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What would be a good way to convert hex color values like #ffffff into the single RGB values 255 255 255 using PHP? See Question&Answers more detail:os...

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

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objective c - Is it necessary to assign a string to a variable before comparing it to another?

I want to compare the value of an NSString to the string "Wrong". Here is my code: NSString *wrongTxt = [[ ... the label value to a string? See Question&Answers more detail:os...

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

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Iterating over basic “for” loop using Handlebars.js

I'm new to Handlebars.js and just started using it. Most of the examples are based on iterating over an object. ... } How can this be achieved? 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 - What is viewport in HTML.

What is viewport in HTML? Could you give some examples on how to access the viewport details? See Question&Answers more detail:os...

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

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I'm trying to use python in powershell

I'm trying to follow Zed Shaw's guide for Learning Python the Hard Way. I need to use python in Powershell. ... I need it in Powershell. Thanks. See Question&Answers more detail:os...

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

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internationalization - set language within a django view

background: The view is called when a payment service pings back a payment outcome behind the scenes - afterwhich I ... to do it? Cheers, Guy See Question&Answers more detail:os...

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

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ios - Show iPhone cut copy paste menu on UILabel

Can we enable the cut copy paste menu for a UILabel as it is for a UITextField? If not, and I need to ... not allow the content to be modified? See Question&Answers more detail:os...

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

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Remove a directory permanently from git

In my personal git repo, I have a directory that contains thousands of small images that are no longer needed. ... unchanged. Any ideas? Thanks See Question&Answers more detail:os...

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

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What should I know about Structured Exceptions (SEH) in C++?

What important points about Structured Exceptions should every C++ developer know? See Question&Answers more detail:os...

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

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ios - How to implement UISearchController in UITableView - Swift

I am a newbie to Swift and I am trying to add search functionality to my UITableView which is in ... in UIViewController type class. See Question&Answers more detail: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 NavigationView's item text size?

Google recently released the android.support.design.widget.NavigationView widget as part of the com.android.support:design: ... any other 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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How to reset migrations in Django 1.7

(I know there is a title the same as this, but the question is different). I have managed to ... changes on my development machine afterwards See Question&Answers more detail:os...

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

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performance - MySQL: Many tables or many databases?

For a project we having a bunch of data that always have the same structure and is not linked together. ... Many tables or many databases? See Question&Answers more detail:os...

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

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ruby - How to use gem to install Rails on Ubuntu

The error message: Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: ... 08) [x86_64-linux-gnu] See Question&Answers more detail:os...

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

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How to install Android Studio on Ubuntu?

I have to install Android Studio on Ubuntu and I have used this link to download Android Studio. Is there any ... to install Studio on Ubuntu? See Question&Answers more detail:os...

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

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coercion - In Ruby, how does coerce() actually work?

It is said that when we have a class Point and knows how to perform point * 3 like the following: class Point def ... - point #=> (-80,-80) See Question&Answers more detail:os...

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

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Negative numbers to binary string in JavaScript

Anyone knows why javascript Number.toString function does not represents negative numbers correctly? //If you try ... find anything that helps. 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 - prevent touchstart when swiping

I have a scrollable list on a mobile device. They want people to be able to scroll the list via swiping, ... best practice here to resolve this? See Question&Answers more detail:os...

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

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GDB kind of doesn't work on macOS Sierra

It is a problem that appeared when I first updated to macOS Sierra yesterday. GDB itself is running OK. ... might have some magical solution. See Question&Answers more detail:os...

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

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c# - Dynamically creating a proxy class

I am trying to create a proxy class dynamically. I know there are some very good frameworks out there to do ... .Emit and generate the MSIL? See Question&Answers more detail:os...

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

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c++ - Differences of using "const cv::Mat &", "cv::Mat &", "cv::Mat" or "const cv::Mat" as function parameters?

I've searched thoroughly and have not found a straightforward answer to this. Passing opencv matrices (cv:: ... difference. Thanks guys! See Question&Answers more detail:os...

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

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ios - Core Bluetooth advertise and scan in the background

I have been trying to setup an app to make the device both scan for peripherals and advertise as a peripheral. ... How can I fix this? Thanks See Question&Answers more detail:os...

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

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C++ class with template member variable

I am trying to solve a programming problem that consists of an object (call it Diagram), that contains several ... to use boost::any. 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 - How do I URl encode something in Node.js?

I want to URL encode this: SELECT name FROM user WHERE uid = me() Do I have to download a module for this? I already have the request module. 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 - TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined raised when starting react app

I'm working on a project in React and ran into a problem that has me stumped. Whenever I run yarn ... experienced this I would be grateful. See Question&Answers more detail:os...

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

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python - Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?

I've started to use the IPython Notebook and am enjoying it. Sometimes, I write buggy code that takes massive memory ... Firefox on Mac OS X. See Question&Answers more detail:os...

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

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Tab separated values in awk

How do I select the first column from the TAB separated string? # echo "LOAD_SETTLED LOAD_INIT 2011-01-13 03:50:01" ... "}' >> /pdump/temp.txt See Question&Answers more detail:os...

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

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model - Django Queryset with filtering on reverse foreign key

I have the following Django model: class Make: name = models.CharField(max_length=200) class MakeContent: make = ... where published = True. See Question&Answers more detail:os...

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

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