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Java math function to convert positive int to negative and negative to positive?

Is there a Java function to convert a positive int to a negative one and a negative int to a positive one? I'm looking for ... -5 -> 5 5 -> -5 See Question&Answers more detail:os...

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

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javascript - ArrayBuffer to blob conversion

I have a project where I need to display djvu schemas in browser. I found this old library on Github which, as ... is: what I am doing wrong? See Question&Answers more detail:os...

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How to delete an object by id with entity framework

It seems to me that I have to retrieve an object before I delete it with entity framework like below var customer = ... . Is there a easier way? See Question&Answers more detail:os...

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

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java - Is there an insertion order preserving Set that also implements List?

I'm trying to find an implementation of java.util.List and java.util.Set at the same time in Java. I ... can insert into a specific position. See Question&Answers more detail:os...

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Cannot find the '@angular/common/http' module

I am following this fundamental tutorial on Angular about Http. As one can see in the "Setup: Installing the ... to update all my packages. See Question&Answers more detail:os...

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

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geolocation - Identifying country by IP address

Is there a way to figure out the country name just by looking at an IP address? I mean, do countries have ... 54.65.98 (just an example) See Question&Answers more detail:os...

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How can I make reCAPTCHA a required field?

I'm using Google reCAPTCHA and have been able to add the CAPTCHA component to my page inside a form. ... make my CAPTCHA component required? See Question&Answers more detail:os...

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ios - StartUpdateLocations in Background, didUpdatingToLocation only called 10-20 times

Testing Device: iPhone 5 (iOS 7) I have an app that uses RegionMonitoring and updateLocation. If a region is entered ... How can I solve this? See Question&Answers more detail:os...

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python - Numpy minimum in (row, column) format

How can I know the (row, column) index of the minimum of a numpy array/matrix? For example, if A = array([[1, 2 ... I want to get (1, 1) Thanks! See Question&Answers more detail:os...

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android - Cannot resolve method 'getSupportFragmentManager ( )' inside Fragment

I found the message Cannot resolve method 'getSupportFragmentManager ( )' I want to fragment as activity. because I ... = fm.getMap(); See Question&Answers more detail:os...

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

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sql server - Joining multiple tables in SQL

Can sombody Explains me about joins? Inner join selects common data based on where condition. Left outer join ... help me regarding this. See Question&Answers more detail:os...

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gis - See if lat / long falls within a polygon using mysql

I have the created the table below CREATE TABLE geom (g GEOMETRY); and have inserted many rows, example below: ... me in the right direction? See Question&Answers more detail:os...

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Word wrap in generated PDF (using jsPDF)?

what I'm doing is using jsPDF to create a PDF of the graph I generated. However, I am not sure how ... the reportTitle from running off the page See Question&Answers more detail:os...

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ASP.net MVC - Display Template for a collection

I have the following model in MVC: public class ParentModel { public string Property1 { get; set; } public ... the model type being wrong? See Question&Answers more detail:os...

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nsurlconnection - iPhone SDK: How do you download video files to the Document Directory and then play them?

I've been fooling around with code for ages on this one, I would be very grateful if someone could provide ... Any help is greatly appreciated. See Question&Answers more detail:os...

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c# - Attach Debugger to IIS instance

I have IIS 5.1 on a XP machine, and visual studio 2005. How do I go about attaching my debugger to IIS instance ... 't know what to look for . See Question&Answers more detail:os...

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node.js - MomentJS getting JavaScript Date in UTC

I am not able to get the JavaScript Date string for MongoDB record via the following. It keeps using my local time. ... Date. How can I do that? See Question&Answers more detail:os...

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javascript - Are data attribute css selectors faster than class selectors?

A few months ago this article pointed out that classes could actually be avoided all together from website development ... jQuery(".something")? See Question&Answers more detail:os...

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objective c - What's the difference between declaring a variable "id" and "NSObject *"?

In Objective-C, what's the difference between declaring a variable id versus declaring it NSObject *? See Question&Answers more detail:os...

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angular2 directives - How to import component into another root component in Angular 2

I am trying to import component from one file another root component file. it give error as .. zone.js:484 ... Please advise solution over it. See Question&Answers more detail:os...

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How to close Android Soft KeyBoard programmatically?

I am currently showing softkeyboard using the following code InputMethodManager imm = (InputMethodManager) getSystemService( ... used editText. See Question&Answers more detail:os...

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

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WPF MVVM: Convention over Configuration for ResourceDictionary?

Update In the wiki spirit of StackOverflow, here's an update: I spiked Joe White's IValueConverter suggestion below. ... </DataTemplate>", ...) See Question&Answers more detail:os...

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iOS 7 - is there a way to disable the swipe back and forward functionality in Safari?

For some web pages we use the swipe left and right functionality of iPhone to pull up the menus. Now with ... behavior on the swipe actions? See Question&Answers more detail:os...

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

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javascript - moment.js isValid function not working properly

I have this question... I haven't found anything similar and it also seems very strange that nobody had this ... http://jsfiddle.net/vCGAp/145/ See Question&Answers more detail:os...

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http - Android: UnknownHostException

I am using Android SDK 2.2, testing my application with the emulator. I want to send a HTTP Post. When I do I ... "IOException thrown" + e ); } See Question&Answers more detail:os...

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android - Difference between getString() and getResources.getString()

I noticed that the Activity class has two different methods to get a String resource. This is possible by using: ... . Can somebody tell me? See Question&Answers more detail:os...

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windows - How to fix "unable to write 'random state' " in openssl

While generating the private key using this command genrsa -out my-prvkey.pem 1024 It throws the error like below ... help me for the fix? See Question&Answers more detail:os...

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statistics - git find fat commit

Is it possible to get info about how much space is wasted by changes in every commit - so I can find ... (rebasing and maybe filtering commits) See Question&Answers more detail:os...

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

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