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Receiving "wrong name" NoClassDefFoundError when executing a Java program from the command-line

I have a problem while trying executing my java application. Whenever I try to execute the program through the ... perfectly. How do I solve the problem? Question&Answers:os...

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

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732 views

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casting - covariance in c#

Is it possible to cast a List<Subclass> to List<Superclass> in C# 4.0? Something along these lines: class joe ... the only alternative is to create a new List Question&Answers:os...

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

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710 views

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types - Extremely large numbers in javascript

I'm working on the Project Euler problems (currently question 13). For this question I have to find the first 10 ... 'd like to stick to pure JS if possible. Question&Answers:os...

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

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maven - java.lang.NoClassDefFoundError: org/apache/spark/Logging

I'm always getting the following error.Can somebody help me please? Exception in thread "main" java.lang. ... > </dependency> </dependencies> </project> Question&Answers:os...

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

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php - How to add anchor tag to a URL from text input

I want to be able to take user inputted text in a comment field and check for URL type expression, and if it exists, ... .us/">http://checkthis.us/</a></div> Question&Answers:os...

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

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database - What are the design criteria for primary keys?

Choosing good primary keys, candidate keys and the foreign keys that use them is a vitally important database ... design criteria. What are the criteria? Question&Answers:os...

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

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r - Simplest way to get rbind to ignore column names

This came up just in an answer to another question here. When you rbind two data frames, it matches columns by name ... like rbind(df,df[,2:1],byIndex=T). Question&Answers:os...

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

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performance - Is there any guarantee of alignment of address return by C++'s new operation?

Most of experienced programmer knows data alignment is important for program's performance. I have seen some programmer wrote ... myself, if not, I have to. Question&Answers:os...

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

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javascript - error : Permission denied to access property 'document'

How can I fix this message in Firefox? I am using an Iframe which has an anchor tag? I would like to get ... //.getElementsByClassName('a'); anchor.onclick.... Question&Answers:os...

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

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crash - readRDS(file) in R

Whenever I try to install a package in R, I get the following error: Error in readRDS(file) : unknown ... packages I've installed) and starting over? Thanks Question&Answers:os...

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

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html - Fonts on the Web

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

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140 views

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Javascript - how to avoid blocking the browser while doing heavy work?

I have such a function in my JS script: function heavyWork(){ for (i=0; i<300; i++){ ... easy" and not block everything between calls to doSomethingHeavy? Question&Answers:os...

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

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329 views

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php - How to send email from localhost WAMP Server to send email Gmail Hotmail or so forth?

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

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How can I get the Windows system time with millisecond resolution?

How can I get the Windows system time with millisecond resolution? If the above is not possible, then how ... with millisecond resolution. Thank you in advance. Question&Answers:os...

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

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php - declare property as object?

How do you declare a class property as an object? I tried: public $objectname = new $Object(); But it ... instantiate that object and just use its members? Question&Answers:os...

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

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202 views

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css - How to use Font Awesome from webjars.org with JSF

I am trying to use Font Awesome icons with my JSF application. I have had some success by following the getting ... to do. Any pointers would be great! Cheers. Question&Answers:os...

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

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976 views

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d3.js - Loading external csv file in jsfiddle

I am trying to create a jsfiddle for one of the dc.js examples. I am not able to load an external file using a ... to load a csv file using d3.csv in jsfiddle. Question&Answers:os...

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

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262 views

1 answer

How can you control .NET DataContract serialization so it uses XML attributes instead of elements?

If I have a class marked as a DataContract and a few properties on it marked with DataMember attributes I can serialize ... What is the easiest way to do this? Question&Answers:os...

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

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387 views

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sql - Oracle - ORA-01489: result of string concatenation is too long

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

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why $(window).load() is not working in jQuery?

I'm learning jQuery using visual studio and testing my code in Chrome browser. This is my HTML code <!DOCTYPE ... why my browser doesn't alert "window Loaded"? Question&Answers:os...

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

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647 views

1 answer

map - Scala: Why mapValues produces a view and is there any stable alternatives?

Just now I am surprised to learn that mapValues produces a view. The consequence is shown in the following ... collection methods that have this trap. Thanks. Question&Answers:os...

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

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186 views

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php - Accessing Class Properties with Spaces

stdClass Object ([Sector] => Manufacturing [Date Found] => 2010-05-03 08:15:19) So I can access [Sector] by ... ->Sector but how can I access [Date Found] ? Question&Answers:os...

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

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134 views

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html - Tab Index on div

Please see the form HTML code below <form method="post" action="register"> <div class="email"> Email <input ... TAB when the cursor is at email input field? Question&Answers:os...

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

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1.3k views

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gradle - variantOutput.getPackageApplication() is obsolete

with Gradle 4.10.1 and the Android Gradle plugin updated to 3.3.0, I get the following warning: WARNING: ... warnings be avoided by migration to the new API? Question&Answers:os...

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

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489 views

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Using upper-case and lower-case xpath functions in selenium IDE

I am trying to get a xpath query using the xpath function lower-case or upper-case, but they seem to ... encountered this before? Does it make sense? Thanks. Question&Answers:os...

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

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254 views

1 answer

javascript - Page redirect with successful Ajax request

I have a form that uses Ajax for client-side verification. The end of the form is the following: $.ajax({ ... errors are present. Is this possible? Thanks! Amit Question&Answers:os...

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

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133 views

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sql - Constraint for only one record marked as default

How could I set a constraint on a table so that only one of the records has its isDefault bit field set to 1 ... default per set of rows, specified by a FormID. Question&Answers:os...

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

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311 views

1 answer

Get the background color of a button in android

How do i get the background color of a button. In the xml i set the background color using ---- android: ... how can i retrieve this value that it has ? Question&Answers:os...

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

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