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Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...后，你会发现解释器居然不到200k，这是多么地变态啊（/bin/sh都要1M，MacOS平台），而且能和C语言非常好的互动。我很好奇得浏览了一下Lua解释器的源码，这可能是我看过最干净的C的源码了。我不想写一篇大而全的语言手册，一...
What is an undefined reference/unresolved external symbol error and how do I fix it?
What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them?
34 Answ...
pandas: How do I split text in a column into multiple rows?
...file and the next to last column has a string of text that I want to split by a specific delimiter. I was wondering if there is a simple way to do this using pandas or python?
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How to add an object to an array
How can I add an object to an array (in javascript or jquery)?
For example, what is the problem with this code?
13 Answ...
Javascript array search and remove string?
...pdating this thread with a more recent 1-line solution:
let arr = ['A', 'B', 'C'];
arr = arr.filter(e => e !== 'B'); // will return ['A', 'C']
The idea is basically to filter the array by selecting all elements different to the element you want to remove.
Note: will remove all occurrences. ...
What is the difference between a string and a byte string?
I am working with a library which returns a byte string and I need to convert this to a string.
7 Answers
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Why Would I Ever Need to Use C# Nested Classes [duplicate]
I'm trying to understand about nested classes in C#. I understand that a nested class is a class that is defined within another class, what I don't get is why I would ever need to do this.
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I want to get the type of a variable at runtime
I want to get the type of a variable at runtime.
How do I do this?
4 Answers
4
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Swapping two variable value without using third variable
... y have different memory locations (rather than different values). This is because (p xor p) = 0 and if both x and y share the same memory location, when one is set to 0, both are set to 0.
When both *x and *y are 0, all other xor operations on *x and *y will equal 0 (as they are the same), which me...
Why does string::compare return an int?
...er than 0, not necessarily -1 or 1.
Secondly, return values are rvalues, subject to integral
promotion, so there's no point in returning anything smaller.
In C++ (as in C), every expression is either an rvalue or an
lvalue. Historically, the terms refer to the fact that lvalues
appear on the left...