utils

README

gogrs - utils

Documentation

Overview

Package utils - 套件所需的公用工具（總和、平均、序列差、持續天數、 民國日期解析、簡單亂數、標準差、簡單 net/http 快取）.

Index

• Constants
• Variables
• func AvgFloat64(data []float64) float64
• func AvgUint64(data []uint64) uint64
• func CalDiffFloat64(listA, listB []float64) []float64
• func CalDiffInt64(listA, listB []int64) []int64
• func CalLHPower(final, low, high []float64) []float64
• func CountCountineFloat64(data []float64) (int, bool)
• func DeltaFloat64(data []float64) []float64
• func DeltaInt64(data []int64) []int64
• func GetOSRamdiskPath(goos string) string
• func ParseDate(strDate string) time.Time
• func RandInt() int
• func SD(list []float64) float64
• func SDUint64(list []uint64) float64
• func SumFloat64(data []float64) float64
• func SumUint64(data []uint64) uint64
• func ThanPastFloat64(data []float64, days int, max bool) bool
• func ThanPastUint64(data []uint64, days int, max bool) bool
• func ThanSumPastFloat64(data []float64, days int, max bool) bool
• func ThanSumPastUint64(data []uint64, days int, max bool) bool
• type HTTPCache
  • func NewHTTPCache(dir string, fromEncoding string) *HTTPCache
  • func (hc *HTTPCache) FlushAll()
  • func (hc HTTPCache) Get(url string, rand bool) ([]byte, error)
  • func (hc HTTPCache) PostForm(url string, data url.Values) ([]byte, error)

Examples

• AvgFloat64
• AvgUint64
• CalDiffFloat64
• CalDiffInt64
• CountCountineFloat64
• DeltaFloat64
• DeltaInt64
• HTTPCache
• ParseDate

Constants

const (
	TWSEURL     string = "http://mis.tse.com.tw"
	TWSEHOST    string = "http://www.twse.com.tw"
	OTCHOST     string = "http://www.tpex.org.tw"
	OTCCSV      string = "/ch/stock/aftertrading/daily_trading_info/st43_download.php?d=%d/%02d&stkno=%s&r=%%d"           // year, mon, stock, rand
	OTCLISTCSV  string = "/web/stock/aftertrading/otc_quotes_no1430/stk_wn1430_download.php?l=zh-tw&d=%s&se=%s&s=0,asc,0" // date, cate
	TWSECSV     string = "/ch/trading/exchange/STOCK_DAY/STOCK_DAYMAIN.php"
	TWSELISTCSV string = "/ch/trading/exchange/MI_INDEX/MI_INDEX.php" // year, mon, day, type
	TWSEREAL    string = "/stock/api/getStockInfo.jsp?ex_ch=%s_%s.tw_%s&json=1&delay=0&_=%d"
	QFIISTOP20  string = "/ch/trading/fund/MI_QFIIS_sort_20/MI_QFIIS_sort_20.php"                                                              // yyyymmdd
	BFI82U      string = "/ch/trading/fund/BFI82U/BFI82U_print.php?begin_date=%d%02d%d&end_date=%d%02d%d&report_type=day&language=ch&save=csv" // yyyymmdd
	T86         string = "/ch/trading/fund/T86/T86.php"
	TWTXXU      string = "/ch/trading/fund/%s/%s.php?download=csv&qdate=%d/%02d/%02d&sorting=by_issue"
	S3CSV       string = "https://s3-ap-northeast-1.amazonaws.com/toomore/gogrs/list.csv"
)

TWSE base url.

const TempFolderName = ".gogrscache"

TempFolderName 快取資料夾名稱

Variables

var ExchangeMap = map[string]bool{"tse": true, "otc": true}

ExchangeMap is simple to check tse or otc.

var HTTPClient = &http.Client{Transport: &http.Transport{
	Proxy: http.ProxyFromEnvironment,
	Dial: (&net.Dialer{
		Timeout:   0,
		KeepAlive: 0,
	}).Dial,
	TLSHandshakeTimeout: 1 * time.Second,
},
}

HTTPClient is default func and fixed http too many open files.

var TaipeiTimeZone = time.FixedZone("Asia/Taipei", 8*3600)

TaipeiTimeZone is for time.Data() setting.

