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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
... specify updates which should only 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:...
Swift equivalent for MIN and MAX macros
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min and max are already defined in Swift:
func max<T : Comparable>(x: T, y: T, rest: T...) -> T
func min<T : Comparable>(x: T, y: T, rest: T...) -> T
See this great writeup on documented & undocumented built-in functions in Swift.
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Why does JavaScript only work after opening developer tools in IE once?
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How do you push a Git tag to a branch using a refspec?
...erhaps you saw the following error message:
error: Trying to write non-commit object to branch refs/heads/master
Annotated tags have their own distinct type of object that points to the tagged commit object. Branches can not usefully point to tag objects, only commit objects. You need to “p...
What's the best three-way merge tool? [closed]
Subversion, Git, Mercurial and others support three-way merges (combining mine, theirs, and the "base" revision) and support graphical tools to resolve conflicts.
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Difference between float and double in php?
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Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...ion in documentation? there is nothing about a DOT here: developer.android.com/guide/topics/manifest/…
– Beto Caldas
May 19 '16 at 13:07
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Bulk package updates using Conda
...conda update) that I can list outdated packages and select or bulk update (compatible) packages in Anaconda?
4 Answers
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Struct constructor: “fields must be fully assigned before control is returned to the caller.”
...re setting the probability field through the Probability property, but the compiler doesn't know that the property sets the field... so you need to explicitly initialize the probability field itself
public AttackTraits(double probability, int damage, float distance)
{
this.probability = 0;
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How to give Jenkins more heap space when it´s started as a service under Windows?
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see also stackoverflow.com/questions/14762162/…
– user817795
Aug 28 '17 at 3:40
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