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assigning value in python dict (copy vs reference)

I understand that in python every thing, be it a number, string, dict or anything is an object. The variable ... gotcha's . Please educate me. 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 - getting compile error for diamond operator in idea ide

I am getting this error while trying to compile some simple source code in idea ide. java: diamond operator is not ... but that had no effect. See Question&Answers more detail:os...

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

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visual studio 2010 - VS2010 CTRL+M keyboard shortcut has stopped working

I have a strange problem which seems to have recently appeared. I used to be able to press the keyboard shortcut ... of course a red herring! 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++ - Function-to-function-pointer "decay"

As we know a parameter that looks like void() will be rewritten as void(*)(). This is similar to array-to ... arguments to function func(42); ^ 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# - Is it ok to use "async" with a ThreadStart method?

I have a Windows Service that uses Thread and SemaphoreSlim to perform some "work" every 60 seconds. class ... inside a dedicated thread? See Question&Answers more detail:os...

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

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php - MySQL error when inserting data containing apostrophes (single quotes)?

When I an insert query contains a quote (e.g. Kellog's), it fails to insert a record. ERROR MSG: You have ... Kellogg's. Is there any 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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php - PDO returning incorrect, but duplicate, data. Key's not in database.

I'm new to using $pdo statements so might be something simple I haven't yet read on php.net. I'm ... prevent them from even being returned? See Question&Answers more detail:os...

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

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styles - Android different EditText backgrounds for different states using shapes, selector or list

I'm starting a new app where I use ActionBarSherlock & HoloEverywhereLib. My min & target SDK are the same (10 ... here are very much welcomed! See Question&Answers more detail:os...

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php - file_get_html displays Fatal Error Call to undefined function

I used the following code to parse the HTML of another site but it display the fatal error: $html= ... to undefined function file_get_html() See Question&Answers more detail:os...

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primitive types - Java: Why can't I cast int to Long

All numbers in Java are supposed to be of int type. The following line is legal in Java>1.5 Short s = ... variable. Any thoughts on this matter? See Question&Answers more detail:os...

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timezone - How Do I calculate the difference of 2 time zones in JavaScript?

For example, the difference in Eastern and Central is 1. My solution below feels hacky. Is there a easier / ... is using the Momentjs library. See Question&Answers more detail:os...

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c# - Convert System.Windows.Media.ImageSource to System.Drawing.Bitmap

How can I convert a System.Windows.Media.ImageSource to a System.Drawing.Bitmap in C#? See Question&Answers more detail:os...

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java - Get the cell value as how it was presented in excel

I am currently working on a project that reads an excel file using Apache POI. My task seems to be simple, I ... how it was presented in excel? 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 - postfix and openJDK 11: "No appropriate protocol (protocol is disabled or cipher suites are inappropriate)"

I know there are some other questions (with answers) to this topic. But no of these was helpful for me. I ... =javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracl...

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

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php - Jquery: Running AJAX locally without a webserver

I have the following function in a .js file in index.html function getValues(){ $.ajax({ type: 'POST', url: "http ... "=>rand(5000, 20000))); ?> See Question&Answers more detail:os...

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

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io - How to idiomatically / efficiently pipe data from Read+Seek to Write?

I want to take data from random locations in input file, and output them sequentially to output file. Preferably, ... there is a better way? See Question&Answers more detail:os...

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.htaccess rewrite URL with a question mark "?"

My aim is this URL: component/users/?view=registration To: registration.html the .htaccess is in the folder mysite ... ? Would be awesome =) See Question&Answers more detail:os...

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

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css - Why does stacking order change on webkit filter hover?

I've noticed a weird issue with my stacking order when applying a webkit filter. Why, when I hover over the image ... * For Webkit browsers */ } 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 App Installation Failed: Package com.my.app has no certificates at entry AndroidManifest.xml

in Android Studio I generated a signed APK with keystore and so on. While installing the APK onto a device it ... anybody know what's wrong? 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++ - Is there any difference between "T" and "const T" in template parameter?

Is there any difference between following 2 syntax: template<int N> struct A; // (1) and template<const int N> ... for when to use each syntax ? 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 to use ng-if with ng-repeat?

I have a simple nav object setup that lists the nav items (and whether they should appear in the primary nav or ... bunch of empty outer a tags. 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# - Why can't Double be implicitly cast to Decimal

I don't understand the casting rules when it comes to decimal and double. It is legal to do this decimal dec ... type 'double' to 'decimal' See Question&Answers more detail:os...

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

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css - Select odd even child excluding the hidden child

Line 3 is a hidden <div> . I don't want that one to be taken from the odd/even css rule. What is the best ... div class="box">7</div> </div> 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++ - checking data availability before calling std::getline

I would like to read some data from a stream I have using std::getline. Below a sample using the std::cin. std: ... getline( std::cin, line ); } See Question&Answers more detail:os...

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

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strtotime - DateTime class vs. native PHP date-functions

The DateTime class sure has some handy methods and seems overall superior to the native PHP date functions like ... the time between two dates 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 ignore acute accent in a javascript regex match?

I need to match a word like 'César' for a regex like this /^cesar/i. Is there an option like /i to configure ... a regex like this /^césar/i. 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++ - Exception Error c0000005 in VC++

Am working on VC++ Console Application. This application sends a file from AppdataRoaming folder for a period of ... me to resolve this issue 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 import module from parent package

I have the following directory structure foo/ __init__.py settings.py bar/ __init__.py myfile.py In myfile.py ... settings file from myfile.py See Question&Answers more detail:os...

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

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