of a (web) application, by turning authentication/authorization into a separate (web) service.
So for example, when I browse to a claims-enabled web application for the first time, it will redirect my browser to a 'logon service' which it trusts. ...
Delete topic in Kafka 0.8.1.1
...ble=true can be located in the server.properties file. It is commented out by default.
– Shanemeister
Mar 10 '17 at 1:34
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Do subclasses inherit private fields?
...2):
Members of a class that are declared
private are not inherited by
subclasses of that class. Only members
of a class that are declared protected
or public are inherited by subclasses
declared in a package other than the
one in which the class is declared.
This addresses the ex...
Should I URL-encode POST data?
...general answer to your question is that it depends. And you get to decide by specifying what your "Content-Type" is in the HTTP headers.
A value of "application/x-www-form-urlencoded" means that your POST body will need to be URL encoded just like a GET parameter string. A value of "multipart/form...
List directory in Go
...the io/ioutil package. Per the docs:
ReadDir reads the directory named by dirname and returns a list of sorted directory entries.
The resulting slice contains os.FileInfo types, which provide the methods listed here. Here is a basic example that lists the name of everything in the current dire...
What is the explicit promise construction antipattern and how do I avoid it?
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The deferred antipattern (now explicit-construction anti-pattern) coined by Esailija is a common anti-pattern people who are new to promises make, I've made it myself when I first used promises. The problem with the above code is that is fails to utilize the fact that promises chain.
Promises can...
Does bit-shift depend on endianness?
...n the new value is stored back in memory, which is where the little endian byte order comes into effect again.
Update, thanks to @jww: On PowerPC the vector shifts and rotates are endian sensitive. You can have a value in a vector register and a shift will produce different results on little-endia...
Python “extend” for a dictionary
...c":5} to dict {"a":2, "b":3,"c":5}? Of course it's possible using update() by moving some stuff around, but it would be nicer if it could be accomplished in only one line...
– Nearoo
Jan 6 '16 at 16:28
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How do PHP sessions work? (not “how are they used?”)
...to the user when his session is created.
it is stored in a cookie (called, by default, PHPSESSID)
that cookie is sent by the browser to the server with each request
the server (PHP) uses that cookie, containing the session_id, to know which file corresponds to that user.
The data in the sessions f...