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Python add item to the tuple
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>>> x = (u'2',)
>>> x += u"random string"
Traceback (most recent call last):
File "<pyshell#11>", line 1, in <module>
x += u"random string"
TypeError: can only concatenate tuple (not "unicode") to tuple
>>> x += (u"random string", ...
Regular vs Context Free Grammars
...re's an analogous pumping lemma for context-free languages that breaks the strings in the language into five parts, uvxyz, and where all instances of the language are in uvixyiz, for i ≥ 0. Now, you have two "nonterminals" that can be replicated, or pumped, as long as you have the same number.
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Why is typeof null “object”?
...hat the five types of primitives are: undefined, null, boolean, number and string.
8 Answers
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GetType() can lie?
...ceFoo();
Console.WriteLine("BadFoo says he's a '{0}'", badFoo.GetType().ToString());
Console.WriteLine("NiceFoo says he's a '{0}'", niceFoo.GetType().ToString());
Console.WriteLine("BadFoo really is a '{0}'", typeof(BadFoo));
Console.WriteLine("NiceFoo really is a '{0}'", typeof(NiceFoo));
Console...
right click context menu for datagridview
...ntMouseOverRow >= 0)
{
m.MenuItems.Add(new MenuItem(string.Format("Do something to row {0}", currentMouseOverRow.ToString())));
}
m.Show(dataGridView1, new Point(e.X, e.Y));
}
}
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Is there any advantage of using map over unordered_map in case of trivial keys?
...(1) vs. O(log n) ). Most times I use a map, I use either int or std::string as the key type; hence, I've got no problems with the definition of the hash function. The more I thought about it, the more I came to realize that I can't find any reason of using a std::map over a std::unordered_...
Converting a Date object to a calendar object [duplicate]
...er = new SimpleDateFormat("yyyyMMdd");
date = (Date)formatter.parse(date.toString());
DateFormat is used to convert Strings to Dates (parse()) or Dates to Strings (format()). You are using it to parse the String representation of a Date back to a Date. This can't be right, can it?
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Best way to resolve file path too long exception
... For example, the maximum path on drive D is "D:\some
256-character path string<NUL>" where "<NUL>" represents the invisible
terminating null character for the current system codepage. (The
characters < > are used here for visual clarity and cannot be part of
a valid path s...
Can my enums have friendly names? [duplicate]
... easy to get the description for a given value of the enum:
public static string GetDescription(this Enum value)
{
Type type = value.GetType();
string name = Enum.GetName(type, value);
if (name != null)
{
FieldInfo field = type.GetField(name);
if (field != null)
...
How to add a progress bar to a shell script?
... order to accomplish the same thing you need to put \r\c at the end of the string, instead of just \r
– Justin Jenkins
Apr 2 '12 at 1:17
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