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Difference between method and function in Scala

I read Scala Functions (part of Another tour of Scala). In that post he stated: Methods and functions are not the ... about it. What was he trying to say? Question&Answers:os...

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javascript - Why is setState in reactjs Async instead of Sync?

I have just found that in react this.setState() function in any component is asynchronous or is called after the ... stuff, or there is some other design issue. Question&Answers:os...

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python - Keyboard input with timeout?

How would you prompt the user for some input but timing out after N seconds? Google is pointing to a mail ... got 2 which somehow the except fails to catch. Question&Answers:os...

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python - How can I concatenate str and int objects?

If I try to do the following: things = 5 print("You have " + things + " things.") I get the following ... and 'int' objects How can I get around this problem? Question&Answers:os...

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c# - How can I convert a hex string to a byte array?

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Regex Match all characters between two strings

Example: "This is just a simple sentence". I want to match every character between "This is" and "sentence". ... . I can't figure out the correct syntax. Question&Answers:os...

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html - Why is there an unexplainable gap between these inline-block div elements?

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javascript - When are you supposed to use escape instead of encodeURI / encodeURIComponent?

When encoding a query string to be sent to a web server - when do you use escape() and when do ... =value2"); encodeURIComponent("var1=value1&var2=value2"); Question&Answers:os...

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git - pull/push from multiple remote locations

The short: is there a way to have a git repo push to and pull from a list of remote repos (rather ... one machine to the other and continue working seamlessly. Question&Answers:os...

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c++ - What is the curiously recurring template pattern (CRTP)?

Without referring to a book, can anyone please provide a good explanation for CRTP with a code example? Question&Answers:os...

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oop - What __init__ and self do in Python?

I'm learning the Python programming language and I've came across something I don't fully understand. In a method ... constructs, but I don't know very much. Question&Answers:os...

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php - Seo Friendly URL results in CSS IMG and JS not working

I want to make my URL as SEO Friendly URL. I tried editing .htaccess file by rewriting rule RewriteRule ^ ... http://www.example.com/swift-details/2/abblinbb Question&Answers:os...

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What is a word boundary in regex?

I'm trying to use regexes to match space-separated numbers. I can't find a precise definition of ("word ... minus).matches()); This returns: true false true Question&Answers:os...

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ecmascript 6 - What do multiple arrow functions mean in JavaScript?

I have been reading a bunch of React code and I see stuff like this that I don't understand: handleChange = ... e.preventDefault(); /// Do something here } Question&Answers:os...

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python - Loop "Forgets" to Remove Some Items

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r - Finding ALL duplicate rows, including "elements with smaller subscripts"

R's duplicated returns a vector showing whether each element of a vector or data frame is a duplicate of an element ... by a row with a larger subscript too. Question&Answers:os...

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c++ - What does "dereferencing" a pointer mean?

Please include an example with the explanation. Question&Answers:os...

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How are parameters sent in an HTTP POST request?

In an HTTP GET request, parameters are sent as a query string: http://example.com/page?parameter=value&also=another ... request body? What does it look like? Question&Answers:os...

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jsf 2 - How to provide a file download from a JSF backing bean?

Is there any way of providing a file download from a JSF backing bean action method? I have tried ... of the response from the current FacesContext? Question&Answers:os...

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java - String replace method is not replacing characters

I have a sentence that is passed in as a string and I am doing a replace on the word "and" and I want to ... " "); } Is there something I am missing here. Question&Answers:os...

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python - "Large data" workflows using pandas

I have tried to puzzle out an answer to this question for many months while learning pandas. I use ... or features in statistics/machine learning parlance). Question&Answers:os...

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windows - Example of delayed expansion in batch file

Can someone give me an example of where a batch script would act differently with or without delayed expansion? ... NOT want to use delayed expansion? Thanks. Question&Answers:os...

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c# - The calling thread cannot access this object because a different thread owns it

My code is as below public CountryStandards() { InitializeComponent(); try { FillPageControls(); } catch (Exception ex) ... thread owns it. What's wrong here? Question&Answers:os...

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c++ - Does a const reference class member prolong the life of a temporary?

Why does this: #include <string> #include <iostream> using namespace std; class Sandbox { public: Sandbox(const string& ... is: Instead of: The answer is: four Question&Answers:os...

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python - How to have one colorbar for all subplots

I've spent entirely too long researching how to get two subplots to share the same y-axis with a single colorbar ... cbar = plt.colorbar(ax=ax2) plt.show() Question&Answers:os...

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c# - Pass An Instantiated System.Type as a Type Parameter for a Generic Class

The title is kind of obscure. What I want to know is if this is possible: string typeName = <read type name from ... There has got to be a way to do this. Question&Answers:os...

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java - How to parse a date?

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javascript - Convert Array to Object

What is the best way to convert: ['a','b','c'] to: { 0: 'a', 1: 'b', 2: 'c' } Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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