Functions

func AvgFloat64

func AvgFloat64(data []float64) float64

AvgFloat64 計算平均（float64）

Example

fmt.Println(AvgFloat64([]float64{1.1, 2.2, 9.9}))

Output:

4.4

func AvgUint64

func AvgUint64(data []uint64) uint64

AvgUint64 計算平均（uint64）

Example

fmt.Println(AvgUint64([]uint64{1, 2, 9}))

Output:

4

func CalDiffFloat64

func CalDiffFloat64(listA, listB []float64) []float64

CalDiffFloat64 計算兩序列的差（listA - listB）

Example

var sample1 = []float64{1.1, 2.2, 3.3, 4.4, 5.5}
var sample2 = []float64{5.5, 4.4, 3.3, 2.2, 2.2}
fmt.Println(CalDiffFloat64(sample1, sample2))

Output:

[-4.4 -2.2 0 2.2 3.3]

func CalDiffInt64

func CalDiffInt64(listA, listB []int64) []int64

CalDiffInt64 計算兩序列的差（listA - listB）

Example

var sample1 = []int64{1, 2, 3, 4, 5}
var sample2 = []int64{5, 4, 3, 2, 2}
fmt.Println(CalDiffInt64(sample1, sample2))

Output:

[-4 -2 0 2 3]

func CalLHPower

func CalLHPower(final, low, high []float64) []float64

CalLHPower 計算兩序列與終點的比例

func CountCountineFloat64

func CountCountineFloat64(data []float64) (int, bool)

CountCountineFloat64 計算最後一個數值為正或負值的持續天數（float64）

Example

var sample1 = []float64{-1, 0, 1, 2, 3}
fmt.Println(CountCountineFloat64(sample1))

var sample2 = []float64{1, 0, -1, -2, -3}
fmt.Println(CountCountineFloat64(sample2))

Output:

3 true
3 false

func DeltaFloat64

func DeltaFloat64(data []float64) []float64

DeltaFloat64 計算數列間距差

Example

fmt.Println(DeltaFloat64([]float64{-1.1, 0, 1.1, 2.2, 3.3}))

Output:

[1.1 1.1 1.1 1.0999999999999996]

func DeltaInt64

func DeltaInt64(data []int64) []int64

DeltaInt64 計算數列間距差

Example

fmt.Println(DeltaInt64([]int64{-1, 0, 1, 2, 3}))

Output:

[1 1 1 1]

func GetOSRamdiskPath

func GetOSRamdiskPath(goos string) string

GetOSRamdiskPath try to get RamDisk path.

func ParseDate

func ParseDate(strDate string) time.Time

ParseDate is to parse "104/01/13" format.

Example

fmt.Println(ParseDate("104/09/29"))
fmt.Println(ParseDate("104/9/29"))
fmt.Println(ParseDate("104/9/2"))

Output:

2015-09-29 00:00:00 +0800 Asia/Taipei
2015-09-29 00:00:00 +0800 Asia/Taipei
2015-09-02 00:00:00 +0800 Asia/Taipei

func RandInt

func RandInt() int

RandInt return random int.

func SD

func SD(list []float64) float64

SD 計算標準差

func SDUint64

func SDUint64(list []uint64) float64

SDUint64 計算標準差

func SumFloat64

func SumFloat64(data []float64) float64

SumFloat64 計算總和（float64）

func SumUint64

func SumUint64(data []uint64) uint64

SumUint64 計算總和（uint64）

func ThanPastFloat64

func ThanPastFloat64(data []float64, days int, max bool) bool

ThanPastFloat64 計算最後一個數值是否為過去幾天最大或最小（float64）

func ThanPastUint64

func ThanPastUint64(data []uint64, days int, max bool) bool

ThanPastUint64 計算最後一個數值是否為過去幾天最大或最小（uint64）

func ThanSumPastFloat64

func ThanSumPastFloat64(data []float64, days int, max bool) bool

ThanSumPastFloat64 計算最後一個數值是否為過去幾天的總和大或小（float64）

func ThanSumPastUint64

func ThanSumPastUint64(data []uint64, days int, max bool) bool

ThanSumPastUint64 計算最後一個數值是否為過去幾天的總和大或小（uint64）

Types

type HTTPCache

type HTTPCache struct {
	Dir string
	// contains filtered or unexported fields
}

HTTPCache net/http 快取功能

Example

目前可以支援 http.Get / http.PostForm 取得資料並儲存

hc := NewHTTPCache("/run/shm/", "utf8") // linux

ex1, _ := hc.Get("http://httpbin.org/get", false)
ex2, _ := hc.Get("http://httpbin.org/get?q=%d", true)
ex3, _ := hc.PostForm("http://httpbin.org/post", url.Values{"name": {"Toomore"}})

fmt.Printf("%s %s %s", ex1, ex2, ex3)

func NewHTTPCache

func NewHTTPCache(dir string, fromEncoding string) *HTTPCache

NewHTTPCache New 一個 HTTPCache.

dir 為暫存位置，fromEncoding 來源檔案的編碼，一律轉換為 utf8

func (*HTTPCache) FlushAll

func (hc *HTTPCache) FlushAll()

FlushAll 清除快取

func (HTTPCache) Get

func (hc HTTPCache) Get(url string, rand bool) ([]byte, error)

Get 透過 http.Get 取得檔案或從暫存中取得檔案

rand 為是否支援網址帶入亂數值，url 需有 '%d' 格式。

func (HTTPCache) PostForm

func (hc HTTPCache) PostForm(url string, data url.Values) ([]byte, error)

PostForm 透過 http.PostForm 取得檔案或從暫存中取得檔案