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How to detect the end of loading of UITableView
...
Swift 3 & 4 & 5 version:
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if let lastVisibleIndexPath = tableView.indexPathsForVisibleRows?.last {
if indexPath == lastVisibleIndexPath {
...
How to make Eclipse behave well in the Windows 7 taskbar?
...ecify the latest available Java VM in your eclipse.ini. I.e.:
-vm
jdk1.6.0_10\jre\bin\client\jvm.dll
Make sure they are on separate lines
Anything after the "vmargs" is taken to be vm arguments
(More info)
Or alternatively add the java bin folder to your Windows PATH before the "windows32" fo...
Run a Docker image as a container
...must docker commit. You can use the NAME in the commit (e.g. docker commit _NAME_ _imagename_)
– Andy
Aug 24 '15 at 18:56
9
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Merge Images Side by Side(Horizontally)
... simple with ImageMagick (brew install imagemagick )
convert +append image_1.png image_2.png new_image_conbined.png
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How do I export UIImage array as a movie?
...catorDefault, frameSize.width,
frameSize.height, kCVPixelFormatType_32ARGB, (CFDictionaryRef) options,
&pxbuffer);
NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);
CVPixelBufferLockBaseAddress(pxbuffer, 0);
void *pxdata = CVPixelBufferGetBa...
dplyr: “Error in n(): function should not be called directly”
...ction" specification, like example below:
delay <- dplyr::summarise(by_tailnum,
count = n(),
dist = mean(distance, na.rm = TRUE),
delay = mean(arr_delay, na.rm = TRUE))
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Determine if Python is running inside virtualenv
...t reliable way to check for this is to check whether sys.prefix == sys.base_prefix. If they are equal, you are not in a virtual environment; if they are unequal, you are. Inside a virtual environment, sys.prefix points to the virtual environment, and sys.base_prefix is the prefix of the system Pytho...
Deleting rows with MySQL LEFT JOIN
...g "table as", then specify it to delete.
In the example i delete all table_1 rows which are do not exists in table_2.
DELETE t1 FROM `table_1` t1 LEFT JOIN `table_2` t2 ON t1.`id` = t2.`id` WHERE t2.`id` IS NULL
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屏幕控制使用指导 · App Inventor 2 中文网
...时页：开始计时时常亮，暂停或结束时恢复：
when 按钮_开始.Click() {
屏幕控制1.KeepScreenOn = true
计时器1.TimerEnabled = true
}
when 按钮_暂停.Click() {
屏幕控制1.KeepScreenOn = false
计时器1.TimerEnabled = false
}
要点：
常亮只在 App ...
Custom thread pool in Java 8 parallel stream
...gt;
// Parallel task here, for example
IntStream.range(1, 1_000_000).parallel()
.filter(PrimesPrint::isPrime)
.boxed().collect(Collectors.toList())
).get();
System.out.println(primes);
} catch (InterruptedException | ExecutionException e) {
...