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How to convert a number to string and vice versa in C++

Since this question gets asked about every week, this FAQ might help a lot of users. How to convert an integer to ... a string to a floating-point number in C++ Question&Answers:os...

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

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java - Inner class can access but not update values - AsyncTask

I am trying to unzip a folder using Android's AsyncTask. The class (called Decompress) is an inner class of ... thread will be lost once that thread returns? Question&Answers:os...

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

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javascript - Using Node.js require vs. ES6 import/export

In a project I'm collaborating on, we have two choices on which module system we can use: Importing modules using ... we were to use ES6 modules over Node ones? Question&Answers:os...

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

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ssh - Git: How to solve Permission denied (publickey) error when using Git?

I'm on Mac Snow Leopard and I just installed git. I just tried git clone [email protected]:cakebook.git but ... -keygen with no passphase but still same error. Question&Answers:os...

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

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anaconda - Conda environments not showing up in Jupyter Notebook

I installed Anaconda (with Python 2.7), and installed Tensorflow in an environment called tensorflow. I can import ... was told that ipykernel was not found.) Question&Answers:os...

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

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javascript - Where does npm install packages?

Can someone tell me where can I find the Node.js modules, which I installed using npm? Question&Answers:os...

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

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python - How can I check for NaN values?

float('nan') results in Nan (not a number). But how do I check for it? Should be very easy, but I cannot find it. Question&Answers:os...

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

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c# - How do you sort a dictionary by value?

I often have to sort a dictionary, consisting of keys & values, by value. For example, I have a hash of words ... a custom class, but is there a cleaner way? Question&Answers:os...

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

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Simplest way to read JSON from a URL in Java

This might be a dumb question but what is the simplest way to read and parse JSON from URL in Java? In Groovy, it ... to do is to read the content of this link. Question&Answers:os...

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

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javascript - ArrayBuffer to base64 encoded string

I need an efficient (read native) way to convert an ArrayBuffer to a base64 string which needs to be used on a multipart post. Question&Answers:os...

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

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html - Using relative URL in CSS file, what location is it relative to?

When defining something like a background image URL in a CSS file, when using a relative URL, where is it ... index.html /about/extra/other.html /index.html Question&Answers:os...

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

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asp classic - Detailed 500 error message, ASP + IIS 7.5

IIS 7.5 , 2008rc2, classic asp, 500 error msg: The page cannot be displayed because an internal server error has ... But that didn't work. Can anyone help me? Question&Answers:os...

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

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Read/Write 'Extended' file properties (C#)

I'm trying to find out how to read/write to the extended file properties in C# e.g. Comment, Bit Rate, Date ... reading/writing to video files (AVI/DIVX/...) Question&Answers:os...

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

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java - Why is volatile used in double checked locking

From Head First design patterns book, the singleton pattern with double checked locking has been implemented as ... double checked locking i.e performance? Question&Answers:os...

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

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regex - Why in Java 8 split sometimes removes empty strings at start of result array?

Before Java 8 when we split on empty string like String[] tokens = "abc".split(""); split mechanism would split ... How rules of split have changed in Java 8? Question&Answers:os...

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

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Can you split/explode a field in a MySQL query?

I have to create a report on some student completions. The students each belong to one client. Here are the tables ( ... c.`courseNames`)[e.`courseId`] FROM ... Question&Answers:os...

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

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814 views

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mysql - Authentication plugin 'caching_sha2_password' cannot be loaded

I am connecting MySQL - 8.0 with MySQL Workbench and getting the below error: Authentication plugin 'caching_sha2_password ... as well. Any solution for this? Question&Answers:os...

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

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518 views

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jakarta ee - Replacements for deprecated JPMS modules with Java EE APIs

Java 9 deprecated six modules that contain Java EE APIs and they are going to be removed soon: java.activation with ... 't see much risk for opinion and spam. Question&Answers:os...

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

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100 views

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c# - Difference between new and override

Wondering what the difference is between the following: Case 1: Base Class public void DoIt(); Case 1: Inherited ... Is there a difference, or a preferred way? Question&Answers:os...

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

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218 views

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Understanding repr( ) function in Python

repr(): evaluatable string representation of an object (can "eval()" it, meaning it is a string representation that ... '") and not x which is the object? Question&Answers:os...

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

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169 views

1 answer

Proper way to make HTML nested list?

The W3 docs have a nested list example prefixed by DEPRECATED EXAMPLE:, but they never corrected it with a non-deprecated ... <li>Final list item</li> </ul> Question&Answers:os...

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

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192 views

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mysql - Split value from one field to two

I've got a table field membername which contains both the last name and the first name of users. Is it possible ... " (without quotes and a space in between). Question&Answers:os...

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

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88 views

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javascript - How to validate a date?

I'm trying to test to make sure a date is valid in the sense that if someone enters 2/30/2011 then it should be wrong. How can I do this with any date? Question&Answers:os...

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

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166 views

1 answer

Send HTML in email via PHP

How can I send an HTML-formatted email with pictures using PHP? I want to have a page with some settings and HTML ... is to attach files. How can I do that? Question&Answers:os...

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

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272 views

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javascript - Suppress Chrome 'Failed to load resource' messages in console

I'm writing a script that uses an XMLHttpRequest to search for a file defined by a relative path, by ... there any way to suppress these messages? Thanks Question&Answers:os...

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

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171 views

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windows installer - Why is it a good idea to limit the use of custom actions in my WiX / MSI setups?

Why is it a good idea to limit the use of custom actions in my WiX / MSI setups? Deployment is a crucial ... design flaws in my WiX / MSI deployment solution?. Question&Answers:os...

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

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318 views

1 answer

sql server - What is the difference between varchar and nvarchar?

Is it just that nvarchar supports multibyte characters? If that is the case, is there really any point, other than storage concerns, to using varchars? Question&Answers:os...

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

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241 views

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Python list of dictionaries search

Assume I have this: [ {"name": "Tom", "age": 10}, {"name": "Mark", "age": 5}, {"name": "Pam", "age" ... dictionary: {name: "Pam", age: 7} How to achieve this ? Question&Answers:os...

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

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