bhatti

#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

bhatti

Direct links to free Springer maths books (pdf versions)

duplicates = multiple editions

A Classical Introduction to Modern Number Theory,Kenneth IrelandMichael Rosen

A Classical Introduction to Modern Number Theory,Kenneth IrelandMichael Rosen

A Course in Arithmetic,Jean-Pierre Serre

bhatti

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

bhatti

### Keybase proof

I hereby claim:

  * I am bhatti on github.
  * I am bhatti (https://keybase.io/bhatti) on keybase.
  * I have a public key ASD3eJLypkDzR9KhunFAlTg_r5qcGMn0xpUQVoRXA0otRgo

To claim this, I am signing this object:

bhatti

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision

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#[async_trait]
pub trait LockManager {
    // Attempts to acquire a lock until it either acquires the lock, or a specified additional_time_to_wait_for_lock_ms is
    // reached. This method will poll database based on the refresh_period. If it does not see the lock in database, it
    // will immediately return the lock to the caller. If it does see the lock, it will note the lease expiration on the lock. If
    // the lock is deemed stale, (that is, there is no heartbeat on it for at least the length of its lease duration) then this
    // will acquire and return it. Otherwise, if it waits for as long as additional_time_to_wait_for_lock_ms without acquiring the
    // lock, then it will return LockError::NotGranted.
    //
    async fn acquire_lock(&self, opts: &AcquireLockOptions) -> LockResult<MutexLock>;

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let config = LocksConfig::new("test_tenant");
let mutex_repo = factory::build_mutex_repository(RepositoryProvider::Rdb, &config)
	.await.expect("failed to build mutex repository");
let semaphore_repo = factory::build_semaphore_repository(
  	RepositoryProvider::Rdb, &config)
	.await.expect("failed to build semaphore repository");
let store = Box::new(DefaultLockStore::new(&config, mutex_repo, semaphore_repo));

let locks_manager = LockManagerImpl::new(
  	&config, store, &default_registry()).expect("failed to initialize lock manager");

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let config = LocksConfig::new("test_tenant");
let mutex_repo = factory::build_mutex_repository(RepositoryProvider::Rdb, &config)
	.await.expect("failed to build mutex repository");
let semaphore_repo = factory::build_semaphore_repository(
  	RepositoryProvider::Rdb, &config)
	.await.expect("failed to build semaphore repository");
let store = Box::new(DefaultLockStore::new(&config, mutex_repo, semaphore_repo));

let locks_manager = LockManagerImpl::new(
  	&config, store, &default_registry()).expect("failed to initialize lock manager");

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let mutex_repo = factory::build_mutex_repository(
  	RepositoryProvider::Ddb, &config).await.expect("failed to build mutex repository");
let semaphore_repo = factory::build_semaphore_repository(
  	RepositoryProvider::Ddb, &config).await.expect("failed to build semaphore repository");
let store = Box::new(DefaultLockStore::new(&config, mutex_repo, semaphore_repo));

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let mutex_repo = factory::build_mutex_repository(
  	RepositoryProvider::Redis, &config).await.expect("failed to build mutex repository");
let semaphore_repo = factory::build_semaphore_repository(
  	RepositoryProvider::Redis, &config).await.expect("failed to build semaphore repository");
let store = Box::new(DefaultLockStore::new(&config, mutex_repo, semaphore_repo));