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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
...y happen when inserting documents.
This, combined with the upsert option, means you can use findAndModify to achieve an atomic findOrCreate-like operation.
db.collection.findAndModify({
query: { _id: "some potentially existing id" },
update: {
$setOnInsert: { foo: "bar" }
},
new: true,...
How to pass values between Fragments
... clicked the data is sent. When it is sent it replaces the fragment. Which means the list gets renewed every time. Therefore, not keeping the list of items in memory.
– wesley franks
Jun 29 '19 at 20:43
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The project type is not supported by this installation
... file with a notepad and check first line: what is Format Version there? I mean the project might be created with VS 2010.
– SergGr
May 3 '10 at 8:46
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XPath query to get nth instance of an element
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This is a FAQ:
//somexpression[$N]
means "Find every node selected by //somexpression that is the $Nth child of its parent".
What you want is:
(//input[@id="search_query"])[2]
Remember: The [] operator has higher precedence (priority) than the // abbrevia...
How to convert int[] to Integer[] in Java?
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That's meanwhile the correct way. If you need the Integer-Array as a list you could write: List<Integer> list = IntStream.of(q).boxed().collect(Collectors.toList());
– aw-think
Feb 27 '15...
NSURLRequest setting the HTTP header
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What does setValue:@"application/x-www-form-urlencoded" mean, is it sth custom?
– Dilara Albayrak
Mar 7 '16 at 13:28
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How to sort an ArrayList?
...t), using the reverse order comparator makes sure that the sort is stable (meaning that the order of elements will not be changed when they are equal according to the comparator, whereas reversing will change the order).
– Marco13
Aug 30 '14 at 23:18
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How to remove selected commit log entries from a Git repository while keeping their changes?
... commits (what was changed), or reword commit messages.
I think pick just means that you want to leave that commit alone.
(Example is from here)
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Fastest way to count exact number of rows in a very large table?
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@zerkmsby: For COUNT(key) I meant COUNT(primarykey) which should be non nullable. I'll clarify
– gbn
May 20 '11 at 8:30
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What does a script-Tag with src AND content mean?
...ingoftruth's question: html is editable by clients, so run it through eval means giving the user the ability to run arbitrary code, which is a massive security vulnerability.
– Federico S
Sep 21 at 20:05
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