Why erase remove idiom?
Calling erase multiple times on the same container generates lots of overhead of moving the elements. On the other hand, the code with the erase–remove idiom is not only more expressive, but it also is more efficient.
What is the meaning for Erase?
1a : to rub or scrape out (something, such as written, painted, or engraved letters) erase an error. b : to remove written or drawn marks from erase a blackboard. c : to remove (recorded matter) from a magnetic medium also : to remove recorded matter from erase a videotape. d : to delete from computer storage erase a …
What is to eliminate or erasing?
verb (used with object), e·rased, e·ras·ing. to rub or scrape out, as letters or characters written, engraved, etc.; efface. to eliminate completely: She couldn’t erase the tragic scene from her memory. to obliterate (material recorded on magnetic tape or a magnetic disk): She erased the message.
What does erase vector do?
vector::erase Erases the specified elements from the container. 1) Removes the element at pos . 2) Removes the elements in the range [first, last) . Invalidates iterators and references at or after the point of the erase, including the end() iterator.
How does remove if work C++?
C++ Algorithm remove_if() function is used to eliminate all the elements that satisfy a predicate from a given range [first, last) without disturbing the order of the remaining elements. This function cannot alter the size of the container. It returns an iterator to the new end of the range.
How does erase work in C++?
std::vector::erase. Removes from the vector either a single element (position) or a range of elements ([first,last)). This effectively reduces the container size by the number of elements removed, which are destroyed.
How do you use erase in a sentence?
Erase sentence example
- Why did you erase the schedule?
- Her soft touch did more than erase the worry from his brow.
- Getting married would erase her name as well.
- Jackson longed to erase her memory, but thoughts of her invaded him constantly.
- It meant everything, but it didn’t erase the ugly feeling.
What is the past form of erase?
Erase verb forms
| Infinitive | Present Participle | Past Tense |
|---|---|---|
| erase | erasing | erased |
How do you use eliminate?
1to remove or get rid of something or someone eliminate something/somebody Credit cards eliminate the need to carry a lot of cash. eliminate something/somebody from something The police have eliminated two suspects from their investigation. This diet claims to eliminate toxins from the body.
What happens to iterator after erase?
All iterators and references are unaffected. Every iterator and reference after the point of erasing is invalidated.
Does vector erase deallocate memory?
Yes. vector::erase destroys the removed object, which involves calling its destructor.
Is white space C++?
The C++ compiler generally ignores whitespace, with a few minor exceptions (when processing text literals). For this reason, we say that C++ is a whitespace-independent language.