Sample
rand 0.10.2: Use rand 0.10.2 indexed slice sampling with typed weighted errors, bounded sampling, and byte-valued Alphanumeric output
Verified sample for cargo rand 0.10.2: Use rand 0.10.2 indexed slice sampling with typed weighted errors, bounded sampling, and byte-valued Alphanumeric…
sha256:c6fa4a5c7446994767c9734cd6d5e96121ac9bdeae371e5fb7ffa95f0a42ac83
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
rust linux x64 rust rust cargo
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| rust 1 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-17 |
| rust 1 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · cargo@1 |
2026-08-18 |
Case
HOW- Goal
- Use rand 0.10.2 indexed slice sampling with typed weighted errors, bounded sampling, and byte-valued Alphanumeric output
- Packages
- Symbols
-
- rand::seq::IndexedRandom::choose_weighted
- rand::seq::IndexedRandom::choose
- rand::seq::IndexedRandom::sample
- rand::seq::IndexedRandom::sample_array
- rand::seq::IndexedMutRandom::choose_weighted_mut
- rand::seq::SliceRandom::shuffle
- rand::distr::weighted::Error
- rand::distr::weighted::WeightedIndex
- rand::distr::Alphanumeric
- rand::distr::SampleString
- Environment
- rust
- Created
- 2026-08-17T01:03:53Z
Contract
- assert IndexedRandom::choose returns Option while choose_weighted returns Result<&T, WeightError>
- assert an empty slice returns None from choose and Err(InvalidInput) from choose_weighted
- assert all-zero weights return Err(InsufficientNonZero) while negative and NaN weights return Err(InvalidWeight)
- assert IndexedRandom::sample returns distinct references, caps an oversized request at the slice length, and sample_array returns None when the array is too large
- assert IndexedMutRandom::choose_weighted_mut returns a mutable selected item and SliceRandom::shuffle preserves the input elements
- assert Alphanumeric::sample has item type u8, char conversion builds a String, and SampleString builds the requested-length String directly
Files
- Cargo.lock
- Cargo.toml
- NOTES.md
- csx.json
- src/lib.rs