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How to convert an iterator to a stream?
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One way is to create a Spliterator from the Iterator and use that as a basis for your stream:
Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();
Stream<String> targetStream = StreamSupport....
What is a “static” function in C?
...e variable". This is Smalltalk terminology. This means that there is only one copy of a static data member shared by all objects of a class, while each object has its own copy of a non-static data member. So a static data member is essentially a global variable, that is a member of a class.
Non-s...
Use tnsnames.ora in Oracle SQL Developer
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everyone, Just a little update on this old (but quite helpfull) post : don't try to use a symbolic link on Windows. SQL developper doesn't seem to know how to use it. Made me lose some time. Hope it'll save yours.
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GROUP BY with MAX(DATE) [duplicate]
...ated columns in your result set which are not grouped. If a train has only one destination, then just add the destination column to your group by clause, otherwise you need to rethink your query.
Try:
SELECT t.Train, t.Dest, r.MaxTime
FROM (
SELECT Train, MAX(Time) as MaxTime
FROM Trai...
How do I pause my shell script for a second before continuing?
...5m # Waits 5 minutes.
sleep 5h # Waits 5 hours.
sleep 5d # Waits 5 days.
One can also employ decimals when specifying a time unit; e.g. sleep 1.5s
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Bash tool to get nth line from a file
...o, universal syntax :). It is NOT less effective, because redirection are done with shell when forking itself, so... it is only a preference... (and yes, it is one character longer) :)
– jm666
May 27 '13 at 16:11
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Regular expression to match DNS hostname or IP Address?
Does anyone have a regular expression handy that will match any legal DNS hostname or IP address?
21 Answers
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Altering a column: null to not null
...bove two correct responses. The semantics of NULL can have a few meanings. One of the common meaning is UNKNOWN. Take SCORE as an example. A null SCORE and a ZERO SCORE is a world of difference! Before you did the above recommendations. Make sure you application does not take null in its business lo...
Convert Mercurial project to Git [duplicate]
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You can try using fast-export:
cd ~
git clone https://github.com/frej/fast-export.git
git init git_repo
cd git_repo
~/fast-export/hg-fast-export.sh -r /path/to/old/mercurial_repo
git checkout HEAD
Also have a look at this SO question.
If you're using Mercurial v...
Check if list contains element that contains a string and get that element
While searching for an answer to this question, I've run into similar ones utilizing LINQ but I haven't been able to fully understand them (and thus, implement them), as I'm not familiarized with it. What I would like to, basically, is this:
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