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c++ - How can you iterate over the elements of an std::tuple?

How can I iterate over a tuple (using C++11)? I tried the following: for(int i=0; i<std::tuple_size<T. ... do I correctly iterate over the elements of a tuple? Question&Answers:os...

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

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wix - How can I compare the content of two (or more) MSI files?

How can I do a "content compare" of two (or more) MSI files and see what is actually different inside ... to determine what real "content differences" exist. Question&Answers:os...

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

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r - Evaluate expression given as a string

I'm curious to know if R can use its eval() function to perform calculations provided by e.g. a string. This is a common ... 10 I get: [1] "5+5" Any solution? Question&Answers:os...

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

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javascript - How to use arrow functions (public class fields) as class methods?

I'm new to using ES6 classes with React, previously I've been binding my methods to the current object (show ... the class instance, and not the window object. Question&Answers:os...

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

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Is there a CSS selector for text nodes?

What I would like to do (not in IE obviously) is: p:not(.list):last-child + :text { margin-bottom: 10px; ... possible?) How would I get the text node with CSS? Question&Answers:os...

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

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c# - How do parameterized queries help against SQL injection?

In both queries 1 and 2, the text from the textbox is inserted into the database. What's the ... Expression validation to stop insertion of illegal characters. Question&Answers:os...

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

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Does VBA have Dictionary Structure?

Does VBA have dictionary structure? Like key<>value array? Question&Answers:os...

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

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Parameter evaluation order before a function calling in C

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

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hex - How to convert decimal to hexadecimal in JavaScript

How do you convert decimal values to their hexadecimal equivalent in JavaScript? Question&Answers:os...

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

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mcrypt - Best way to use PHP to encrypt and decrypt passwords?

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

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c# - Calculate difference between two dates (number of days)?

I see that this question has been answered for Java, JavaScript, and PHP, but not C#. So, how might one calculate the number of days between two dates in C#? Question&Answers:os...

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

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c++ - Using getline(cin, s) after cin

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

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rest - How do I POST JSON data with cURL?

I use Ubuntu and installed cURL on it. I want to test my Spring REST application with ... sendError(HttpServletResponse.SC_NOT_FOUND); return configuration; } Question&Answers:os...

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

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android - Unable to merge dex

I have Android Studio Beta. I created a new project with compile my old modules but when I tried launching the app it ... not imported app did not work. :D :D Question&Answers:os...

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

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shell - While loop stops reading after the first line in Bash

I have the following shell script. The purpose is to loop thru each line of the target file (whose path is the ... do_work.sh, I run a couple of ssh commands. Question&Answers:os...

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

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Java default constructor

What exactly is a default constructor - can you tell me which one of the following is a default constructor and ... credits = credits; this.hours = hours; } Question&Answers:os...

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

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284 views

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php - PDOException “could not find driver”

I have just installed Debian Lenny with Apache, MySQL, and PHP and I am receiving a PDOException could not ... experts-exchange and examples, but no solutions. Question&Answers:os...

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

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73 views

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c# - How to pass data (and references) between scenes in Unity

How can I pass score value from one scene to another? I've tried the following: Scene one: void Start () ... game will run in android devices). Any suggestion? Question&Answers:os...

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

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python - Flask view return error "View function did not return a response"

I have a view that calls a function to get the response. However, it gives the error View function did not return a ... , 'POST']) def hello(): return "test" Question&Answers:os...

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

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javascript - How can I get the data-id attribute?

I'm using the jQuery Quicksand plugin. I need to get the data-id of the clicked item and pass it to a webservice. How do I ... get data-id" /> </a> </li> </ul> Question&Answers:os...

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

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196 views

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Illegal string offset Warning PHP

I get a strange PHP error after updating my php version to 5.4.0-3. I have this array: Array ( [host] => ... just edit my php.ini and re-set the error level. Question&Answers:os...

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

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150 views

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sql server - SQL, Auxiliary table of numbers

For certain types of sql queries, an auxiliary table of numbers can be very useful. It may be created as a ... is the optimal way to create such a function? Question&Answers:os...

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

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493 views

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routing - Is it possible to make an ASP.NET MVC route based on a subdomain?

Is it possible to have an ASP.NET MVC route that uses subdomain information to determine its route? For ... same controller/action with a username parameter? Question&Answers:os...

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

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java - How to write files to external public storage in Android so that they are visible from Windows?

My app should save files to a place where, when you connect your phone/tablet to a computer, you can ... implementation): What is wrong with my implementation? Question&Answers:os...

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

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How is Docker different from a virtual machine?

I keep rereading the Docker documentation to try to understand the difference between Docker and a full ... deploying to a consistent production environment? Question&Answers:os...

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

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How do I get a file extension in PHP?

This is a question you can read everywhere on the web with various answers: $ext = end(explode('.', $filename)) ... way" and it should be on Stack Overflow. Question&Answers:os...

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

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150 views

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asp.net mvc - Update relationships when saving changes of EF4 POCO objects

Entity Framework 4, POCO objects and ASP.Net MVC2. I have a many to many relationship, lets say between BlogPost ... many-to-many relationships in my app :(. Question&Answers:os...

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

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403 views

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reactjs - When to use React setState callback

When a react component state changes, the render method is called. Hence for any state change, an action ... use case for the setState callback then? Question&Answers:os...

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

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