The Detroit Post
Saturday, 16 October, 2021

Rust To_owned

author
Maria Garcia
• Friday, 11 December, 2020
• 7 min read

A generalization of Clone to borrowed data. Some types make it possible to go from borrowed to owned, usually by implementing the Clone trait.

(Source: davidsclassiccars.com)

Contents

The Owned trait generalizes Clone to construct owned data from any borrow of a given type. The resulting type after obtaining ownership.

Making statements based on opinion; back them up with references or personal experience. To_string() is the generic conversion to a String from any type implementing the String trait.

It uses the formatting functions and therefor might end up doing multiple allocations and running much more code than a simple to_owned () which just allocates a buffer and copies the literal into the buffer. This may be fixed in the future with specialization, as STR could implement String directly instead of having it go through the generic imply String for T where T: Display {} implementation, which employs the formatting framework.

I found that my opinion on this has changed significantly over the past 12 months as I have grown more experienced with Rust. I now strongly prefer to_owned () for string literals over either of to_string() or into().

Taking something that is a string and converting it to a string using to_string() seems like it misses the point of why we are doing this in the first place, and more importantly misses the opportunity to document this to our readers. Using to_owned () fully captures the reason that a conversion is required at a particular spot in our code.

(Source: davidsclassiccars.com)

Searches for an element of an iterator that satisfies a predicate. Applies function to the elements of iterator and returns the first non-none result.

Searches for an element in an iterator, returning its index. Searches for an element in an iterator from the right, returning its index.

Checks if the elements of this iterator are sorted using the given comparator function. Fn map (self, f: F) Map where F: Input (Self:: Item) B, Takes a closure and creates an iterator which calls that closure on each element.

Creates an iterator which uses a closure to determine if an element should be yielded. Creates an iterator that both filters and maps.

Creates an iterator that skip s elements based on a predicate. Creates an iterator that yields elements based on a predicate.

(Source: davidsclassiccars.com)

Creates an iterator that both yields elements based on a predicate and maps. Creates an iterator that skips the first n elements.

Creates an iterator that yields its first n elements. Where F: Input (smut St, Self:: Item) Option , An iterator adaptor similar to fold that holds internal state and produces a new iterator.

Creates an iterator that works like map, but flattens nested structure. Creates an iterator that flattens nested structure.

#FN collect (self) B where B: FromIterator , Transforms an iterator into a collection. Consumes an iterator, creating two collections from it.

Reorders the elements of this iterator in-place according to the given predicate, such that all those that return true precede all those that return false. Returns the number of true elements found.

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Checks if the elements of this iterator are partitioned according to the given predicate, such that all those that return true precede all those that return false. Fn try_fold (smut self, unit: B, f: F) R where F: Input (B, Self:: Item) R, R: Try , 1.27.0 An iterator method that applies a function as long as it returns successfully, producing a single, final value.

Fn try_for_each (smut self, f: F) R where F: Input (Self:: Item) R, R: Try , 1.27.0 An iterator method that applies a fallible function to each item in the iterator, stopping at the first error and returning that error. Fn fold (self, unit: B, f: F) B where F: Input (B, Self:: Item) B, An iterator method that applies a function, producing a single, final value.

The same as fold(), but uses the first element in the iterator as the initial value, folding every subsequent element into it. Applies function to the elements of iterator and returns the first true result or the first error.

Returns the element that gives the maximum value from the specified function. Returns the element that gives the maximum value with respect to the specified comparison function.

Returns the element that gives the minimum value from the specified function. Returns the element that gives the minimum value with respect to the specified comparison function.

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Compares the elements of this Iterator with those of another with respect to the specified comparison function. Compares the elements of this Iterator with those of another with respect to the specified comparison function.

Determines if the elements of this Iterator are unequal to those of another. Determines if the elements of this Iterator are less or equal to those of another.

Determines if the elements of this Iterator are greater than those of another. Determines if the elements of this Iterator are greater than or equal to those of another.

Checks if the elements of this iterator are sorted. Checks if the elements of this iterator are sorted using the given key extraction function.

Advances the iterator from the back by n elements. Fn try_rfold (smut self, unit: B, f: F) R where F: Input (B, Self:: Item) R, R: Try , 1.27.0 FN fold (self, unit: B, f: F) B where F: Input (B, Self:: Item) B, 1.27.0 An iterator method that reduces the iterator's elements to a single, final value, starting from the back.

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Fn find

(smut self, predicate: P) Option where P: Input (self:: Item) built, 1.27.0 Searches for an element of an iterator from the back that satisfies a predicate. Capture a closure's environment by value.

Move converts any variables captured by reference or mutable reference to owned by value variables. Move is also valid before an asynchronous block.

Sources
1 www.facebook.com - https://www.facebook.com/BrokerJeremy
2 bourne.fandom.com - https://bourne.fandom.com/wiki/Christian_Dassault
3 www.healthenterprisesnetwork.com - https://www.healthenterprisesnetwork.com/louisvilles-health-care-history/bruce-lunsford-bio/
4 en.wikipedia.org - https://en.wikipedia.org/wiki/Nick_Canon