Menu

- Learn
- Documentation
  - Language Reference
  - Library Reference
  - Command-line Reference
  - Feature Overview
  - Articles
- Downloads
- Packages
- Community
  - Blog
  - Orgs using D
  - Twitter
  - Calendar
  - Forums
  - IRC
  - Wiki
  - GitHub
  - Issues
  - Get involved
  - Contributors
  - Foundation
  - Donate
  - Sponsors
- Resources
  - Tour
  - Books
  - Tutorials
  - Tools
  - Editors
  - IDEs
  - run.dlang.io
  - Visual D
  - Acknowledgments
  - D Style
  - Glossary
  - Sitemap

Search
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using a local clone.

# std.algorithm

This package implements generic algorithms oriented towards the processing of sequences. Sequences processed by these functions define range-based interfaces. See also Reference on ranges and tutorial on ranges.
Algorithms are categorized into the following submodules:

Submodule | Functions
--- | ---
Searching | all any balancedParens boyerMooreFinder canFind commonPrefix count countUntil endsWith find findAdjacent findAmong findSkip findSplit findSplitAfter findSplitBefore minCount maxCount minElement maxElement minIndex maxIndex minPos maxPos skipOver startsWith until
Comparison | among castSwitch clamp cmp either equal isPermutation isSameLength levenshteinDistance levenshteinDistanceAndPath max min mismatch predSwitch
Iteration | cache cacheBidirectional chunkBy cumulativeFold each filter filterBidirectional fold group joiner map mean permutations reduce splitter substitute sum uniq
Sorting | completeSort isPartitioned isSorted isStrictlyMonotonic ordered strictlyOrdered makeIndex merge multiSort nextEvenPermutation nextPermutation partialSort partition partition3 schwartzSort sort topN topNCopy topNIndex
Set operations (setops) | cartesianProduct largestPartialIntersection largestPartialIntersectionWeighted multiwayMerge multiwayUnion setDifference setIntersection setSymmetricDifference
Mutation | bringToFront copy fill initializeAll move moveAll moveSome moveEmplace moveEmplaceAll moveEmplaceSome remove reverse strip stripLeft stripRight swap swapRanges uninitializedFill

Many functions in this package are parameterized with a predicate. The predicate may be any suitable callable type (a function, a delegate, a functor, or a lambda), or a compile-time string. The string may consist of any legal D expression that uses the symbol a (for unary functions) or the symbols a and b (for binary functions). These names will NOT interfere with other homonym symbols in user code because they are evaluated in a different context. The default for all binary comparison predicates is "a == b" for unordered operations and "a < b" for ordered operations.

Example

    int[] a = ...;
    static bool greater(int a, int b)
    {
        return a > b;
    }
    sort!greater(a);           // predicate as alias
    sort!((a, b) => a > b)(a); // predicate as a lambda.
    sort!"a > b"(a);           // predicate as string
                               // (no ambiguity with array name)
    sort(a);                   // no predicate, "a < b" is implicit

License:
Boost License 1.0.
Authors:
Andrei Alexandrescu

Source std/algorithm/package.d

Copyright © 1999-2018 by the D Language Foundation | Page generated by Ddoc on Sun Aug 12 13:32:41 2018