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Spark java.lang.OutOfMemoryError: Java heap space
...is larger than a few k or more than an MB, you may have a memory leak. See https://stackoverflow.com/a/25270600/1586965
Related to above; use broadcast variables if you really do need large objects.
If you are caching large RDDs and can sacrifice some access time consider serialising the RDD http://...
Where is the “Fold” LINQ Extension Method?
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How do I create an average from a Ruby array?
...
Try this:
arr = [5, 6, 7, 8]
arr.inject{ |sum, el| sum + el }.to_f / arr.size
=> 6.5
Note the .to_f, which you'll want for avoiding any problems from integer division. You can also do:
arr = [5, 6, 7, 8]
arr.inject(0.0) { |sum, el| sum + el } / arr.size
=> 6.5
You can define it...
Parse usable Street Address, City, State, Zip from a string [closed]
...the rest manually.
Do get a copy of Postal Addressing Standards (USPS) at http://pe.usps.gov/cpim/ftp/pubs/Pub28/pub28.pdf and notice it is 130+ pages long. Regexes to implement that would be nuts.
For international addresses, all bets are off. US-based workers would not be able to validate.
Alt...
Microbit 加速度传感器 · App Inventor 2 中文网
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Microbit 加速度传感器
Microbit_Accelerometer 组件允许用户配置 BBC micro:bit 的板载加速度计，并通过适当的方法接收一个或多个加速度计样本。
加速度计的报告速率（或周期）决定了数据发送到 App Inventor...
How does an underscore in front of a variable in a cocoa objective-c class work?
I've seen in a few iPhone examples that attributes have used an underscore _ in front of the variable. Does anyone know what this means? Or how it works?
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Get the (last part of) current directory name in C#
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How to detect if multiple keys are pressed at once using JavaScript?
...eyup event to keep track of when the keys are released.
See this example: http://jsfiddle.net/vor0nwe/mkHsU/
(Update: I’m reproducing the code here, in case jsfiddle.net bails:)
The HTML:
<ul id="log">
<li>List of keys:</li>
</ul>
...and the Javascript (using jQuer...
Modify UIImage renderingMode from a storyboard/xib file
...ix .xib issues with an extension:
import UIKit
// fixing Bug in XCode
// http://openradar.appspot.com/18448072
extension UIImageView {
override open func awakeFromNib() {
super.awakeFromNib()
self.tintColorDidChange()
}
}
Source: https://gist.github.com/buechner/3b97000a6...
Class constants in python
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