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Extract a substring according to a pattern
...001" "E002" "E003"
4a) substring/regex
If the colon were not always in a known position we could modify (4) by searching for it:
substring(string, regexpr(":", string) + 1)
5) strapplyc
strapplyc returns the parenthesized portion:
library(gsubfn)
strapplyc(string, ":(.*)", simplify = TRUE)
## [1] ...
error_log per Virtual Host?
...h new versions of PHP as they add more error levels. E_ALL = "30719" right now.
– ReactiveRaven
Mar 8 '12 at 16:26
2
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Why doesn't Console.Writeline, Console.Write work in Visual Studio Express?
... Make my day! I can loop through my LINQ query and write to the console now which is quick cheap way of getting the correct data into the fray.
– JustJohn
Aug 30 '15 at 6:07
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How does a public key verify a signature?
... key to obtain a message, supposedly the same message as (1) but we don't know yet. We now have two messages that we need to verify are identical. So to do this, we will encrypt them both with our public key and compare the two hashes. So we will ....
Encrypt the original message (1) with the public...
How can I check the extension of a file?
...rmalise it to lowercase.
ext = os.path.splitext(fp)[-1].lower()
# Now we can simply use == to check for equality, no need for wildcards.
if ext == ".mp3":
print fp, "is an mp3!"
elif ext == ".flac":
print fp, "is a flac file!"
else:
print fp, "is an unkno...
Go to Matching Brace in Visual Studio?
...TRL + ]. It works with parentheses ( ), brackets [ ] and braces { }. From now on you don’t need to play Where’s Waldo? to find that brace.
On MacOS, use CMD + SHIFT + \
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Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...s even if the set is empty, so the function is never applied! As far as I know there is no other collection framework with an equivalent functionality. Yet from a user perspective this is how things are supposed to work.
The problem we have is that all the clever technology that makes this happen l...
Generate a random letter in Python
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@TaylorLeese, as I have known that there are three options including ascii_letters, ascii_uppercase, and ascii_lowercase.
– trdngy
May 18 '18 at 11:17
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Convert Unix timestamp to a date string
...-r the same as these other implementations. So unfortunately you have to know which version of date you're using, and many older Unix date commands don't support either option.
Even worse, POSIX date recognizes neither -d nor -r and provides no standard way in any command at all (that I know of) t...
Can't access RabbitMQ web management interface after fresh install
... test administrator
rabbitmqctl set_permissions -p / test ".*" ".*" ".*"
Now you can access using test test.
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