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html - Square DIV where height is equal to viewport

I need to create a DIV where width=height, and height=100% of the viewport (which, obviously, is ... pointers would be much appreciated. See Question&Answers more detail:os...

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

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762 views

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apache spark - Reading csv files with quoted fields containing embedded commas

I am reading a csv file in Pyspark as follows: df_raw=spark.read.option("header","true").csv(csv_path) However, ... -22,1333,2019-11-23,CODEBLUE 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 - Convert to date format dd/mm/yyyy

I have the following date: 2010-04-19 18:31:27. I would like to convert this date to the dd/mm/yyyy format. 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 can I verify that I am running on a given GCD queue without using dispatch_get_current_queue()?

Recently, I had the need for a function that I could use to guarantee synchronous execution of a given block on ... I can prevent a deadlock? 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 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...

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

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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...

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

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performance - How expensive are Python dictionaries to handle?

As the title states, how expensive are Python dictionaries to handle? Creation, insertion, updating, deletion, all ... tuples or normal lists. 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 - IOException: "Received authentication challenge is null" (Apache Harmony/Android)

I am trying to send a GET via Android's HttpURLConnection (imported from org.apache.harmony.luni.internal.net.www. ... (); // throws IOException 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 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...

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

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c# - Get previous and next item in a IEnumerable using LINQ

I have an IEnumerable of a custom type. (That I've gotten from a SelectMany) I also have an item ... with readability being my primary concern. 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 - Android Context.bindService always returns false and ServiceConnection object is never triggered

I have followed the Local Service example provided by Google, but my Context::bindService(...) always returns ... am targeting Android 1.6 See Question&Answers more detail:os...

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

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Windows Azure Websites is overriding my 404 and 500 error pages in my node.js app

I am using Windows Azure Websites to host a node.js application. So far everything is great except for my ... is responsible. Any suggestions? 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 can I get the source code for the linux utility tail?

this command is really very useful but where I can get the source code to see what is going on inside . 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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regex - How to replace all characters in a Java string with stars

I want to replace all the characters in a Java String with * character. So it shouldn't matter what character ... tried myself but no success. 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 - Making a HTTP GET request with HTTP-Basic authentication

I need to build a proxy for a Flash Player project I'm working on. I simply need to make a HTTP GET request ... source. How can I do 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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784 views

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Android - Open target _blank links in WebView with external browser

I build a WebView which displays a website. The website contains links without a target="_blank" attribute and ... is the target attribute. 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 - Why BCryptPasswordEncoder from Spring generate different outputs for same input?

I am using BCryptPasswordEncoder with Spring security. My expectation was that for the same input I will ... behave like 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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572 views

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database - Spring data : CrudRepository's save method and update

I wanted to know if the {save} method in CrudRepository do an update if it finds already the entry in the ... a changed attribute ? 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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254 views

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Google Analytics blocks Android App

I use Google Analytics in my Android App and it works well. After updating the SDK (google play service) ... again without freezing at startup? 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 - How to read pdf stream in angularjs

I got the following PDF stream from a server: How can this stream be read in AngularJS? I tried to open ... see the content in opened window. 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 get current CPU and RAM usage in C++?

is it possible, in C++, to get the current RAM and CPU usage? Is there a platform-indepentent function call? See Question&Answers more detail:os...

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

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179 views

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How to call external JavaScript function in HTML

I have a small chunk of code I can't seem to get working. I am building a website and using JavaScript ... displayed across, no form attached. See Question&Answers more detail:os...

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

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networking - How to disable/enable network connection in c#

Basically I'm running some performance tests and don't want the external network to be the drag factor. I'm ... point home that would be cool. See Question&Answers more detail:os...

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

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397 views

1 answer

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...

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

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What Does It Mean For a C++ Function To Be Inline?

See title: what does it mean for a C++ function to be inline? See Question&Answers more detail:os...

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

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686 views

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sql - Solution to "cannot perform a DML operation inside a query"?

I am using a Data Analysis tool and the requirement I have was to accept a value from the user, pass that ... why it is illegal/not recommended See Question&Answers more detail:os...

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

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345 views

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python - Querying full name in Django

How can I query on the full name in Django? To clarify, I essentially want to do create a temporary column, ... and last name 'Paul Smith'. See Question&Answers more detail:os...

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

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796 views

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networking - Sending UDP Packet in C#

I have a game server (WoW). I want my players to download my custom patches to the game. I've done a program ... packet to a server. Thank you! See Question&Answers more detail:os...

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

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