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Proper usage of Optional.ifPresent()
I am trying to understand the ifPresent() method of the Optional API in Java 8.
5 Answers
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adding noise to a signal in python
I want to add some random noise to some 100 bin signal that I am simulating in Python - to make it more realistic.
7 Answer...
When do you need to explicitly call a superclass constructor?
...Well there's a difference between requiring the constructor to be present, and requiring an explicit delegation to the parameterless super-constructor. The latter is a matter of style - whether you prefer to be explicit/obvious or brief.
– Jon Skeet
Dec 11 '17 ...
Using bitwise OR 0 to floor a number
...in some cases?
Clarity is an obvious one, since we had to figure it out, and well,
I'm writting this question.
Will not pass jsLint.
32-bit signed integers only
Odd Comparative behavior: Math.floor(NaN) === NaN, while (NaN | 0) === 0
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Example invalid utf8 string?
I'm testing how some of my code handles bad data, and I need a few series of bytes that are invalid UTF-8.
5 Answers
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Package objects
...write
import swing._
import Swing._
to have all the goodness like onEDT and implicit conversions from Tuple2 to Dimension.
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What is the recommended batch size for SqlBulkCopy?
...s my SQL Server instance. Using a custom IDataReader, it parses flat files and inserts them into a database using SQLBulkCopy. A typical file has about 6M qualified rows, averaging 5 columns of decimal and short text, about 30 bytes per row.
Given this scenario, I found a batch size of 5,000 to be...
Determine if Android app is being used for the first time
I am currently developing an android app. I need to do something when the app is launched for the first time, i.e. the code only runs on the first time the program is launched.
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WPF Button with Image
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This is a pretty bad solution as the text and image won't be grayed out when you disable the button.
– Num Lock
May 24 '17 at 9:22
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Dispelling the UIImage imageNamed: FUD
...Feb 2014: Note that this question dates from iOS 2.0! Image requirements and handling have moved on a lot since then. Retina makes images bigger and loading them slightly more complex. With the built in support for iPad and retina images, you should certainly use ImageNamed in your code .
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