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c# - GetFiles with multiple extensions

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

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javascript - HTML form action and onsubmit issues

I want to run JavaScript user validation on some textbox entries. The problem I'm having is that my form has the action ... -- And the submit button --> </form> Question&Answers:os...

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

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r - Named List To/From Data.Frame

I'm looking for a quick way to get back and forth between a list of the following format: $`a` [1] 1 2 3 ... , and another to convert it back to a data.frame. Question&Answers:os...

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

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math - Calculate date from week number in JavaScript

How can I calculate the date in JavaScript knowing the week number and the year? For week number 20 and year 2013 I want to ... */ this - d) / 8.64e + 7) } Question&Answers:os...

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

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java - Instantiating inner class

I working on a sample problem of over-ridding hashCode and equals method but getting an error: "No enclosing instance ... result; } private String name; } } Question&Answers:os...

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

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c# - Circular reference detected exception while serializing object to JSON

Just as mentioned in this post, I am getting a Json serialization error while serializing an Entity Framework ... SaveChanges(); } return purchaseOrder; } } Question&Answers:os...

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

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java - Finding the second highest number in array

I'm having difficulty to understand the logic behind the method to find the second highest number in array. ... == second_highest) second_highest = score[i]; Question&Answers:os...

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

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regex - Escaping a forward slash in a regular expression

My question is a simple one, and it is about regular expression escaping. Do you have to escape a forward slash / ... ? And how would you go about doing it? Question&Answers:os...

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

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Parse Web Site HTML with JAVA

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

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java - com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:Communications link failure

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

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c++ - What is the 'this' pointer?

I'm fairly new to C++, and I don't understand what the this pointer does in the following scenario: void ... function has no input, so what is this doing? Question&Answers:os...

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

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java - What would an AST (abstract syntax tree) for an object-oriented programming language look like?

I'm reading about AST (abstract syntax trees) but all the samples I see use expressions such as: a + ... of an actual programming language to learn more. Question&Answers:os...

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

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How do you escape strings for SQLite table/column names in Python?

The standard approach for using variable values in SQLite queries is the "question mark style", like this: import sqlite3 ... may be a quirk of the PHP library. Question&Answers:os...

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

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python - Maximum sum sublist?

I'm getting confused with this question at what it's trying to ask. Write function mssl() (minimum sum sublist) that ... res = sum(x) return res else: return 0 Question&Answers:os...

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

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Valid javascript object property names

I'm trying to work out what is considered valid for the property name of a javascript object. For example ... between a variable and an object property name? Question&Answers:os...

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

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javascript - for..in and hasOwnProperty

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

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unix - Why are ports below 1024 privileged?

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

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javascript - Understanding Asynchronous Code in Layman's terms

I understand the basic thing about asynchronous-ness: things don't execute sequentially. And I understand there is ... then the rest of the program async? Question&Answers:os...

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

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obfuscation - Obfuscate PHP code

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

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java - Retrofit Expected BEGIN_OBJECT but was BEGIN_ARRAY

I'm fairly new to JSON parsing, I'm using the Retrofit library of Square and ran into this problem. I'm ... BEGIN_ARRAY at line 1 column2 What is wrong here? Question&Answers:os...

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

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c++ - Will new return NULL in any case?

I know that according to C++ standard in case the new fails to allocate memory it is supposed to throw std ... every new statement makes code look very ugly. Question&Answers:os...

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

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caching - Android set up Volley to use from cache

I'm trying to create and use a cache for a server JSON response. For example: cache JSON objects to ... ; entry.responseHeaders = headers; return entry; } Question&Answers:os...

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

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php - "[notice] child pid XXXX exit signal Segmentation fault (11)" in apache error.log

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

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SQL standard to escape column names?

Is there a SQL standard to escape a column name? If not what works for MySQL and SQLite? does it also work for SQL Server? Question&Answers:os...

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

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objective c - Programmatically turn on bluetooth in the iphone sdk?

I have seen a lot of questions about this but no one actually gives a real answer (frameworks to import, actual code etc ... . (iPhone SDK 3.1.2, iPod touch 2g) Question&Answers:os...

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

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html - Colspan/Rowspan for elements whose display is set to table-cell

I have the following code: <div class="table"> <div class="row"> <div class="cell">Cell</div> < ... of colspan) for elements with display: table-cell? Question&Answers:os...

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

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c# - String Concatenation using '+' operator

Looking at the string class metadata, I only see the operators == and != overloaded. So how is it ... http://www.joelonsoftware.com/articles/fog0000000319.html) Question&Answers:os...

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

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javascript - Browser Timeouts

Do browsers have built in timeouts and if so what are they? I have a page that does an AJAX call on a process ... didn't know if there was any truth to that. Question&Answers:os...

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

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