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I just came across this keyword for the first time. What does it do, and when should it be used? int multiply(int ... return checked(i * j); } See Question&Answers more detail:os...

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android - Changing NumberPicker divider color

On recent android versions, number pickers use a blue divider when drawn (cf. image below). I would like to ... .<init>(NumberPicker.java:550) See Question&Answers more detail:os...

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macos - Updating php version on mac

I want to update php version, currently I have 5.5.38 and I want 7.1 What I tried so far is using this ... won't update... Any ideas? Thanks. See Question&Answers more detail:os...

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java - Whats the difference between z and in a regular expression and when and how do I use it?

From http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html: The end of the input but ... return false. Where is the mistake? See Question&Answers more detail:os...

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go - Making golang Gorilla CORS handler work

I have fairly simple setup here as described in the code below. But I am not able to get the CORS to work. I ... ", handlers.CORS()(router))) } See Question&Answers more detail:os...

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c# - View not updating after post

I have a controller method CreateOrUpdate, this method is supposed to save the car to the database and then ... if the save was successful. See Question&Answers more detail:os...

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How to use Percentage for android layout?

How can we use percentage values for android view elements? something like this <TextView android:id="@+id/" ... android:layout_height="50%"/> See Question&Answers more detail:os...

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How do I free memory in C?

I'm writing code which has a lot of 1 & 2 dimensional arrays. I got "error: can't allocate region" and I ... How should I use the free function? See Question&Answers more detail:os...

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encryption - Can I encrypt my JSON data?

I'm developing a JQuery web app that will be executed locally from a DVD. The app will read all the contents of ... only the app can read it? See Question&Answers more detail:os...

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scroll - How to detect horizontal scrolling in jQuery?

How do I detect horizontal scrolling with jQuery? This will get all scrolls: $(window).scroll(function () { ... want just the horizontal one. See Question&Answers more detail:os...

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c++ - library is linked but reference is undefined

I'm trying to compile an openCL program on Ubuntu with an NVIDIA card that worked once before, #include ... Am I missing something. See Question&Answers more detail:os...

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How does XSS work?

Can someone explain how XSS works in plain english? Maybe with an example. Googling didn't help much. See Question&Answers more detail:os...

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java - Spring security added prefix "ROLE_" to all roles name?

I have this code in my Web Security Config: @Override protected void configure(HttpSecurity http) throws Exception { ... " instead "ADMIN"? See Question&Answers more detail:os...

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javascript - AngularJS: ng-if not working in combination with ng-click?

Given this test case using AngularJS 1.2 rc3: http://plnkr.co/edit/MX6otx (repeated below) 1. <li ng- ... work in future updates of AngularJS? See Question&Answers more detail:os...

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python - Improve Pandas Merge performance

I specifically dont have performace issue with Pands Merge, as other posts suggest, but I've a class in which ... number, in minutes. Thanks See Question&Answers more detail:os...

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javascript - How do I access an iframe from CasperJS?

I have a webpage with an iframe. I'd like to access the contents of the iframe using CasperJS. In particular, ... and phantomjs version 1.6.0. See Question&Answers more detail:os...

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python - Is that a bad idea to use conda and pip install on the same environment?

Since conda install and pip install in many cases do essentially the same thing, what would be the best option? Is ... but not to the other. See Question&Answers more detail:os...

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lexer - When parsing Javascript, what determines the meaning of a slash?

Javascript has a tricky grammar to parse. Forward-slashes can mean a number of different things: division operator, ... that has the answer? See Question&Answers more detail:os...

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c# - Exposing .NET events to COM?

I've been trying to expose and fire an event to a VBA client. So far on the VBA client side, the event ... all bounty hunters, 200 rep points See Question&Answers more detail:os...

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c++ - When is std::chrono epoch?

std::chrono::time_point::time_since_epoch() returns a duration, referred to some time_point in the past. When is such ... to 1 January 1970 UTC? See Question&Answers more detail:os...

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excel - Writing a VLOOKUP function in vba

I'm trying to lookup a value on a spreadsheet within a table array using the VLOOKUP function in my vba code. I ... !AN2,DATA!AA9:AF20,5,FALSE) See Question&Answers more detail:os...

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c++ - error while loading shared libraries: libboost_system.so.1.45.0: cannot open shared object file: No such file or directory

I am building a C++ executable on Linux. The executable links into some boost libraries. This is the output ... on today. Can anyone explain? See Question&Answers more detail:os...

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c++ - How should I brace-initialize an std::array of std::pairs?

std::array<std::pair<int, int>, 2> ids = { { 0, 1 }, { 1, 2 } }; VS2013 error: error C2440 ... resolution was ambiguous` What am I doing wrong? See Question&Answers more detail:os...

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Django Programming error column does not exist even after running migrations

I run python manage.py makemigrations and I get: No changes detected Then, python manage.py migrate and I get: No ... How can I debug this??? See Question&Answers more detail:os...

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javascript - Can I load a local file into an html canvas element?

My goal is to have users on iPad load an image into a canvas, then get the base 64 encoded said ... advice is greatly appreciated! Thanks! See Question&Answers more detail:os...

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java - What's the purpose behind wildcards and how are they different from generics?

I'd never heard about wildcars until a few days ago and after reading my teacher's Java book, I'm still ... later? How are they so different? See Question&Answers more detail:os...

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ASP.NET Web API, unexpected end of MIME multi-part stream when uploading from Flex FileReference

Following the tutorial found on ASP.NET, implemented a Web API controller method for doing asynchronous file uploads ... cause of my issue. See Question&Answers more detail:os...

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html - Why does file upload not work without the enctype property?

Most of time, the source of file uploading errors are that we forget to add the enctype property in the ... work without the enctype property? See Question&Answers more detail:os...

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

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