从数组或列表中获取最小值和最大值< keyvaluepair> [英] Getting min and max from an array or list <keyvaluepair>
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问题描述
我有一个基本上是键/值对的多维数组。我想根据键求和所有值，然后从中选择最小值和最大值。
我尝试制作一个List< keyvaluepair>和一个字典做到这一点我非常接近，但它不会让我排序双打。我的列表和数组是正确创建的，没有问题。我想显示值的最小值/最大值，并在同一行显示键
public 静态 void PrintTable（）
{
字符串文本;
var totals = new 列表< KeyValuePair< string，double>>（）;
for （ int i = 0 ; i < topics.Length; i ++）
{
Console.Write（topics [i] + ）;
double num = 0 ;
for （ int j = 0 ; j < 10 ; j ++）
{
Console.Write （respon [i，j] + ）;
num + = answers [i，j] *（j + 1 ）;
totals.Add（ new KeyValuePair< string，double>（topics [i]，num））;
}
average = num / userCounter;
Console.Write（ \t + average.ToString（ ##。00））;
}
// 显示最高点和最低点。
var addedSums = totals.GroupBy（k = > k.Key）.ToDictionary（a = > a.Key，b = > b.Sum（c = > c.Value））;
foreach （ var 对 addedSums.Values.OrderByDescending（））
{
Console.WriteLine（ 最高分： + pair）;
}
我的尝试：
使用数组/列表/元组/ dictionarie / keyvaluepairs以及更多linq和许多其他方法来尝试这个我认为它会很简单
解决方案
列表< KeyValuePair< string，double>> totals = new List< KeyValuePair< string，double>>（）
{
new KeyValuePair< string，double>（Key1，10），
new KeyValuePair< string，double> （Key2，15），
new KeyValuePair< string，double>（Key3，5），
new KeyValuePair< string，double>（Key4，13）
} ;
double min = 0; double max = 0;
string maxKey =，minKey =;
foreach（KeyValuePair< string，double> kvp in totals）
{
if（max< kvp.Value）
{
maxKey = kvp.Key;
max = kvp.Value;
}
}
min = max;
foreach（KeyValuePair< string，double> kvp in totals）
{
if（min> kvp.Value）
{
minKey = kvp.Key;
min = kvp.Value;
}
}
textBox1.Text + = string.Format（maxKey：{0} max：{1} minkey：{2} min：{3} \ n，maxKey ，max，minKey，min）;
**注意：我已将输出写入文本框而不是控制台
如果发现有用，请标记答案。
您好，
只需更新以下代码即可。在这里检查非零值。 [来自前一代码中的第18行]
列表< KeyValuePair< string，double>> totals = new List< KeyValuePair< string，double>>（）
{
new KeyValuePair< string，double>（Key1，10），
new KeyValuePair< string，double>（Key3，0），
new KeyValuePair< string，double>（Key2，15），
new KeyValuePair< string，double>（Key4，13），
new KeyValuePair< string，double>（Key5，3）
};
double min = 0; double max = 0;
string maxKey =，minKey =;
foreach（KeyValuePair< string，double> kvp in totals）
{
//textBox1.Text + = string.Format（Key：{0} Value：{1} \ n ，kvp.Key，kvp.Value）;
if（max< kvp.Value）
{
maxKey = kvp.Key;
max = kvp.Value;
}
}
min = max;
foreach（KeyValuePair< string，double> kvp in totals）
{
if（kvp.Value！= 0）//(kvp.Value> 0）
{
if（min> kvp.Value）
{
minKey = kvp.Key;
min = kvp.Value;
}
}
}
textBox1.Text + = string.Format（maxKey：{0} max：{1} minkey：{2} min：{3} \\ \\ n，maxKey，max，minKey，min）;
>
**注意：如果发现有用，请标记为答案。
I have a multidimensional array with basically a key / value pair. I would like to sum all the values according to the key then pick the min and max values from this.
I tried making a List<keyvaluepair> and a dictionary to do this I got very close but it wouldn’t let me sort through a list of doubles. My lists and arrays are created correctly without issues. I would like to display the min/max of value and also display the key in the same line
public static void PrintTable()
{
string text;
var totals = new List<KeyValuePair<string, double>>();
for(int i = 0; i < topics.Length; i++)
{
Console.Write(topics[i] + " ");
double num = 0;
for(int j = 0; j < 10; j++)
{
Console.Write(responses[i, j] + " ");
num += responses[i, j] * (j + 1);
totals.Add(new KeyValuePair<string, double>( topics[i], num));
}
average = num / userCounter;
Console.Write("\t" + average.ToString("##.00"));
}
// Display highest points and lowest points.
var addedSums = totals.GroupBy(k => k.Key).ToDictionary(a => a.Key, b => b.Sum(c => c.Value));
foreach(var pair in addedSums.Values.OrderByDescending())
{
Console.WriteLine("Highest points: " + pair);
}
What I have tried:
using arrays/lists/tuples/dictionarie/keyvaluepairs and more linq and many other ways to try this i thought it would of been simple
解决方案
List<KeyValuePair<string, double>> totals = new List<KeyValuePair<string, double>>() { new KeyValuePair<string, double>("Key1", 10), new KeyValuePair<string, double>("Key2", 15), new KeyValuePair<string, double>("Key3", 5), new KeyValuePair<string, double>("Key4", 13) }; double min = 0; double max = 0; string maxKey = "", minKey = ""; foreach (KeyValuePair<string, double> kvp in totals) { if (max < kvp.Value) { maxKey = kvp.Key; max = kvp.Value; } } min = max; foreach (KeyValuePair<string, double> kvp in totals) { if (min > kvp.Value) { minKey = kvp.Key; min = kvp.Value; } } textBox1.Text += string.Format("maxKey:{0} max: {1} minkey:{2} min: {3} \n", maxKey, max, minKey, min);
**Note: I have written output to textbox instead of Console
Mark answer if found useful.
Hi,
just update below code. cheking for non zero value here. [from line num 18 in previouse code]
List<KeyValuePair<string, double>> totals = new List<KeyValuePair<string, double>>() { new KeyValuePair<string, double>("Key1", 10), new KeyValuePair<string, double>("Key3", 0), new KeyValuePair<string, double>("Key2", 15), new KeyValuePair<string, double>("Key4", 13), new KeyValuePair<string, double>("Key5",3) }; double min = 0; double max = 0; string maxKey = "", minKey = ""; foreach (KeyValuePair<string, double> kvp in totals) { //textBox1.Text +=string.Format("Key: {0} Value: {1} \n", kvp.Key, kvp.Value); if (max < kvp.Value) { maxKey = kvp.Key; max = kvp.Value; } } min = max; foreach (KeyValuePair<string, double> kvp in totals) { if (kvp.Value != 0) //(kvp.Value > 0) { if (min > kvp.Value) { minKey = kvp.Key; min = kvp.Value; } } } textBox1.Text += string.Format("maxKey:{0} max: {1} minkey:{2} min: {3} \n", maxKey, max, minKey, min);>
**Note: Mark as Answer if found useful.
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