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audio - How to retrieve duration of MP3 in .NET?

I have build a WPF application where users can drag and drop MP3 files onto a listbox. I need a way to ... Or is it possible using only the .NET framework? Question&Answers:os...

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

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c - sqrt from math.h causes linker error "undefined reference to sqrt" only when the argument is not a constant

I created a small program, as follows: #include <math.h> #include <stdio.h> #include <unistd.h> int ... MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ Question&Answers:os...

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

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r - How to move cells with a value row-wise to the left in a dataframe

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

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c# - Fading in/out GameObject

I'm fairly new to coding, I'm still trying to develop that logic of thinking to help me create the solutions I' ... <SpriteRenderer> ().enabled = false; } } } Question&Answers:os...

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

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node.js - javascript - Why is there a spec for sync and async modules?

I have just finished reading this article on Javascript modules. I can understand that CommonJS modules are ... someone help me with this confusion ? Question&Answers:os...

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

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Why might Python's `from` form of an import statement bind a module name?

I have a Python project with the following structure: testapp/ ├── __init__.py ├── api │?? ├── __init__.py │?? ... but I'm not certain. What is happening here? Question&Answers:os...

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

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c - Why does strcmp() return 0 when its inputs are equal?

When I make a call to the C string compare function like this: strcmp("time","time") It returns 0, which ... curious to the reasons I am seeing this behavior. Question&Answers:os...

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

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php - How to prevent PDO from interpreting a question mark as a placeholder?

For detecting the existence of a key in a hstore, I need to run a query like this: SELECT * FROM tbl ... to persuade PDO to leave the question mark alone. Question&Answers:os...

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

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Why JavaScript function declaration (and expression)?

I've seen others using the following pattern. var bar = function foo(){}; console.log(bar); // foo() console. ... declared, but they're not. Why is the reason? Question&Answers:os...

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

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java - Why do I get "non-static variable this cannot be referenced from a static context"?

I have a very simple class which I want to use as a subclass of another one. But when I put its code in the ... ; x.newFunction(); } } Why is this happening ? Question&Answers:os...

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

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mysql - count(*) and count(column_name), what's the diff?

count(*) and count(column_name), what's the difference in mysql. Question&Answers:os...

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

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Array initialization differences java

What is the difference between the two following methods of array initialization: Object[] oArr = new Object[] ... it related to heap/stack allocation? Thanks! Question&Answers:os...

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

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431 views

1 answer

regex - PHP remove special character from string

I have problems with removing special characters. I want to remove all special characters except "( ) / . % - &", because I' ... a-zA-Z0-9_ -]/s', '', $String); Question&Answers:os...

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

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javascript - Detect Close windows event by jQuery

Could you please give me the best way to detect only window close event for all browsers by jQuery? I mean ... threads but have not found the right way yet. Question&Answers:os...

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

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C++ How to detect Windows 10

I have written a PC auditing tool many years ago and have been keeping it up to date. One of basic ... users. Any other suggestions/thoughts are most welcome! Question&Answers:os...

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

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930 views

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different result for yyyy-mm-dd and yyyy/mm/dd in javascript when passed to "new Date"

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

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107 views

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html - How send a form with Javascript when input name is "submit"?

Question: How can you send a form with Javascript if one form input has the name submit? Background: I am ... not a function. Similar error message in Safari. Question&Answers:os...

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

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245 views

1 answer

Using VBA code, how to export Excel worksheets as image in Excel 2003?

Please suggest the better way of exporting range of data from excel worksheets as image either in .jpeg or .png or in .gif. Question&Answers:os...

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

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278 views

1 answer

Echo a multidimensional array in PHP

I have a multidimensional array and I'm trying to find out how to simply "echo" the elements of the array. The depth ... parent comment [child] => Array ( ) ) ) Question&Answers:os...

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

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452 views

1 answer

excel - How to insert an embedded picture?

xlApp.activesheet.Pictures.Insert(strImagePath) inserts pictures into a spreadsheet as a linked picture. If I send ... am also calling this method from Access. Question&Answers:os...

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

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327 views

1 answer

css - Html Select box options on Hover?

I've seen this very simple selectbox on youtube, where the select options are visible on hover (instead of clicking) ... value="large">Large</option> </select> 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

c++ - How to include OpenSSL in Visual Studio

I am having a hard time trying to add openssl to my project. I have downloaded the precompiled installer for ... but it's not restricted to that environment. Question&Answers:os...

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

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75 views

1 answer

Output raw XML using php

I want to output raw xml in a manner similar to http://www.google.com/ig/api?weather=Mountain+View but ... find a tutorial for anything THIS simple. Thanks Question&Answers:os...

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

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230 views

1 answer

c - POSIX API call to list all the pthreads running in a process

I have a multi-threaded application in a POSIX/Linux environment - I have no control over the code that creates ... to list all the pthreads running in process. Question&Answers:os...

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

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93 views

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java - Is calling static methods via an object "bad form"? Why?

In a recent question, someone asked about static methods and one of the answers stated that you generally call them ... not the issue I'm asking about here. 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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ms access - SQL Updating from an inner join

I'm using microsoft Access. If this query: (SELECT FERMENT.FermentId FROM FERMENT INNER JOIN [BELGIUM BEER] ON ... .FermentId ORDER BY [BELGIUM BEER].BeerId) a Question&Answers:os...

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

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117 views

1 answer

Why main() method is needed in java main class

I know we can compile and run a java program successfully without a main() method, but why we still need main() method in java's main class? Question&Answers:os...

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

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152 views

1 answer

c++ - Why do compilers allow string literals not to be const?

And where are literals in memory exactly? (see examples below) I cannot modify a literal, so it would supposedly be a const ... ? It displays 'a' on VC++2010 */ Question&Answers:os...

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

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