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Extract substring in Bash
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@jonnyB, Some time in the past that worked. I am told by my coworkers it stopped, and they changed it to be a sed command or something. Looking at it in the history, I was running it in a sh script, which was probably dash. At this point I can't get it to work anymore.
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How do I sort unicode strings alphabetically in Python?
Python sorts by byte value by default, which means é comes after z and other equally funny things. What is the best way to sort alphabetically in Python?
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Immutable class?
... to make an object immutable?
In general, an immutable object can be made by defining a class which does not have any of its members exposed, and does not have any setters.
The following class will create an immutable object:
class ImmutableInt {
private final int value;
public ImmutableInt(...
Difference between del, remove and pop on lists
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Use del to remove an element by index, pop() to remove it by index if you need the returned value, and remove() to delete an element by value. The last requires searching the list, and raises ValueError if no such value occurs in the list.
When deleting...
How to reset sequence in postgres and fill id column with new data?
...s no need to specify the WITH 1 anymore. The start value that was recorded by CREATE SEQUENCE or last set by ALTER SEQUENCE START WITH will be used (most probably this will be 1).
Reset the sequence:
ALTER SEQUENCE seq RESTART;
Then update the table's ID column:
UPDATE foo SET id = DEFAULT;
S...
What is meant by Scala's path-dependent types?
... imageUploader: {
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How to find the key of the largest value hash?
...ding on the value of hash elements:
def largest_hash_key(hash)
hash.max_by{|k,v| v}
end
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Can't seem to discard changes in Git
...s.
core.safecrlf
If true, makes git check if converting CRLF as controlled by
core.autocrlf is reversible. Git will
verify if a command modifies a file in
the work tree either directly or
indirectly. For example, committing a
file followed by checking out the same
file should yield the original file...
Should I always use a parallel stream when possible?
...threads takes a significant amount of time. I would use sequential streams by default and only consider parallel ones if
I have a massive amount of items to process (or the processing of each item takes time and is parallelizable)
I have a performance problem in the first place
I don't already run...
PUT vs. POST in REST
...e of the target resource be
created or replaced with the state defined by the representation
enclosed in the request message payload.
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