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Using Java 8's Optional with Stream::flatMap
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Java 9
Optional.stream has been added to JDK 9. This enables you to do the following, without the need of any helper method:
Optional<Other> result =
things.stream()
.map(this::resolve)
.flatMap(Optio...
Test for existence of nested JavaScript object key
...he value of nested properties, otherwise will return undefined.
UPDATE 2019-10-17:
The optional chaining proposal reached Stage 3 on the ECMAScript committee process, this will allow you to safely access deeply nested properties, by using the token ?., the new optional chaining operator:
const va...
When NOT to use Cassandra?
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edited Mar 27 '18 at 22:19
uribalb
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answered Jun 21 '15 at 11:...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
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329
At last I found the answer:
Just add this line before the line where you get error in your php f...
Changing Java Date one hour back
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249
java.util.Calendar
Calendar cal = Calendar.getInstance();
// remove next line if you're always ...
What is the difference between save and insert in Mongo DB?
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9 Answers
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Is there a naming convention for MySQL?
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answered Oct 26 '11 at 7:09
Tom MacTom Mac
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How do I recover/resynchronise after someone pushes a rebase or a reset to a published branch?
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Aristotle PagaltzisAristotle Pagaltzis
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How to display loading message when an iFrame is loading?
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GOBIN not set: cannot run go install
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edited Jul 5 '17 at 19:52
answered Aug 9 '14 at 8:44
V...