本文整理汇总了C#中Stack.IsNotEmpty方法的典型用法代码示例。如果您正苦于以下问题：C# Stack.IsNotEmpty方法的具体用法？C# Stack.IsNotEmpty怎么用？C# Stack.IsNotEmpty使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Stack的用法示例。
在下文中一共展示了Stack.IsNotEmpty方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Parse
/// <summary>
/// Parses formula
/// </summary>
/// <param name="text">The formula's text.</param>
/// <returns></returns>
private List<Token> Parse(string text)
{
var token = new StringBuilder();
var stack = new Stack<OperatorToken>();
var output = new List<Token>();
var negationPossible = true;//true if next minus means negation
var openedBrackets = 0;
for (int i = 0; i < text.Length; i++)
{
if (char.IsDigit(text[i])
|| text[i].ToString(Thread.CurrentThread.CurrentCulture) == Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator)
{
token.Clear();
token.Append(text[i]);
while (text.Length >= i + 2 && (char.IsDigit(text[i + 1])
|| text[i + 1].ToString(Thread.CurrentThread.CurrentCulture) == Thread.CurrentThread.CurrentCulture.NumberFormat.NumberDecimalSeparator))
{
token.Append(text[i + 1]);
++i;
}
output.Add(new NumberToken(double.Parse(token.ToString())));
negationPossible = false;
}
else if (text[i] == '+')
{
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.Plus));
negationPossible = true;
}
else if (text[i] == '-')
{
if (negationPossible)
{
output.Add(new NegationToken());
negationPossible = false;
}
else
{
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.Minus));
}
}
else if (text[i] == '*')
{
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.Mult));
negationPossible = true;
}
else if (text[i] == '/')
{
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.Div));
negationPossible = true;
}
else if (text[i] == '(')
{
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.LeftBraket));
negationPossible = true;
openedBrackets++;
}
else if (text[i] == ')')
{
openedBrackets--;
if (openedBrackets < 0)
return null;
AddOperatorToStack(stack, output, new OperatorToken(OperatorType.RightBraket));
negationPossible = false;
}
else if (char.IsLetter(text[i]))
{
token.Clear();
token.Append(text[i]);
while (text.Length >= i + 2 && char.IsLetter(text[i + 1]))
{
token.Append(text[i + 1]);
++i;
}
output.Add(new VariableToken(token.ToString()));
negationPossible = false;
}
else if (char.IsWhiteSpace(text[i]))
continue;
else // unknown symbol in formula
return null;
}
//clear stack from operators
while (stack.IsNotEmpty())
output.Add(stack.Pop());
//left and right brackets count must be equal
if (openedBrackets != 0)
return null;
//in order to evaluate reverse polish notation it must be exactly one more literal than operator
//.........这里部分代码省略.........
示例2: GetRecoverMessageFiles
private IEnumerable<MessageFile> GetRecoverMessageFiles(long beginMessageOffset)
{
if (beginMessageOffset == 0L)
{
_logger.Info("The database does not has any messages, try to recover all the messages from all the local message log files.");
}
var stack = new Stack<MessageFile>();
var messageFiles = new List<MessageFile>();
var fileName = _setting.MessageLogFile;
if (!new FileInfo(fileName).Exists)
{
_logger.InfoFormat("Message log file not exist, fileName: {0}", fileName);
return messageFiles;
}
var index = 0;
var message = GetFirstLineMessage(fileName);
var currentFileName = fileName;
while (message != null)
{
stack.Push(new MessageFile(_logger, _jsonSerializer, currentFileName));
if (message.MessageOffset <= beginMessageOffset)
{
break;
}
index++;
currentFileName = fileName + "." + index;
if (!new FileInfo(currentFileName).Exists)
{
if (beginMessageOffset > 0L)
{
_logger.ErrorFormat("Message log file not exist, messages offset from [{0}] to [{1}] will not be recovered. fileName: {2}", beginMessageOffset, message.MessageOffset - 1, currentFileName);
}
break;
}
message = GetFirstLineMessage(currentFileName);
}
while (stack.IsNotEmpty())
{
messageFiles.Add(stack.Pop());
}
return messageFiles;
}