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Using openssl to get the certificate from a server
...-liner to extract the certificate from a remote server in PEM format, this time using sed:
openssl s_client -connect www.google.com:443 2>/dev/null </dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'
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Check if an element is present in an array [duplicate]
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@PrithiviRaj It would be linear time, so performance impact would be directly proportional to the size of the array.
– Alister
Jan 23 '18 at 19:58
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Batch Renaming of Files in a Directory
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Wasted way too much time today trying to figure out why my "rename" command wasn't working - should've came here first! Great Pythonic one-liner!
– Devin
Jan 6 '15 at 18:41
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Substitute multiple whitespace with single whitespace in Python [duplicate]
...r knew split with no arguments worked like this. This is also much faster, timeit.py gives me around 0.74usec for this, versus 5.75usec for regular expressions.
– Roman
Jan 16 '10 at 16:00
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Please explain the exec() function and its family
... with a file block or an entire file.
Process resource utilisation and CPU time consumed is set to zero for the child.
The child also doesn’t inherit timers from the parent.
But what about the child memory? Is a new address space created for a child?
The answers in no. After the fork(), both pa...
How to check if a String contains any of some strings
...xes are overkill for this? If the regex is compiled once and used multiple times, and you have strings with only c in them or c near the beginning and a, b near the end, the regex would be far more efficient.
– bruceboughton
Aug 19 '10 at 8:55
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String, StringBuffer, and StringBuilder
Please tell me a real time situation to compare String , StringBuffer , and StringBuilder ?
11 Answers
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How to convert all text to lowercase in Vim
...is way because I am using this construct (:%s/[pattern]/replace/g) all the time so it's more natural.
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How to get “wc -l” to print just the number of lines without file name?
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I don't like cat - concatenation consumes to much time.
– PoGibas
Apr 19 '12 at 23:43
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What are the differences between Rust's `String` and `str`?
...string data (like passing strings to other threads, or building them at runtime), and use &str if you only need a view of a string.
This is identical to the relationship between a vector Vec<T> and a slice &[T], and is similar to the relationship between by-value T and by-reference &am...