| /** | |
| * For a finite normal 64-bit float `f`, extracts integers `sgn`, | |
| * `exponent`, and `mantissa` such that: | |
| * | |
| * - `sgn` is -1 or +1 | |
| * - `exponent` is between -1023 and 1024, inclusive | |
| * - `mantissa` is between 0 and 2^51 - 1, inclusive | |
| * - the number given by `f` equals `sgn * 2^exponent * (1 + mantissa / 2^52)` | |
| * | |
| * The results are all bigints within the range of safe integers for |
| // Package soa implements a Structure-of-Arrays transform. | |
| // | |
| // This makes it convenient to convert a slice of values into a collection of | |
| // correlated slices of individual fields, each representing one "column". For | |
| // example, if you have a slice of N users, you can use [Collect] to extract a | |
| // slice of N user IDs, a slice of N user names, and a slice of N user emails. | |
| // Those slices can be conveniently passed as array parameters to SQL queries. | |
| // | |
| // See: https://en.wikipedia.org/wiki/AoS_and_SoA | |
| // |
| A | |
| A's | |
| AA's | |
| AB's | |
| ABM's | |
| AC's | |
| ACTH's | |
| AI's | |
| AIDS's |
| ### | |
| # gRPC server, in Go | |
| ### | |
| FROM golang:1.24.5-alpine AS server | |
| WORKDIR /root | |
| RUN apk add git | |
| RUN git clone --branch v1.74.2 --depth 1 https://github.com/grpc/grpc-go |
Suppose you have a closed, non self-intersecting 2D curve. Split this curve into N parts, not necessarily equal but with maximum length going to zero. Find a TSP solution (shortest tour containing all the points) on the sampled set. Question: for large N, does the solution mimic the curve?
(Some parts of this are underspecified. Fill in the gaps as you like...)
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| (() => { | |
| function setDark(dark) { | |
| document.documentElement.classList.toggle("dark", dark); | |
| } | |
| const mql = window.matchMedia("(prefers-color-scheme: dark)"); | |
| function updateDark() { | |
| const fromLocalStorage = localStorage.getItem("theme"); | |
| if (fromLocalStorage != null) { | |
| setDark(fromLocalStorage === "dark"); | |
| return; |
| <!doctype html> | |
| <style> | |
| img { | |
| height: 1em; | |
| } | |
| .cap { | |
| font-size: 1cap; | |
| } |
| package main | |
| import ( | |
| "fmt" | |
| "math" | |
| ) | |
| func main() { | |
| f := math.SmallestNonzeroFloat64 | |
| fmt.Println(f == 5e-324) |
| panic: test timed out after 10m0s | |
| running tests: | |
| TestGORM (10m0s) | |
| goroutine 43 [running]: | |
| testing.(*M).startAlarm.func1() | |
| /Users/wchargin/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.3.darwin-arm64/src/testing/testing.go:2373 +0x1dc | |
| created by time.goFunc | |
| /Users/wchargin/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.23.3.darwin-arm64/src/time/sleep.go:215 +0x44 |
| package main | |
| import ( | |
| "context" | |
| "fmt" | |
| "os" | |
| "runtime/pprof" | |
| "sync" | |
| "time" |