Zip extension method

ZIP files have capability to store multiple files using different compression techniques while at the same time supports storing a file without any compression. In order to render the compressed files, a ZIP archive holds a directory at its end that keeps the entry of the contained files and their location in the archive file. It, thus, plays the role of encoding for encapsulating information necessary to render the compressed files.

The format keeps dual copies of the directory structure to provide greater protection against loss of data. Each file in a ZIP archive is represented as an individual entry where each entry consists of a Local File Header followed by the compressed file data. The Directory at the end of archive holds the references to all these file entries.

ZIP file readers should avoid reading the local file headers and all sort of file listing should be read from the Directory. If it is unknown which sequence will be the shorter one, a function can be created that susses it:.

Going back to the main answer of the original question , another interesting thing that one might wish to do when the lengths of the sequences to be "zipped" are different is to join them in such a way so that the end of the list matches instead of the top. This can be accomplished by "skipping" the appropriate number of items using.

As others have stated, Zip lets you combine two collections for use in further Linq statements or a foreach loop. Operations that used to require a for loop and two arrays can now be done in a foreach loop using an anonymous object. An example I just discovered, that is kind of silly, but could be useful if parallelization were beneficial would be a single line Queue traversal with side effects:.

Skip 1 represents the next or peek items in a queue. The Zip method combines these two into a single anonymous object with a Next and Current property. Then we filter with Where and make changes with AsParallel. Of course the last bit could just be a regular foreach or another Select statement that returns the offending time segments. The Zip method allows you to "merge" two unrelated sequences, using a merging function provider by you, the caller.

In this example, you take two arbitrary, unrelated sequences, and combine them using an arbitrary function in this case, just concatenating items from both sequences into a single string. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 10 years, 10 months ago. Active 1 month ago. Viewed 54k times. Jim G. Are you referring to this: msdn. It's like the two sides of a zipper coming together. Possible duplicate of What is the purpose of a zip function as in Python or C 4. Add a comment. Active Oldest Votes. ToString ; foreach var s in q Console. I like this answer because it shows what happens when the number of elements doesn't match up, similar to the msdn documentation — DLeh.

B Write a method to yield return each element of the shorter list, and then continue yield return ing default indefinitely thereafter. Option B requires you to know in advance which list is shorter. Zip is for combining two sequences into one. Definitely the best explanation here. Loved the example of zipper. It was so natural. My initial impression was if it has something to do with speed or something like that as if you zip through a street on your car.

Privacy policy. Thank you. Microsoft makes no warranties, express or implied, with respect to the information provided here. Extracts an entry in the zip archive to a file, and optionally overwrites an existing file that has the same name. The path of the file to create from the contents of the entry.

You can specify either a relative or an absolute path. A relative path is interpreted as relative to the current working directory. Returns the element at a specified index in a sequence or a default value if the index is out of range. Produces the set difference of two sequences by using the default equality comparer to compare values.

Returns the first element of a sequence, or a default value if the sequence contains no elements. Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.

Returns the first element of the sequence that satisfies a condition, or a specified default value if no such element is found. Returns the first element of a sequence, or a specified default value if the sequence contains no elements. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function.

Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. Groups the elements of a sequence according to a key selector function.

The keys are compared by using a comparer and each group's elements are projected by using a specified function. The keys are compared by using a specified comparer. Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.

Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. Correlates the elements of two sequences based on key equality and groups the results. Produces the set intersection of two sequences by using the default equality comparer to compare values. Correlates the elements of two sequences based on matching keys.

Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. Returns the last element of a sequence that satisfies a condition, or a specified default value if no such element is found. Returns the last element of a sequence, or a specified default value if the sequence contains no elements. Returns an Int64 that represents the total number of elements in a sequence.

Returns an Int64 that represents how many elements in a sequence satisfy a condition. Returns the maximum value in a sequence of Decimal values. Returns the maximum value in a sequence of Double values. Returns the maximum value in a sequence of Int32 values. Returns the maximum value in a sequence of Int64 values. Returns the maximum value in a sequence of nullable Decimal values. Returns the maximum value in a sequence of nullable Double values.

Returns the maximum value in a sequence of nullable Int32 values. Returns the maximum value in a sequence of nullable Int64 values. Returns the maximum value in a sequence of nullable Single values. Returns the maximum value in a sequence of Single values. Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. Invokes a transform function on each element of a sequence and returns the maximum Decimal value.

Invokes a transform function on each element of a sequence and returns the maximum Double value. Invokes a transform function on each element of a sequence and returns the maximum Int32 value. Invokes a transform function on each element of a sequence and returns the maximum Int64 value. Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.

Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. Invokes a transform function on each element of a sequence and returns the maximum Single value.