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When to use next() and return next() in Node.js
Scenario : Consider the following is the part of code from a node web app.
5 Answers
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...25:43 share1 heartbeat: [4460]: info: standby: acquire [foreign] resources from share2
Nov 30 18:25:43 share1 heartbeat: [4493]: info: acquire local HA resources (standby).
ResourceManager(default)[4506]: 2015/11/30_18:25:43 info: Acquiring resource group: share1 IPaddr::10.10.10.40/24/eth1 drbd...
AI2 Keep Awake
...Motivation For some projects it is necessary to prevent the associated app from being deactivated by the operating system. A typical example would be that sensor data should be sent regularly to an MQTT broker. With version 6.0 ( Marshmallow), Android introduced Doze mode to optimize battery life...
val-mutable versus var-immutable in Scala
...use you need to store the resulting collection somewhere. If you only read from immutable collections, then use vals.
In general, make sure that you don't confuse references and objects. vals are immutable references (constant pointers in C). That is, when you use val x = new MutableFoo(), you'll b...
what exactly is device pixel ratio?
... understanding is its quality is lower because it got physically stretched from 300 to 600px. Can you elaborate on this a bit more, please?
– Peter
Mar 19 '16 at 6:48
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In which order should floats be added to get the most precise result?
...ll to individually affect the sum, or if you throw away too much precision from a lot of small values that individually only affect the last few bits of the sum. In cases where the tail is negligible anyway you probably don't care. For example if you're only adding together a small number of values ...
What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
... @rusio Here is my example. It supports monolithic build (all modules from the root folder) or autonomous builds (each module separately, requires install).
– Dimitrios Menounos
Apr 28 '15 at 0:14
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Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready
...;/script>
</body>
</html>
For modern browsers (anything from IE9 and newer and any version of Chrome, Firefox or Safari), if you want to be able to implement a jQuery like $(document).ready() method that you can call from anywhere (without worrying about where the calling script i...
What is the difference between class and instance attributes?
...ances. The attribute on an instance is unique to that instance.
If coming from C++, attributes on the class are more like static member variables.
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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
... in the hash if required.
So we must store the default value in the hash from within the block if we wish to use << instead of <<=:
h = Hash.new { |h, k| h[k] = [] }
h[0] << 'a' #=> ["a"]
h[1] << 'b' #=> ["b"]
h #=> {0=>["a"], 1=>["b"]}
This e...