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html - How to tell if a browser is in "quirks" mode?

Let's suppose you have a page with a relatively strict doctype and HTML markup that's pretty close to compliant, but ... to force it or do you have some leeway? Question&Answers:os...

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

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xml - XPath to select element based on childs child value

Trying to select an element based on the value of one of it's childrens childrens Thinking the following but not working, ... /book> <book>...</book> </list> Question&Answers:os...

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

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android - Eclipse error "ADB server didn't ACK, failed to start daemon"

After updating the SDK, Eclipse shows this error: ADB server didn't ACK, failed to start daemon. When I run an ... can be executed. How can I fix this problem? Question&Answers:os...

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

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inheritance - Java dynamic binding and method overriding

Yesterday I had a two-hour technical phone interview (which I passed, woohoo!), but I completely muffed up the ... type of the reference. What am I missing? Question&Answers:os...

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

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android - PANIC: Broken AVD system path. Check your ANDROID_SDK_ROOT value

After typing cordova run android in terminal, I'm getting this error: Waiting for emulator to start... PANIC: ... why am I getting broken avd system path? Question&Answers:os...

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

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How to change the default docker registry from docker.io to my private registry?

By default, if I issue command: sudo docker pull ruby:2.2.1 it will pull from the docker.io ... like: Pulling repository my_private.registry:port/library/ruby Question&Answers:os...

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

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python - How do I sum values in a column that match a given condition using pandas?

Suppose I have a column like so: a b 1 5 1 7 2 3 1 3 2 5 I want to sum up the values for b where a = 1, for ... 5 + 7 + 3 = 15. How do I do this in pandas? Question&Answers:os...

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

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python - Using moviepy, scipy and numpy in amazon lambda

I'd like to generate video using AWS Lambda feature. I've followed instructions found here and here. And I now have ... Size: 1536 MB Max Memory Used: 14 MB Question&Answers:os...

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

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mysql - Insert auto increment primary key to existing table

I am trying to alter a table which has no primary key nor auto_increment column. I know how to add an primary ... do it manually). Any thoughts? Thanks a lot. Question&Answers:os...

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

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javascript - Prevent jQuery UI dialog from setting focus to first textbox

I have setup a jQuery UI modal dialog to display when a user clicks a link. There are two textboxes (I only show the ... (jQuery("form:first")); }); </script> Question&Answers:os...

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

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.net - Why doesn't C# support the return of references?

I have read that .NET supports return of references, but C# doesn't. Is there a special reason? Why I can't do ... y) return ref x; else return ref y; } Question&Answers:os...

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

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Using a bitmask in C#

Let's say I have the following int susan = 2; //0010 int bob = 4; //0100 int karen = 8; //1000 ... one I'm interested in, but this also seems overly complex. Question&Answers:os...

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

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How do conversion operators work in C++?

Consider this simple example: template <class Type> class smartref { public: smartref() : data(new Type) ... the type defined after the conversion operator? Question&Answers:os...

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

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python - How to index into a dictionary?

I have a Dictionary below: colors = { "blue" : "5", "red" : "6", "yellow" : "8", } How do ... dictionary? colors[0] will return a KeyError for obvious reasons. Question&Answers:os...

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

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algorithm - Pseudorandom Number Generator - Exponential Distribution

I would like to generate some pseudorandom numbers and up until now I've been very content with the . ... suggestions / code snippets / algorithms / thoughts? Question&Answers:os...

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

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android - Firebase FCM notifications click_action payload

I am trying to open a particular activity when the user clicks the notification when the app is in the background ... other Work Around too. Thanks in Advance. Question&Answers:os...

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

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240 views

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New line in JavaScript alert box

How do you put in a new line into a JavaScript alert box? Question&Answers:os...

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

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310 views

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mysql - Difference between float and decimal data type

What difference does it make when I use float and decimal data types in MySQL?. When should I use which? Question&Answers:os...

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

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php - Copy Image from Remote Server Over HTTP

I am looking for a simple way to import/copy images from remote server to a local folder using PHP. I have no ... image but to import and serve from my domain. Question&Answers:os...

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

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146 views

1 answer

Sql Server equivalent of a COUNTIF aggregate function

I'm building a query with a GROUP BY clause that needs the ability to count records based only on a certain ... implement this in a MS SQL 2005 environment? Question&Answers:os...

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

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1.1k views

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closures - nonlocal keyword in Python 2.x

I'm trying to implement a closure in Python 2.6 and I need to access a nonlocal variable but it seems ... variables in closures in these versions of python? Question&Answers:os...

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

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Android Studio emulator does not come with Play Store for API 23

I selected this emulator from the newest version of Android Studio AVD. I have selected the latest version of ... buy actual devices to develop for API 23? Question&Answers:os...

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

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70 views

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javascript - JS function to calculate complementary colour?

Does anybody know, off the top of your heads, a Javascript solution for calculating the complementary colour of a ... a snippet would be very much appreciated. Question&Answers:os...

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

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155 views

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c# - Sending Arguments To Background Worker?

Let's say I want to sent an int parameter to a background worker, how can this be accomplished? private ... worker_DoWork that it should take an int parameter. Question&Answers:os...

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

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301 views

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android - How to avoid soft keyboard pushing up my layout?

This question already has answers here: Question&Answers:os...

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

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How to add multiple values to a dictionary key in python?

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

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343 views

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algorithm - Cycles in an Undirected Graph

Given an undirected graph G=(V, E) with n vertices (|V| = n), how do you find if it contains a cycle in O(n)? Question&Answers:os...

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

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c++ - What are some reasons a Release build would run differently than a Debug build

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

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