or-tools
goleveldb
or-tools | goleveldb | |
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57 | 15 | |
10,446 | 6,025 | |
0.9% | - | |
9.9 | 0.0 | |
7 days ago | 5 months ago | |
C++ | Go | |
Apache License 2.0 | BSD 2-clause "Simplified" License |
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or-tools
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or-tools VS timefold-solver - a user suggested alternative
2 projects | 4 Jan 2024
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A* Tricks for Videogame Path Finding
Small NP-hard problems aren't actually that bad. You can usually formulate them as eg a integer programming problem or a SMT problem, and throw an off-the-shelf solver at them.
You only need to learn the solver once, and you can re-use it for all kinds of problems. (Assuming that your instances don't have to be solved with low latency. Eg only as part of your level generation process, or at most when loading a randomly generated level, but not every frame or so.)
https://developers.google.com/optimization has a decent collection of tools.
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Ask HN: Comment here about whatever you're passionate about at the moment
Just saw that it looks like an upcoming release of OR-Tools might include reified tables: https://github.com/google/or-tools/commit/94f3d9b46870e7ea04...
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[P] Advice needed for what tool/algorithm is appropriate
Google OR - Tried to represent a solution to be a 5 dimensional matrix with an hour granularity. Dimensions are stations, program, project manager, day and time. If matrix[station][program][project manager][day][time] = 1, then that set is assigned, otherwise not. The main issue encountered here is about time slots, as they are not necessarily on a per hour basis. We tried time slots to be in a 5-minute interval. However, constructing the constraints that would adhere to each programs duration was proven to be difficult.
- What software is used in the field these days?
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Sudoku solver
If you are just interested in getting a solution or for having a reference solver: There is a sudoku example in the OR-Tools package that uses constraint programming.
- Matrix / 2d Array Puzzle-Like Problem
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Linear Programming
Not sql, but check out google’s OR-Tools. Hardly ever gets mentioned but looks very capable for some applications. https://developers.google.com/optimization
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Would anyone know how to auto schedule tasks based on certain constraints?
Then there's also the Google's solution: https://developers.google.com/optimization/
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Assignment to at most K groups from distance matrix?
start enumerating the properties you think the solution to your problem should have. once you have this, you should be able to reformulate those properties as constraints and then you can just plug this into a combinatorial solver such as https://developers.google.com/optimization
goleveldb
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Looking for fast, space-efficient key-lookup
Looks like a job for GoLevelDB.
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Open Source Databases in Go
goleveldb - Implementation of the LevelDB key/value database in Go.
- A Database for 2022
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An IndexedDB clone in pure Go
I wanted to get deeper insights into both indexeddb and leveldb, so decided to write an indexeddb wrapper around goleveldb.
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What type of software do you write at your workplace?
https://github.com/syndtr/goleveldb for heavy-duty local data storage.
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Embedded write-heavy on-disk cache, write-amplification
We're using go-leveldb for a reasonably high-load case here at my $dayjob.
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Best way to store logs?
I would used some embedded kv store like go-leveldb or bolt. Key is BigEnding timestamp + optional tail to allow duplicate timestamps.
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Memory leack (?) with pprof on graphql server
I'm using the leveldb https://github.com/syndtr/goleveldb for the moment because I'm developing the architecture. Mh, leveldb support the only the inmem db? :/
- IceFireDB:Distributed disk storage database based on Raft and Redis protocol.
- https://np.reddit.com/r/programming/comments/p7a56u/icefiredbdistributed_disk_storage_database_based/h9i9j44/
What are some alternatives?
OptaPlanner - Java Constraint Solver to solve vehicle routing, employee rostering, task assignment, maintenance scheduling, conference scheduling and other planning problems.
badger - Fast key-value DB in Go.
optapy - OptaPy is an AI constraint solver for Python to optimize planning and scheduling problems.
bolt
pyomo - An object-oriented algebraic modeling language in Python for structured optimization problems.
bbolt - An embedded key/value database for Go.
SciPy - SciPy library main repository
buntdb - BuntDB is an embeddable, in-memory key/value database for Go with custom indexing and geospatial support
optaplanner-quickstarts - Mirror of https://github.com/apache/incubator-kie-optaplanner-quickstarts
Tile38 - Real-time Geospatial and Geofencing
SWIG - SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages.
kingshard - A high-performance MySQL proxy