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Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
...detailed report on how 4chan defeated reCAPTCHA, and used it to manipulate Time.com's annual TIME 100 Poll results.
Hacking Recaptcha (aka ‘The Penis Flood’)
The next tactic used was to see if they could find a flaw in the reCAPTCHA implementation. One thing they discovered about reCAP...
Print multiple arguments in Python
...ting with numbers (useful for reordering or printing the same one multiple times):
print("Total score for {0} is {1}".format(name, score))
Use new-style string formatting with explicit names:
print("Total score for {n} is {s}".format(n=name, s=score))
Concatenate strings:
print("Total score for...
When is memoization automatic in GHC Haskell?
...t does, however, compute any given expression in the code at most once per time that its surrounding lambda-expression is entered, or at most once ever if it is at top level. Determining where the lambda-expressions are can be a little tricky when you use syntactic sugar like in your example, so le...
How can I time a code segment for testing performance with Pythons timeit?
...on script which works just as it should, but I need to write the execution time. I've googled that I should use timeit but I can't seem to get it to work.
...
What's a concise way to check that environment variables are set in a Unix shell script?
...e original shell comment notation (before '#' to end of line). For a long time, Bourne shell scripts had a colon as the first character. The C Shell would read a script and use the first character to determine whether it was for the C Shell (a '#' hash) or the Bourne shell (a ':' colon). Then the...
Could not open a connection to your authentication agent
...t is killed.)
Mac/OS X
If you don't want to start a new ssh-agent every time you open a terminal, check out Keychain. I'm on a Mac now, so I used the tutorial ssh-agent with zsh & keychain on Mac OS X to set it up, but I'm sure a Google search will have plenty of info for Windows.
Update: A ...
List of installed gems?
...w do |s|
# s.authors = ["David Heinemeier Hansson"]
# s.date = Time.utc(2013, 12, 3)
# s.dependencies = [Gem::Dependency.new("actionpack",
# Gem::Requirement.new(["= 4.0.2"]),
# :runtime),
# Gem::Dependency.new("mail",
# Gem::Requirement.new(["~> 2...
Using the RUN instruction in a Dockerfile with 'source' does not work
... by pulling the POSIX shell out from under the entire OS. (Unless you have time to verify all 2700 plus scripts that come with Linux plus all those in any packages you install.)
More detail in this answer below. https://stackoverflow.com/a/45087082/117471
...
Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
... almost certain that the developers of the language would better use their time providing more useful stuff (see below comments on opportunity cost).
That's also relevant for the original C++. Since the original implementation was effectively just a translator which produced C code, it carried over...
Efficiency of premature return in a function
...hm is a human job, but code-level optimisation is almost always a waste of time.
– Steve314
Oct 25 '11 at 9:46
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