More minor cleanups (no functional change) (#198)

* Redundant type conversions

* Remove redudant type declarations. Inline one-line constructors. Remove unnecessary brackets.

* Simplify name - it's used via package name anyway

* Simplify variable initializations

* Change `var x uint = Y` to `x := uint(Y)`

* More shorthand initialization

cmd/commands/holdings.go

@@ -17,7 +17,7 @@ func HoldingsCmd() *cobra.Command {
 	var config string
 	var sortBy string
 	var sortDesc bool
-	var format string = "table"
+	var format = "table"
 	var humanReadable bool
 	var filter []string
 	var cols []string

cmd/commands/server.go

@@ -14,15 +14,15 @@ import (
 
 // ServerCmd ...
 func ServerCmd() *cobra.Command {
-	var port uint = 22
-	var address string = "0.0.0.0"
-	var idleTimeout uint = 0
-	var maxTimeout uint = 0
-	var maxSessions uint = 0
-	var executableBinary string = "cointop"
-	var hostKeyFile string = cssh.DefaultHostKeyFile
-	var userConfigType string = cssh.UserConfigTypePublicKey
-	var colorsDir string = os.Getenv("COINTOP_COLORS_DIR")
+	port := uint(22)
+	address := "0.0.0.0"
+	idleTimeout := uint(0)
+	maxTimeout := uint(0)
+	maxSessions := uint(0)
+	executableBinary := "cointop"
+	hostKeyFile := cssh.DefaultHostKeyFile
+	userConfigType := cssh.UserConfigTypePublicKey
+	colorsDir := os.Getenv("COINTOP_COLORS_DIR")
 
 	serverCmd := &cobra.Command{
 		Use:   "server",

cointop/chart.go

@@ -25,8 +25,7 @@ type ChartView = ui.View
 
 // NewChartView returns a new chart view
 func NewChartView() *ChartView {
-	var view *ChartView = ui.NewView("chart")
-	return view
+	return ui.NewView("chart")
 }
 
 var chartLock sync.Mutex
@@ -50,17 +49,17 @@ func ChartRanges() []string {
 // ChartRangesMap returns map of chart range time ranges
 func ChartRangesMap() map[string]time.Duration {
 	return map[string]time.Duration{
-		"All Time": time.Duration(10 * 365 * 24 * time.Hour),
-		"YTD":      time.Duration(1 * time.Second), // this will be calculated
-		"1Y":       time.Duration(365 * 24 * time.Hour),
-		"6M":       time.Duration(365 / 2 * 24 * time.Hour),
-		"3M":       time.Duration(365 / 4 * 24 * time.Hour),
-		"1M":       time.Duration(365 / 12 * 24 * time.Hour),
-		"7D":       time.Duration(24 * 7 * time.Hour),
-		"3D":       time.Duration(24 * 3 * time.Hour),
-		"24H":      time.Duration(24 * time.Hour),
-		"6H":       time.Duration(6 * time.Hour),
-		"1H":       time.Duration(1 * time.Hour),
+		"All Time": 10 * 365 * 24 * time.Hour,
+		"YTD":      1 * time.Second, // this will be calculated
+		"1Y":       365 * 24 * time.Hour,
+		"6M":       365 / 2 * 24 * time.Hour,
+		"3M":       365 / 4 * 24 * time.Hour,
+		"1M":       365 / 12 * 24 * time.Hour,
+		"7D":       24 * 7 * time.Hour,
+		"3D":       24 * 3 * time.Hour,
+		"24H":      24 * time.Hour,
+		"6H":       6 * time.Hour,
+		"1H":       1 * time.Hour,
 	}
 }
 
@@ -119,7 +118,7 @@ func (ct *Cointop) ChartPoints(symbol string, name string) error {
 
 	rangeseconds := ct.chartRangesMap[ct.State.selectedChartRange]
 	if ct.State.selectedChartRange == "YTD" {
-		ytd := time.Now().Unix() - int64(timeutil.BeginningOfYear().Unix())
+		ytd := time.Now().Unix() - timeutil.BeginningOfYear().Unix()
 		rangeseconds = time.Duration(ytd) * time.Second
 	}
 
@@ -216,7 +215,7 @@ func (ct *Cointop) PortfolioChart() error {
 	selectedChartRange := ct.State.selectedChartRange // cache here
 	rangeseconds := ct.chartRangesMap[selectedChartRange]
 	if selectedChartRange == "YTD" {
-		ytd := time.Now().Unix() - int64(timeutil.BeginningOfYear().Unix())
+		ytd := time.Now().Unix() - timeutil.BeginningOfYear().Unix()
 		rangeseconds = time.Duration(ytd) * time.Second
 	}
 

cointop/cointop.go

@@ -182,19 +182,19 @@ var DefaultCurrency = "USD"
 var DefaultChartRange = "1Y"
 
