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What are “signed” cookies in connect/expressjs?
...a signature, so it can detect if the client modified the cookie.
It works by creating a HMAC of the value (current cookie), and base64 encoded it. When the cookie gets read, it recalculates the signature and makes sure that it matches the signature attached to it.
If it does not match, then it wil...
Why would someone use WHERE 1=1 AND in a SQL clause?
... dealing with trailing ANDs or COMMAs isn't dirty... nothing is cleaner by having 1=1 all over your SQL.
– Mark Brady
Oct 28 '08 at 22:01
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Difference between staticmethod and classmethod
...e a.foo only expects 1 argument.
a is bound to foo. That is what is meant by the term "bound" below:
print(a.foo)
# <bound method A.foo of <__main__.A object at 0xb7d52f0c>>
With a.class_foo, a is not bound to class_foo, rather the class A is bound to class_foo.
print(a.class_foo)
#...
Superiority of unnamed namespace over static?
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As noted by Fred Nurk on another of your answer, it seems that this deprecated remark was removed from the latest C++0x FCD (n3225).
– Matthieu M.
Jan 18 '11 at 16:30
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Is String.Format as efficient as StringBuilder
...titively, i.e. you're doing some serious text processing over 100's of megabytes of text, or whether it's being called when a user clicks a button now and again. Unless you're doing some huge batch processing job I'd stick with String.Format, it aids code readability. If you suspect a perf bottlenec...
How to serialize a JObject without the formatting?
... (I'm using Json.Net) that I constructed with LINQ to JSON (also provided by the same library). When I call the ToString() method on the JObject , it outputs the results as formatted JSON.
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Filter LogCat to get only the messages from My Application in Android?
...can use the Log function with the tag as your package name and then filter by package name:
NOTE: As of Build Tools 21.0.3 this will no longer work as TAGS are restricted to 23 characters or less.
Log.<log level>("<your package name>", "message");
adb -d logcat <your package name&g...
Getting the docstring from a function
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You can also use inspect.getdoc. It cleans up the __doc__ by normalizing tabs to spaces and left shifting the doc body to remove common leading spaces.
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How to format a number as percentage in R?
One of the things that used to perplex me as a newby to R was how to format a number as a percentage for printing.
10 Answe...
How do RVM and rbenv actually work?
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Short explanation: rbenv works by hooking into your environment's PATH. The concept is simple, but the devil is in the details; full scoop below.
First, rbenv creates shims for all the commands (ruby, irb, rake, gem and so on) across all your installed ve...