blixt
/ logger_middleware.go
Last active
July 5, 2024 22:02
Logger middleware for Go HTTP servers which logs every request with response status code in the Apache format.
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| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "log" | |
| "net/http" | |
| "os" | |
| "time" | |
| ) |
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| @discardableResult | |
| public func then<U>(_ onFulfilled: @escaping (T) throws -> U) -> Promise<U> { | |
| return self.thenImpl(onFulfilled, { throw $0 }) | |
| } | |
| @discardableResult | |
| public func then<U>(_ onFulfilled: @escaping (T) throws -> U, _ onRejected: @escaping (Error) throws -> U) -> Promise<U> { | |
| return self.thenImpl(onFulfilled, onRejected) | |
| } | |
| @discardableResult |
blixt
/ nonblocking.go
Last active
April 25, 2016 03:58
Non-blocking reader for Go. Probably a bad idea.
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| package nonblocking | |
| import ( | |
| "io" | |
| "time" | |
| ) | |
| type NonBlockingReader struct { | |
| ch chan []byte | |
| rd io.Reader |
blixt
/ multipart.go
Created
April 24, 2016 03:49
The multipart reader hangs instead of returning the available parts.
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| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "math" | |
| "math/rand" | |
| "mime/multipart" | |
| "time" | |
| ) |
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| extension SequenceType where Generator.Element == String { | |
| func localizedJoin() -> String { | |
| var g = self.generate() | |
| guard let first = g.next() else { | |
| return "" | |
| } | |
| guard let second = g.next() else { | |
| return first | |
| } | |
| guard var last = g.next() else { |
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| struct Participant { | |
| let identifiers: [(label: String?, value: String)] | |
| } | |
| // This segfaults. Combining the two maps or changing "" to nil works. | |
| let participants = ["a", "b", "c"] | |
| .map { ("", $0) } | |
| .map { Participant(identifiers: [$0]) } | |
| // Update: Here's an error from a later build of Swift which explains the error. |
blixt
/ flatMap.swift
Last active
December 16, 2015 21:26
Using flatMap to convert a list of mixed nils and values into a list of non-optional values
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| let numbers = [ | |
| "one", | |
| "2", | |
| "0x3", | |
| "42", | |
| ] | |
| // This will run the function on all values and only keep the ones that are not nil: | |
| let parsedNumbers = numbers.flatMap { Int($0, radix: 10) } | |
| // [2, 42] |
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| indirect enum Node { | |
| case tag(String, [Node]) | |
| case text(String) | |
| } | |
| extension Node: CustomStringConvertible { | |
| var description: String { | |
| switch self { | |
| case let .tag(name, children): | |
| if children.count == 1, case let .some(.text(text)) = children.first { |
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| // Example: | |
| let url = NSURL(string: "https://example.com/hello?bla=one&bla=two&foo&bar=1")! | |
| let values = url.parseQueryString() | |
| // Result: ["bla": ["one", "two"], "bar": ["1"], "foo": []] | |
| extension NSURL { | |
| func parseQueryString() -> [String: [String]]? { | |
| guard let items = NSURLComponents(URL: self, resolvingAgainstBaseURL: false)?.queryItems else { | |
| return nil | |
| } |
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| def point_distance(a, b): | |
| degrees_to_radians = math.pi / 180 | |
| phi_a = (90 - a.lat) * degrees_to_radians | |
| phi_b = (90 - b.lat) * degrees_to_radians | |
| theta_a = a.lon * degrees_to_radians | |
| theta_b = b.lon * degrees_to_radians | |
| cos = (math.sin(phi_a) * math.sin(phi_b) * math.cos(theta_a - theta_b) + | |
| math.cos(phi_a) * math.cos(phi_b)) | |
| arc = math.acos(cos) | |
| return arc |