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How to set up Spark on Windows?
... http://spark.apache.org/docs/latest/building-spark.html
Download and install Maven, and set MAVEN_OPTS to the value specified in the guide.
But if you're just playing around with Spark, and don't actually need it to run on Windows for any other reason that your own machine is running Windows, I'd...
How to get RGB values from UIColor?
...rView.backgroundColor;//line 2
CGColorRef colorRef = [color CGColor];
int _countComponents = CGColorGetNumberOfComponents(colorRef);
if (_countComponents == 4) {
const CGFloat *_components = CGColorGetComponents(colorRef);
CGFloat red = _components[0];
CGFloat green = _components[1...
Returning value that was passed into a method
...
@TheSenator Agree, I don't reacall already what this was about but I guess I was just hacking some unit tests together for already existing code I was not to modify, otherwise this number of arguments definitely calls for refactoring.
...
DDD - the rule that Entities can't access Repositories directly
...s the database and query it (example : querying for multiple column unique index check ).With respect to this and the fact that queries should be written in the repository layer It comes out that domain entities need to have references to their repository interfaces in the domain model layer in orde...
Min/Max-value validators in asp.net mvc
...MaxValueAttribute : ValidationAttribute
{
private readonly int _maxValue;
public MaxValueAttribute(int maxValue)
{
_maxValue = maxValue;
}
public override bool IsValid(object value)
{
return (int) value <= _maxValue;
...
Send and receive messages through NSNotificationCenter in Objective-C?
...
@implementation TestClass
- (void) dealloc
{
// If you don't remove yourself as an observer, the Notification Center
// will continue to try and send notification objects to the deallocated
// object.
[[NSNotificationCenter defaultCenter] removeO...
Zip lists in Python
...x. list, string, tuple, dictionary)
Output (list)
1st tuple = (element_1 of numbers, element_1 of letters)
2nd tuple = (e_2 numbers, e_2 letters)
…
n-th tuple = (e_n numbers, e_n letters)
List of n tuples: n is the length of the shortest argument (input)
len(numbers) =...
Sending files using POST with HttpURLConnection
...one can provide me with a good example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything complicated, but I just want to have a reliable and logic implementation. All the examples that I've see...
micro:bit 实验03 - 做一块实时温度看板 · App Inventor 2 中文网
...
命名
关键属性
标签
标签_温度
字号 48、粗体、居中，文本「–」
标签
标签_单位
文本「℃」
滑动条
滑动条_周期
最小值 1、最大值 10、初始 1（单位...
MLKitDocScanner 拓展：文档扫描（自动找边缘、纠正透视、导出 PDF） · Ap...
... MLKitDocScanner、一个按钮、一个「图像」组件。
when 按钮_扫描.Click() {
DocScan1.Scan()
}
when DocScan1.GotScanResult(pageCount, imagePaths, pdfPath) {
标签1.Text = join("扫描完成，共 ", pageCount, " 页")
if length(imagePaths) > 0 {
图像1.Picture = imagePaths...