laixintao

# -*- coding: utf-8 -*-
from ratelimit import limits, sleep_and_retry
from time import time

count = 0


@sleep_and_retry
@limits(calls=3, period=5)
def call_api():

laixintao

from subprocess import run

# not working, Bad file descriptor
run(
    "head /dev/random -c 100",
    stdout=open("/tmp/head.out", "wb", 0).fileno(),
    shell=True,
)

laixintao

PASS: run-backtrace-fp-core-x86_64.sh
PASS: run-backtrace-fp-core-aarch64.sh
PASS: run-backtrace-fp-core-ppc64le.sh
PASS: run-backtrace-core-x32.sh
PASS: run-backtrace-core-i386.sh
PASS: run-backtrace-fp-core-i386.sh
PASS: run-backtrace-core-ppc.sh
PASS: run-backtrace-core-s390x.sh
PASS: run-backtrace-core-s390.sh
PASS: run-backtrace-core-aarch64.sh

laixintao

import React, { Component } from '@alipay/bigfish/react'
import { Flex, Card, WingBlank, WhiteSpace } from 'antd-mobile'

export default class ExampleCard extends Component {
  render() {
    return (
      <WingBlank size="lg">
        <WhiteSpace size="lg" />
        <Card>
          <Card.Header

laixintao

# -*- coding: utf-8 -*-
import re


re.compile(r'^(?:(?:\s){0,}(?P<n0>(?:CLUSTER(?:\s){1,}ADDSLOTS|CLUSTER(?:\s){1,}DELSLOTS|cluster(?:\s){1,}addslots|cluster(?:\s){1,}delslots))(?:\s){1,}(?P<n1>(?:\d){1,}(?:(?:\s){1,}(?:\d){1,}){0,})(?:\s){0,}|(?:\s){0,}(?P<n2>(?:CLUSTER(?:\s){1,}COUNT-FAILURE-REPORTS|CLUSTER(?:\s){1,}FORGET|CLUSTER(?:\s){1,}REPLICAS|CLUSTER(?:\s){1,}REPLICATE|CLUSTER(?:\s){1,}SLAVES|cluster(?:\s){1,}count-failure-reports|cluster(?:\s){1,}forget|cluster(?:\s){1,}replicas|cluster(?:\s){1,}replicate|cluster(?:\s){1,}slaves))(?:\s){1,}(?P<n3>(?:\d){1,})(?:\s){0,}|(?:\s){0,}(?P<n4>(?:CLUSTER(?:\s){1,}COUNTKEYSINSLOT|cluster(?:\s){1,}countkeysinslot))(?:\s){1,}(?P<n5>(?:\d){1,})(?:\s){0,}|(?:\s){0,}(?P<n6>(?:CLUSTER(?:\s){1,}FAILOVER|cluster(?:\s){1,}failover))(?:\s){1,}(?P<n7>(?:FORCE|TAKEOVER|force|takeover))(?:\s){0,}|(?:\s){0,}(?P<n8>(?:CLUSTER(?:\s){1,}RESET|cluster(?:\s){1,}reset))(?:\s){1,}(?P<n9>(?:HARD|SOFT|hard|soft))(?:\s){0,}|(?:\s){0,}(?P<n10>(?:CLUSTER(?:\s){1,}GETKEYSINSLOT|cluster

laixintao

echo "\$* in quotes..."
for v in "$*"
do
    echo $v
done

echo "\$@ in quotes..."
for v in "$@"
do
    echo $v

laixintao

for file in $(fd -x file | rg "UTF-8" | cut -f1 -d":")
do
    echo "convert ${file}..."
    iconv -f utf8 -t gbk "$file" > "$file.new" &&
    mv -f "$file.new" "$file"
done

laixintao

SELECT table_schema "DB Name",
        ROUND(SUM(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB" 
        FROM information_schema.tables 
        GROUP BY table_schema; 

laixintao

4KB 不是随机的一个数，Block device 的读操作是按照 block size 来的，读操作按照 block size align才会更快（size是block size的倍数）。

可以用 dd 对比一下每次读 1bytes，读2097152次，和每次读 1024bytes，一共2048次的速度：

➜  ~ dd bs=1 count=2097152 if=/dev/zero of=pirate
2097152+0 records in
2097152+0 records out
2097152 bytes transferred in 6.048756 secs (346708 bytes/sec)
➜  ~ dd bs=1024 count=2048 if=/dev/zero of=pirate

laixintao

git filter-branch --env-filter '
OLD_EMAIL="your email"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_AUTHOR_DATE=$(git show -q --format=%aD $GIT_COMMIT | xargs -I {} gdate --date={} +"%F 23:00:00" | xargs -I {} gdate --date={} +%s)
    export GIT_COMMITTER_DATE=$(git show -q --format=%aD "$GIT_COMMIT" | xargs -I {} gdate --date={} +"%F 23:00:00" | xargs -I {} gdate --date={} +%s)
fi
if [ "$GIT_AUTHOR_EMAIL" = "$OLD_EMAIL" ]
then
    export GIT_AUTHOR_DATE=$(git show -q --format=%aD "$GIT_COMMIT" | xargs -I {} gdate --date={} +"%F 23:00:00" | xargs -I {} gdate --date={} +%s)