问题标签 [dimensional]

I want to find a programmatic solution using C++.

I have a 900 files each of 27MB size. (just to inform about the enormity ).

Each file has 55K rows and Varying columns. But the header indicates the columns

I want to sort the rows in an order w.r.t to a Column Value.

I wrote the sorting algorithm for this (definitely my newbie attempts, you may say). This algorithm is working for few numbers, but fails for larger numbers.

Here is the code for the same: basic functions I defined to use inside the main code:

Now the main code:

can some one suggest me a better way of doing this? why it is failing for larger values. ?

The primary function of interest for this query is Sort2D function.

thanks for the time and patience.

prasad.

我有一个问题，我需要创建二维表，该表将由字符串索引，例如：

或锯齿状：

如何声明可以处理此问题的 Collection 或数组？我找到了解决方案，但我不确定它是否是最好的。

但是当我想创建一个新值时，我需要初始化新字典，所以为什么我认为该解决方案不是最正确的：

那么如何以最好的方式创建由字符串索引的二维数组（也许创建可以处理这个的新类）？

与二维奇偶校验相比，CRC 有什么优势吗？

我有一个返回一维数组的函数，如下所示：

Public Function KeyConvert([args]) As Byte()

和一个二维数组：

可以看作是 15 行，每一行是一个 5 元素的数组，我们都已经知道了。

现在我想调用该函数并将结果（这是一个一维数组）分配给 KeyList 数组中的一行（比如第 4 行）。起初我认为代码应该是这样的

但这没有用。我找不到引用该特定行的方法。

所以有人有任何想法吗？非常感谢

假设我们想要清晰而不是速度。渲染 n 维形状（如超立方体）的最佳方法是什么。我已经玩了几个小时了，但我错过了一些东西。我通常使用 3d 到 2d 的标准方法，但我坚持使用 5d 到 2d。

说得通？

我有一个 49 空间一维数组声明为int boardArray [49];，我也有一个二维 7x7 数组声明为int boardArrayTwo [7][7]'我试图使用嵌套的 for 循环将一维数组扔到二维数组中这是我用来测试它的代码.

我尝试运行它，但没有任何反应。我做错了吗？

我在 C# 中有一个二维字符串数组，我需要将该数组在一维中向左移动我怎样才能有效地做到这一点

我不想使用嵌套的 for 并且我想要 O(n) 而不是 O(n ² )中的算法

我想在 Javascript 中创建一个包含一个或多个二维数组的对象。

我尝试了以下方式（在这个例子中我只尝试添加一个二维数组）：

信息：
- 这给了我一个奇怪的错误“缺少：属性 id 之后”，这似乎没有多大意义
- 不幸的是，到目前为止，我没有找到显示如何使用谷歌执行此操作的示例
- 如果我不添加字段[0] ...用于创建第二个有效的数组。
- 将 XSIZE 和 YSIZE 更改为像 new Array(8)... 这样的数字不起作用。

如果有人能告诉我如何做或解释为什么我根本不能这样做并且需要使用其他方法，我将非常感激。

非常感谢！

我正在尝试在数组（多维数组）中输出带有 ist 的数组的数组字段。似乎 .length 在第二个数组中不起作用。

感谢帮助！

干杯，托尼

I'm a novice coder, just a few months into learning C++. This is my second question on Stack Overflow, and I really hope that the answers will benefit me and others.

I started working on this program because I wanted to create a vector engine that could create a 1D vector, assign a value to any position in that 1D vector (by abstracting width and height to simulate 2D), and then print out said vector. The end goal of a project like this would be to later have a rendering engine that would convert the int values in this vector to image tiles on the screen using SDL or equivalent.

I previously made a program that could do something similar using a vector of objects each containing a character, but I didn't pass values by reference, so I really wanted to nail passing values by reference in this program.

The code compiles just fine, and the cout statements in the assignToVector function seem to indicate that the value is being assigned properly. But when I call the final print statement, the value that I want to pass into the vector is not properly outputted. I'm using vector.erase to clear the position before assigning a value to it, and vector.assign to input the value, if that helps narrow down the problem.

I really appreciate the time anyone spends answering this question! Thank you!

EDIT: The suggestion made by chris below fixed the first part of the problem (change std::cout << printerVector[*it] TO std::cout << *it).

However I find I needed to add a position--; after I create it in order to align the value properly. Basically, the inputted width and height values don't match their actual position on the grid. Any further help on this would be appreciated! I think it's an issue related to one dimensional vectors and using them as 2D.