Take, Skip, TakeWhile, SkipWhile
Take method
returns a specified number of elements from the start of the collection. The
number of items to return is specified using the count parameter this method
expects.
Skip method skips a specified number of elements in a collection and then returns the remaining elements. The number of items to skip is specified using the count parameter this method expects.
Please Note: For the same argument value, the Skip method returns all of the items that the Take method would not return.
TakeWhile method returns elements from a collection as long as the given condition specified by the predicate is true.
SkipWhile method skips elements in a collection as long as the given condition specified by the predicate is true, and then returns the remaining elements.
Skip method skips a specified number of elements in a collection and then returns the remaining elements. The number of items to skip is specified using the count parameter this method expects.
Please Note: For the same argument value, the Skip method returns all of the items that the Take method would not return.
TakeWhile method returns elements from a collection as long as the given condition specified by the predicate is true.
SkipWhile method skips elements in a collection as long as the given condition specified by the predicate is true, and then returns the remaining elements.
Example 1: Retrieves
only the first 3 countries of the array.
string[] countries = { "Australia",
"Canada", "Germany",
"US", "India",
"UK", "Italy"
};
IEnumerable<string> result =
countries.Take(3);
foreach (string country in result)
{
Console.WriteLine(country);
}
Example 2:
Rewrite Example 1 using SQL like syntax
string[] countries = { "Australia",
"Canada", "Germany",
"US", "India",
"UK", "Italy"
};
IEnumerable<string> result = (from country in
countries
select country).Take(3);
foreach (string country in result)
{
Console.WriteLine(country);
}
Example 3:
Skips the first 3 countries and retrieves the rest of them
string[] countries = { "Australia",
"Canada", "Germany",
"US", "India",
"UK", "Italy"
};
IEnumerable<string> result =
countries.Skip(3);
foreach (string country in result)
{
Console.WriteLine(country);
}
Example 4:
Return countries starting from the beginning of the array until a country name
is hit that does not have length greater than 2 characters.
string[] countries = { "Australia",
"Canada", "Germany",
"US", "India",
"UK", "Italy"
};
IEnumerable<string> result =
countries.TakeWhile(s => s.Length > 2);
foreach (string country in result)
{
Console.WriteLine(country);
}
Example 5: Skip
elements starting from the beginning of the array, until a country name is hit
that does not have length greater than 2 characters, and then return the
remaining elements.
string[] countries = { "Australia",
"Canada", "Germany",
"US", "India",
"UK", "Italy"
};
IEnumerable<string> result =
countries.SkipWhile(s => s.Length > 2);
foreach (string country in result)
{
Console.WriteLine(country);
}
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