 // DefaultMaxChartWidth ...
-var DefaultMaxChartWidth int = 175
+var DefaultMaxChartWidth = 175
 
 // DefaultChartHeight ...
-var DefaultChartHeight int = 10
+var DefaultChartHeight = 10
 
 // DefaultSortBy ...
 var DefaultSortBy = "rank"
 
 // DefaultPerPage ...
-var DefaultPerPage uint = 100
+var DefaultPerPage = uint(100)
 
 // DefaultMaxPages ...
-var DefaultMaxPages uint = 35
+var DefaultMaxPages = uint(35)
 
 // DefaultColorscheme ...
 var DefaultColorscheme = "cointop"

cointop/config.go

@@ -227,9 +227,9 @@ func (ct *Cointop) ConfigToToml() ([]byte, error) {
 		if !ok || entry.Coin == "" {
 			continue
 		}
-		var amount string = strconv.FormatFloat(entry.Holdings, 'f', -1, 64)
-		var coinName string = entry.Coin
-		var tuple []string = []string{coinName, amount}
+		amount := strconv.FormatFloat(entry.Holdings, 'f', -1, 64)
+		coinName := entry.Coin
+		tuple := []string{coinName, amount}
 		holdingsIfc = append(holdingsIfc, tuple)
 	}
 	sort.Slice(holdingsIfc, func(i, j int) bool {

cointop/keybindings.go

@@ -377,7 +377,7 @@ func (ct *Cointop) SetKeybindings() error {
 	// TODO: use scrolling table
 	keys := ct.SortedSupportedCurrencyConversions()
 	for i, k := range keys {
-		ct.SetKeybindingMod(rune(alphanumericcharacters[i]), gocui.ModNone, ct.Keyfn(ct.SetCurrencyConverstionFn(k)), ct.Views.Menu.Name())
+		ct.SetKeybindingMod(alphanumericcharacters[i], gocui.ModNone, ct.Keyfn(ct.SetCurrencyConverstionFn(k)), ct.Views.Menu.Name())
 	}
 
 	return nil

cointop/marketbar.go

@@ -19,8 +19,7 @@ type MarketbarView = ui.View
 
 // NewMarketbarView returns a new marketbar view
 func NewMarketbarView() *MarketbarView {
-	var view *MarketbarView = ui.NewView("marketbar")
-	return view
+	return ui.NewView("marketbar")
 }
 
 // UpdateMarketbar updates the market bar view
@@ -54,7 +53,7 @@ func (ct *Cointop) UpdateMarketbar() error {
 
 		var percentChange24H float64
 		for _, p := range ct.GetPortfolioSlice() {
-			n := ((p.Balance / total) * p.PercentChange24H)
+			n := (p.Balance / total) * p.PercentChange24H
 			if math.IsNaN(n) {
 				continue
 			}

cointop/menu.go

@@ -10,8 +10,7 @@ type MenuView = ui.View
 
 // NewMenuView returns a new menu view
 func NewMenuView() *MenuView {
-	var view *MenuView = ui.NewView("menu")
-	return view
+	return ui.NewView("menu")
 }
 
 // HideMenu hides the menu view

cointop/navigation.go

@@ -413,7 +413,7 @@ func (ct *Cointop) GoToGlobalIndex(idx int) error {
 	l := ct.TableRowsLen()
 	atpage := idx / l
 	ct.SetPage(atpage)
-	rowIndex := (idx % l)
+	rowIndex := idx % l
 	ct.HighlightRow(rowIndex)
 	ct.UpdateTable()
 	return nil

cointop/portfolio.go

@@ -983,7 +983,7 @@ func (ct *Cointop) PrintHoldings24HChange(options *TablePrintOptions) error {
 			}
 		}
 
-		n := ((entry.Balance / total) * entry.PercentChange24H)
+		n := (entry.Balance / total) * entry.PercentChange24H
 		if math.IsNaN(n) {
 			continue
 		}

cointop/search.go

@@ -14,8 +14,7 @@ type SearchFieldView = ui.View
 
 // NewSearchFieldView returns a new search field view
 func NewSearchFieldView() *SearchFieldView {
-	var view *SearchFieldView = ui.NewView("searchfield")
-	return view
+	return ui.NewView("searchfield")
 }
 
 // InputView is structure for help view
@@ -23,8 +22,7 @@ type InputView = ui.View
 
 // NewInputView returns a new help view
 func NewInputView() *InputView {
-	var view *InputView = ui.NewView("input")
-	return view
+	return ui.NewView("input")
 }
 
