uuid

问题 I need to generate an unique file name with UUID1. My current python code is: uuid.uuid1().hex[:16] // i need 16 chars file name What could be the golang equivalent? Thanks! 回答1: There isn't a guid or uuid type in the standard library for Go but there are some other ways to do it, like using a third party package such as this; https://godoc.org/code.google.com/p/go-uuid/uuid or https://github.com/nu7hatch/gouuid import "github.com/nu7hatch/gouuid" id, err := uuid.NewV4() This answer has

问题 I am trying to transfer file from PC to android phone and then vice versa or b/w to android phones but got stuck. i know android programming at a expert level, i know the bluetooth API in android and in J2ME i know the bluetooth chat application but dont get exact idea to get from this. Please help me any code that works any Concept any idea that would help will be really appreciated. 回答1: Here are a couple of links, I don't know how much they will help you because you know programming very

问题 Google BigQuery doesn't support UUID as data type. So, which option is better to store it: STRING : String with the format 8-4-4-4-12 BYTES : Array of 16 bytes (128 bits) 回答1: Edit: BigQuery now supports a function called GENERATE_UUID. This returns a STRING with 32 hexadecimal digits in five groups separated by hyphens in the form 8-4-4-4-12. Original content: Some discussion of the tradeoffs: Using STRING UUIDs are compatible with the representation in other systems, such as if you export

问题 I have a python bluetooth server (using PyBluez) running on a raspberry pi. The uuid I use in the server is: 8f86d132-4ab8-4c15-b8df-0b70cf10ea56 I am calling device.fetchUuidsWithSdp() on the bluetooth server in my Android app. When it eventually fetches the uuids, they have been reversed in groups of two (it seems the endianness has changed). In the broadcast receiver: Parcelable[] uuids = intent.getParcelableArrayExtra(BluetoothDevice.EXTRA_UUID); if (uuids != null) { if (uuids.length > 0)

问题 I have an SQL statement which contains a subquery embedded in an ARRAY() like so: SELECT foo, ARRAY(SELECT x from y) AS bar ... The query works fine, however in the psycopg2 results cursor the array is returned as a string (as in "{1,2,3}" ), not a list. My question is, what would be the best way to convert strings like these into python lists? 回答1: It works for me without the need for parsing: import psycopg2 query = """ select array(select * from (values (1), (2)) s); """ conn = psycopg2

问题 I have this Document in MongoDB: { "_id": { "$oid": "5ad0873b169ade0001345d34" }, "j": { "$uuid": "94482b86-1005-e3a0-5235-55fb7c1d648a" }, "v": "sign", "d": "a", "s": "init", "response": {}, "creation_date": { "$date": "2018-04-13T10:32:27.140Z" } } I want to filter & fetch some documents in Golang using mgo, and here's my code: package main import ( "fmt" "log" "time" "gopkg.in/mgo.v2" "gopkg.in/mgo.v2/bson" ) type JOB struct { ID bson.ObjectId `bson:"_id,omitempty"` Key string `bson:"j"`

问题 I am using SecureRandom.urlsafe_base64(8) in order to create unique ids in my system that are URL safe. I would like to know how to calculate the probability of collision? I am inserting about 10.000 of those ids into an array, and I want to avoid checking if one of the keys is already in the array, but I also want to make sure that are not repeated? What are the chances? 回答1: There is a good approximation of this probability (which relates to the birthday problem). If there are k potential

问题 I have a simple C++ function that calls "uuid_generate_random". It seems the generated UUID is not standard compliant (UUID Version 4). Any Ideas? The code I am using is (uuid_generate_random & uuid_unparse functions are available in libuuid): char uuidBuff[36]; uuid_t uuidGenerated; uuid_generate_random(uuidGenerated); uuid_unparse(uuidGenerated, uuidBuff); I understand that "uuid_generate_random" generates the UUID version 4, however, the string that is being returned is like: Run1)

问题 I try to make a uuid (v 3.0.1) package work in Node/Typescript app, but I'm not sure what should I import and how to use it. This is index.d.ts (from @types/uuid v 2.0.29): declare namespace uuid { interface V1Options { node?: number[]; clockseq?: number; msecs?: number | Date; nsecs?: number; } type V4Options = { random: number[] } | { rng: () => number[]; } interface UuidStatic { (options?: V4Options): string; (options: V4Options | null, buffer: number[], offset?: number): number[];

问题 In order to make semi-random slugs, I'd like to use first 8 characters of uuid. So I have import ( fmt "github.com/satori/go.uuid" ) u1 := uuid.NewV4() fmt.Println("u1 :", u1) runes := []rune(u1) slug := string(runes[0:7]) But in compile time I get this error: cannot convert u1 (type uuid.UUID) to type []rune How can I fix it? 回答1: In that package (I just looked at the source code) a UUID is an alias for [16]byte , so you cannot concert it to a rune array, not that you want to. Try this: s :=