大约有 10,000 项符合查询结果（耗时：0.0225秒） [XML]
Getting time elapsed in Objective-C
... resolved an issue of mine. When calling [NSDate date] within a completion block within a dispatch block, I was getting the same "current" time that was being reported by [NSDate date] immediately before execution hit the point at which my blocks were created. CACurrentMediaTime() solved this issue....
Multi-Line Comments in Ruby?
...note that in the above example code, only the first =begin...=end and last block using # are picked up by rdoc when generating documentation.
– the Tin Man
Aug 5 '14 at 19:50
...
Catching java.lang.OutOfMemoryError?
...till possible to do so).
In general, the OutOfMemoryError occurs due to a block memory allocation that cannot be satisfied with the remaining resources of the heap.
When the Error is thrown the heap contains the same amount of allocated objects as before the unsuccessful allocation and now is the ...
In an array of objects, fastest way to find the index of an object whose attributes match a search
...monstrating the fastest method. HERE is the link to the actual test
Setup block
var items = []
for(var i = 0; i < 1000; i++) {
items.push({id: i + 1})
}
var find = 523
Fastest Method
var index = -1
for(var i = 0; i < items.length; i++) {
if(items[i].id === find) {
index ...
How can I use Timer (formerly NSTimer) in Swift?
...work:
override func viewDidLoad() {
super.viewDidLoad()
// Swift block syntax (iOS 10+)
let timer = Timer(timeInterval: 0.4, repeats: true) { _ in print("Done!") }
// Swift >=3 selector syntax
let timer = Timer.scheduledTimer(timeInterval: 0.4, target: self, selector: #selec...
How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...his is an old question but if you are building iOS SDK 4+ then you can use blocks to do this with very little effort and make it more readable:
double delayInSeconds = 2.0;
int primitiveValue = 500;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC))...
Service vs IntentService in the Android platform
...s on a separate worker thread.
Limitations / Drawbacks
The Service may block the Main Thread of the application.
The IntentService cannot run tasks in parallel. Hence all the consecutive intents will go into the message queue for the worker thread and will execute sequentially.
When to stop?
...
Pandoc markdown page break
...o:
lorem ipsum
\newpage
more text
The \newpage will be parsed as a RawBlock containing raw TeX. The block will only be included in the output if the target format can contain raw TeX (i.e., LaTeX, Markdown, Org, etc.).
We can use a simple Lua filter to translate this when targeting a different...
How to add an Access-Control-Allow-Origin header
...
In your file.php of request ajax, can set value header.
<?php header('Access-Control-Allow-Origin: *'); //for all ?>
share
|
imp...
How to stop/terminate a python script from running?
...esn't stop the process. I basically have multiple threads and each of them blocks on external processes started by Popen. I need a nuclear option to kill all sub-processes created by the Python process as well as the Python process itself. Didn't find so far.
– Dici
...