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Why is a combiner needed for reduce method that converts type in java 8
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The two and three argument versions of reduce which you tried to use don't accept the same type for the accumulator.
The two argument reduce is defined as :
T reduce(T identity,
BinaryOperator<T> accumulator)
In your case, T is String, so BinaryOperator<T> should accep...
Syntax behind sorted(key=lambda: …)
I don't quite understand the syntax behind the sorted() argument:
9 Answers
9
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How to get the last N records in mongodb?
I can't find anywhere it has been documented this. By default, the find() operation will get the records from beginning. How can I get the last N records in mongodb?
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Change branch base
... opposite? == I checkout -b from master the second branch, but I wanted to do it from the first one. So I did git rebase --onto first-branch second-branch second-branch but I don't get the syntax
– Fla
Aug 2 '17 at 12:54
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
... discardSelector: ".discard-answer"
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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
... fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm as root):
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/...
How to automatically install Emacs packages by specifying a list of package names?
...n package could automatically search and install the packages, so that I don't need to install them manually by calling M-x package-list-packages . How to do that?
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Copy files without overwrite
...directory A to directory B, but if the file already exists in directory B, don't overwrite it, no matter which file is newer, and don't prompt me."
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Read only file system on Android
...ms to be working perfectly. I made some changes to build.prop and when I do adb push build.prop /system/ I get the following error: failed to copy 'c:\build.prop' to '/system//build.prop': Read-only file system .
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How do I hide the status bar in a Swift iOS app?
...u want to perform a segue, your parent view of current viewcontroller fall down about 20 px
– iman kazemayni
Nov 25 '18 at 13:20
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