 // OpenSearch opens the search field

cointop/statusbar.go

@@ -15,8 +15,7 @@ type StatusbarView = ui.View
 
 // NewStatusbarView returns a new statusbar view
 func NewStatusbarView() *StatusbarView {
-	var view *StatusbarView = ui.NewView("statusbar")
-	return view
+	return ui.NewView("statusbar")
 }
 
 // UpdateStatusbar updates the statusbar view

cointop/table.go

@@ -14,8 +14,7 @@ type TableView = ui.View
 
 // NewTableView returns a new table view
 func NewTableView() *TableView {
-	var view *TableView = ui.NewView("table")
-	return view
+	return ui.NewView("table")
 }
 
 const dots = "..."

cointop/table_header.go

@@ -128,8 +128,7 @@ type TableHeaderView = ui.View
 
 // NewTableHeaderView returns a new table header view
 func NewTableHeaderView() *TableHeaderView {
-	var view *TableHeaderView = ui.NewView("table_header")
-	return view
+	return ui.NewView("table_header")
 }
 
 // GetActiveTableHeaders returns the list of active table headers

pkg/api/impl/coingecko/coingecko.go

@@ -37,10 +37,10 @@ type Service struct {
 
 // NewCoinGecko new service
 func NewCoinGecko(config *Config) *Service {
-	var maxResultsPerPage uint = 250 // absolute max
-	var maxResults uint = 0
-	var maxPages uint = 10
-	var perPage uint = 100
+	maxResultsPerPage := 250 // absolute max
+	maxResults := uint(0)
+	maxPages := uint(10)
+	perPage := uint(100)
 	if config.PerPage > 0 {
 		perPage = config.PerPage
 	}

pkg/levenshtein/levenshtein.go

@@ -45,7 +45,7 @@ func DamerauLevenshteinDistance(s1, s2 string) int {
 
 // min returns the minimum number of passed int slices.
 func min(is ...int) int {
-	min := int(math.MaxInt32)
+	min := math.MaxInt32
 	for _, v := range is {
 		if min > v {
 			min = v

pkg/table/align/align.go

@@ -8,8 +8,8 @@ import (
 	"github.com/acarl005/stripansi"
 )
 
-// AlignLeft align left
-func AlignLeft(t string, n int) string {
+// Left align left
+func Left(t string, n int) string {
 	s := stripansi.Strip(t)
 	slen := utf8.RuneCountInString(s)
 	if slen > n {
@@ -19,8 +19,8 @@ func AlignLeft(t string, n int) string {
 	return fmt.Sprintf("%s%s", t, strings.Repeat(" ", n-slen))
 }
 
-// AlignRight align right
-func AlignRight(t string, n int) string {
+// Right align right
+func Right(t string, n int) string {
 	s := stripansi.Strip(t)
 	slen := utf8.RuneCountInString(s)
 	if slen > n {
@@ -30,8 +30,8 @@ func AlignRight(t string, n int) string {
 	return fmt.Sprintf("%s%s", strings.Repeat(" ", n-slen), t)
 }
 
-// AlignCenter align center
-func AlignCenter(t string, n int) string {
+// Center align center
+func Center(t string, n int) string {
 	s := stripansi.Strip(t)
 	slen := utf8.RuneCountInString(s)
 	if slen > n {

pkg/table/table.go

@@ -205,11 +205,11 @@ func (t *Table) Fprint(w io.Writer) {
 			var s string
 			switch c.align {
 			case AlignLeft:
-				s = align.AlignLeft(c.name+" ", c.width)
+				s = align.Left(c.name+" ", c.width)
 			case AlignRight:
-				s = align.AlignRight(c.name+" ", c.width)
+				s = align.Right(c.name+" ", c.width)
 			case AlignCenter:
-				s = align.AlignCenter(c.name+" ", c.width)
+				s = align.Center(c.name+" ", c.width)
 			}
 
 			fmt.Fprintf(w, "%s", s)
@@ -237,11 +237,11 @@ func (t *Table) Fprint(w io.Writer) {
 			var s string
 			switch c.align {
 			case AlignLeft:
-				s = align.AlignLeft(v, c.width)
+				s = align.Left(v, c.width)
 			case AlignRight:
-				s = align.AlignRight(v, c.width)
+				s = align.Right(v, c.width)
 			case AlignCenter:
-				s = align.AlignCenter(v, c.width)
+				s = align.Center(v, c.width)
 			}
 
 			fmt.Fprintf(w, "%s", s)

pkg/termui/gauge.go

@@ -21,7 +21,7 @@ import (
   g.PercentColor = termui.ColorBlue
 */
 
-const ColorUndef Attribute = Attribute(^uint16(0))
+const ColorUndef = Attribute(^uint16(0))
 
 type Gauge struct {
 	Block