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How can I make a JUnit Test wait?
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If you are using code analysis tools like sonarqube they will complain about Thread.sleep saying something like Using Thread.sleep in a test is just generally a bad idea. It creates brittle tests that can fail unpredictably ...
App Inventor 2 JSON数据解析教程 - 解析API返回的JSON数据 · App Inventor 2 中文网
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when Web1.GotText(url, responseCode, responseType, responseContent) {
if responseCode == 200 {
var jsonData = Web1.JsonTextDecodeWithDictionaries(responseContent)
var title = getDictionaryValue(jsonData, "title")
var body = getDictionaryValue(jsonData, "body")
Label1.Text = titl...
how do I initialize a float to its max/min value?
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@Yacoby, you might want to clarify that numeric_limits<float>::min() doesn't mean most negative value, it means smallest positive.
– MSN
Apr 21 '10 at 16:35
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Can pandas automatically recognize dates?
...rser=dateparse)
You can find directives (i.e. the letters to be used for different formats) for strptime and strftime in this page.
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Seedable JavaScript random number generator
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If you don't need the seeding capability just use Math.random() and build helper functions around it (eg. randRange(start, end)).
I'm not sure what RNG you're using, but it's best to know and document it so you're aware of i...
Safely casting long to int in Java
What's the most idiomatic way in Java to verify that a cast from long to int does not lose any information?
10 Answers
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How can I concatenate two arrays in Java?
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How is it "cheating" if it answers the question? Sure, having an extra dependency is probably overkill for this specific situation, but no harm is done in calling out that it exists, especially since there's so many excellent bits of functionalit...
Difference between Ctrl+Shift+F and Ctrl+I in Eclipse
I have been used Ctrl + Shift + F to correct indentation but I heard there is another shortcut to do that: Ctrl + I
4 An...
getActivity() returns null in Fragment function
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I didn't understand how you can solve your problem. If my getActivity() isn't stille ready, how can I get the reference of FragmentActivity object?
– CeccoCQ
Aug 8 '11 at 10:12
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How to efficiently build a tree from a flat structure?
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Store IDs of the objects in a hash table mapping to the specific object. Enumerate through all the objects and find their parent if it exists and update its parent pointer accordingly.
class MyObject
{ // The actual object
public int ParentID { get; set; }
public int ID { get...