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python - Sort a list by multiple attributes?

I have a list of lists: [[12, 'tall', 'blue', 1], [2, 'short', 'red', 9], [4, 'tall', 'blue' ... sort twice, once for each element, but is there a quicker way? Question&Answers:os...

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

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c# - How to convert a column number (e.g. 127) into an Excel column (e.g. AA)

How do you convert a numerical number to an Excel column name in C# without using automation getting the value directly from ... names, e.g. A, AA, AAA etc. Question&Answers:os...

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

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c# - Combining two expressions (Expression<Func<T, bool>>)

I have two expressions of type Expression<Func<T, bool>> and I want to take to OR, AND or NOT of these ... <Func<T, bool>> andExpression = expr AND expr2 Question&Answers:os...

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

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hta - Take a screenshot of a webpage with JavaScript?

Is it possible to to take a screenshot of a webpage with JavaScript and then submit that back to the server? I' ... would be for HTA. But is it possible? Question&Answers:os...

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

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Pointer arithmetic for void pointer in C

When a pointer to a particular type (say int, char, float, ..) is incremented, its value is increased by the ... know to add x to value of the pointer? Question&Answers:os...

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

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How to pass 2D array (matrix) in a function in C?

I need to do this to persist operations on the matrix as well. Does that mean that it needs to be ... suffice? void operate_on_matrix(char matrix[][20]); Question&Answers:os...

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

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c++ - What platforms have something other than 8-bit char?

Every now and then, someone on SO points out that char (aka 'byte') isn't necessarily 8 bits. It seems ... really get much experience with C on that platform.) Question&Answers:os...

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

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macos - How to install Xcode Command Line Tools

How do I get the command-line build tools installed with the current Xcode/Mac OS X v10.8 (Mountain ... environment to support building from the command line? Question&Answers:os...

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

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How to read an external local JSON file in JavaScript?

I have saved a JSON file in my local system and created a JavaScript file in order to read the JSON file and ... the JSON file and print the data in JavaScript? Question&Answers:os...

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

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javascript - Loading local JSON file

I'm trying to load a local JSON file but it won't work. Here is my JavaScript code (using jQuery): var json ... I can access data. Does anyone have a solution? Question&Answers:os...

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

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android - Focusable EditText inside ListView

I've spent about 6 hours on this so far, and been hitting nothing but roadblocks. The general premise is ... items that contain focusable children. Any takers? Question&Answers:os...

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

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python - How to deep copy a list?

I have some problem with a List copy: So After I got E0 from 'get_edge', I make a copy of E0 by calling ' ... %min(results) print E0[1:10] ## this is print2 Question&Answers:os...

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

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javascript - Can you bind 'this' in an arrow function?

I've been experimenting with ES6 for a while now, and I've just come to a slight problem. I really like using ... and Firefox 43, and the result is the same. Question&Answers:os...

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

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Multiple assignment and evaluation order in Python

What is the difference between the following Python expressions: # First: x,y = y,x+y # Second: x = y y = x+y First ... >>> y 4 y is 3 in First and 4 in Second Question&Answers:os...

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

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ms access - Combine values from related rows into a single concatenated string value

I'm trying to aggregate some instructor data (to easily show which courses an instructor taught in a semester), and up ... SQL selects or will I need to use VB? Question&Answers:os...

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

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python - Permanently add a directory to PYTHONPATH?

Whenever I use sys.path.append, the new directory will be added. However, once I close python, the list ... do I permanently add a directory to PYTHONPATH? Question&Answers:os...

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

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What do single quotes do in C++ when used on multiple characters?

I'm curious about this code: cout << 'test'; // Note the single quotes. gives me an output of 1952805748. ... : Is the output an address in memory or something? Question&Answers:os...

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

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overriding - How to override equals method in Java

I am trying to override equals method in Java. I have a class People which basically has 2 data fields name ... operator as suggested and my problem is solved. Question&Answers:os...

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

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556 views

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inline styles - What's so bad about in-line CSS?

When I see website starter code and examples, the CSS is always in a separate file, named something like "main.css" ... src="myimage.gif" style="float:right" /> Question&Answers:os...

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

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comparison - Javascript: The prettiest way to compare one value against multiple values

This question already has answers here: Question&Answers:os...

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

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java - What's the difference between Instant and LocalDateTime?

I know that: Instant is rather a "technical" timestamp representation (nanoseconds) for computing. ... LocalDateTime regarding precision and time-zone Question&Answers:os...

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

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python - How to check if a string is a substring of items in a list of strings?

I have a list: my_list = ['abc-123', 'def-456', 'ghi-789', 'abc-456'] and want to search for items that ... . So how can I get all items that contain 'abc'? Question&Answers:os...

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

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c - Why does mulss take only 3 cycles on Haswell, different from Agner's instruction tables? (Unrolling FP loops with multiple accumulators)

I'm a newbie at instruction optimization. I did a simple analysis on a simple function dotp which is used to get the dot ... add rax, 4 cmp rdx, rax jne .L3 ret Question&Answers:os...

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

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Node.js + Nginx - What now?

I've set up Node.js and Nginx on my server. Now I want to use it, but, before I start there are 2 questions ... s not clear for me how to use Node.js correctly. Question&Answers:os...

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

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c# - Identify if a string is a number

If I have these strings: "abc" = false "123" = true "ab2" = false Is there a command, like IsNumeric() or ... , that can identify if a string is a valid number? Question&Answers:os...

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

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Java Timer vs ExecutorService?

I have code where I schedule a task using java.util.Timer. I was looking around and saw ExecutorService ... issues which the ExecutorService solved for them. Question&Answers:os...

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

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251 views

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c# - Public Fields versus Automatic Properties

We're often told we should protect encapsulation by making getter and setter methods (properties in C#) for class ... public class Book { public string Title; } Question&Answers:os...

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

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432 views

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javascript - How to stop event propagation with inline onclick attribute?

Consider the following: <div onclick="alert('you clicked the header')" class="header"> <span onclick="alert('you ... it does not fire the div's click event? Question&Answers:os...

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

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