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How can one make a Java class immutable, what is the need of immutability and is there any advantage to using this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pandas Groupby Range of Values

Is there an easy method in pandas to invoke groupby on a range of values increments? For instance given the ... statistics that may be applicable in column A? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to remove all listeners in an element?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Floating point vs integer calculations on modern hardware

I am doing some performance critical work in C++, and we are currently using integer calculations for problems that are ... . Feel free to add anything else :). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Detecting Back Button/Hash Change in URL

I just set up my new homepage at http://ritter.vg. I'm using jQuery, but very minimally. It loads all the pages ... .2 and 1 second timeouts, it pegged my CPU. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - how to listen for changes in Contact Database

I am trying to listen for any change in the contact database. So I create my contentObserver which is a child ... database, My onChange() does not get called. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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z index - Which CSS properties create a stacking context?

I'm studying about stacking contexts and doing some tests with the properties that create a stacking context ... other properties that apply a stacking context? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Calling a C# library from python

Anyone can share a working example on how to call a simple C# library (actually its WPF) from python code? ( ... this code from my python all. Any suggestions? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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datetime - JavaScript - Get minutes between two dates

If I have two dates, how can I use JavaScript to get the difference between the two dates in minutes? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iphone - Autoplay audio files on an iPad with HTML5

I'm trying to get an audio file to autoplay in Safari on an iPad. If I go to the page using Safari on my Mac, it's fine. On the iPad, autoplay does not work. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Is there a way to automatically update application on Android?

I'm developing an application that will most likely be preinstalled on devices. It will be also available on Google ... "allow install of non-Market sources".) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - How to assign the output of a Bash command to a variable?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Django Forms: if not valid, show form with error message

In Django forms, it can check whether the form is valid: if form.is_valid(): return HttpResponseRedirect('/thanks/') ... the "else" in any of the examples. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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.net - How do I restart my C# WinForm Application?

Developing a C# .NET 2.0 WinForm Application. Need the application to close and restart itself. Application. ... a better way to restart the application? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - clone() vs copy constructor vs factory method?

I did a quick google on implementing clone() in Java and found: http://www.javapractices.com/topic/ ... missing something? Any insights would be appreciated. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Converting double to string

I am not sure it is me or what but I am having a problem converting a double to string. here is my ... the information to calculate a fill the edittext box. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Change variable name in for loop using R

I have a for loop: for (i in 1:10){ Ai=d+rnorm(3)} What I would like to do is have A1, A2,A3. ... use the i in the for loop to assign different variable names? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Deleting multiple elements from a list

Is it possible to delete multiple elements from a list at the same time? If I want to delete elements at index 0 ... but I'm hoping there is a better way. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - jQuery document.ready vs self calling anonymous function

What is the difference between these two. $(document).ready(function(){ ... }); (function(){ ... })(); ... the page or it is called whenever it is encountered? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to create custom button in Android using XML Styles

I want to make this kind of button [same background & text] colors by using XML Styles that's just for an ... Android App i want to make it using XML only Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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hash - Is it safe to ignore the possibility of SHA collisions in practice?

Let's say we have a billion unique images, one megabyte each. We calculate the SHA-256 hash for the ... go ignoring this possibility, assuming it is zero? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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plot - Intelligent point label placement in R

1) Is there any R library/function which would implement INTELLIGENT label placement in R plot? I tried some but ... advance! EDIT: todo: try labcurve {Hmisc}. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Return from a promise then()

I have got a javascript code like this: function justTesting() { promise.then(function(output) { return output + 1; ... a way to return a value from a promise? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How can I change the color of AlertDialog title and the color of the line under it

I changed the color of an AlertDialog title using this command alert.setTitle( Html.fromHtml("<font color='#FF7F27'>Set ... I don't want to use a custom layout Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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typescript - How to get query params from url in Angular 2?

I use angular2.0.0-beta.7. When a component is loaded on a path like /path?query=value1 it is ... query params("/my/path?param1=value1&param2=value2") Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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string - How to remove line breaks from a file in Java?

How can I replace all line breaks from a string in Java in such a way that will work on Windows and Linux (ie no ... doesn't seem to work. How can this be done? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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html - How do I get the information from a meta tag with JavaScript?

The information I need is in a meta tag. How can I access the "content" data of the meta tag when property=" ... " content="http://video.com/video33353.mp4" /> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How to implement multi-select in RecyclerView?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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