How to use Swap method of td Package

Best Go-testdeep code snippet using td.Swap

safe_format.go

Source:safe_format.go Github

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...282 formatSafeIndex(w, md.Index, m)283 case *descpb.DescriptorMutation_Column:284 w.Printf(", Column: ")285 formatSafeColumn(w, md.Column, m)286 case *descpb.DescriptorMutation_PrimaryKeySwap:287 w.Printf(", PrimaryKeySwap: {")288 w.Printf("OldPrimaryIndexID: %d", md.PrimaryKeySwap.OldPrimaryIndexId)289 w.Printf(", OldIndexes: ")290 formatSafeIndexIDs(w, md.PrimaryKeySwap.NewIndexes)291 w.Printf(", NewPrimaryIndexID: %d", md.PrimaryKeySwap.NewPrimaryIndexId)292 w.Printf(", NewIndexes: ")293 formatSafeIndexIDs(w, md.PrimaryKeySwap.NewIndexes)294 w.Printf("}")295 case *descpb.DescriptorMutation_ComputedColumnSwap:296 w.Printf(", ComputedColumnSwap: {OldColumnID: %d, NewColumnID: %d}",297 md.ComputedColumnSwap.OldColumnId, md.ComputedColumnSwap.NewColumnId)298 case *descpb.DescriptorMutation_MaterializedViewRefresh:299 w.Printf(", MaterializedViewRefresh: {")300 w.Printf("NewPrimaryIndex: ")301 formatSafeIndex(w, &md.MaterializedViewRefresh.NewPrimaryIndex, m)302 w.Printf(", NewIndexes: [")303 for i := range md.MaterializedViewRefresh.NewIndexes {304 if i > 0 {305 w.Printf(", ")306 }307 formatSafeIndex(w, &md.MaterializedViewRefresh.NewIndexes[i], m)308 }309 w.Printf("]")310 w.Printf(", AsOf: %s, ShouldBackfill: %b",311 md.MaterializedViewRefresh.AsOf, md.MaterializedViewRefresh.ShouldBackfill)...

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timer.go

Source:timer.go Github

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1package time2import (3 "sync"4 itime "time"5 "go-common/library/log"6)7const (8 timerFormat = "2006-01-02 15:04:05"9 infiniteDuration = itime.Duration(1<<63 - 1)10)11var (12 timerLazyDelay = 300 * itime.Millisecond13)14// TimerData timer data.15type TimerData struct {16 Key string17 expire itime.Time18 fn func()19 index int20 next *TimerData21}22// Delay delay duration.23func (td *TimerData) Delay() itime.Duration {24 return td.expire.Sub(itime.Now())25}26// ExpireString expire string.27func (td *TimerData) ExpireString() string {28 return td.expire.Format(timerFormat)29}30// Timer timer.31type Timer struct {32 lock sync.Mutex33 free *TimerData34 timers []*TimerData35 signal *itime.Timer36 num int37}38// NewTimer new a timer.39// A heap must be initialized before any of the heap operations40// can be used. Init is idempotent with respect to the heap invariants41// and may be called whenever the heap invariants may have been invalidated.42// Its complexity is O(n) where n = h.Len().43//44func NewTimer(num int) (t *Timer) {45 t = new(Timer)46 t.init(num)47 return t48}49// Init init the timer.50func (t *Timer) Init(num int) {51 t.init(num)52}53func (t *Timer) init(num int) {54 t.signal = itime.NewTimer(infiniteDuration)55 t.timers = make([]*TimerData, 0, num)56 t.num = num57 t.grow()58 go t.start()59}60func (t *Timer) grow() {61 var (62 i int63 td *TimerData64 tds = make([]TimerData, t.num)65 )66 t.free = &(tds[0])67 td = t.free68 for i = 1; i < t.num; i++ {69 td.next = &(tds[i])70 td = td.next71 }72 td.next = nil73}74// get get a free timer data.75func (t *Timer) get() (td *TimerData) {76 if td = t.free; td == nil {77 t.grow()78 td = t.free79 }80 t.free = td.next81 return82}83// put put back a timer data.84func (t *Timer) put(td *TimerData) {85 td.fn = nil86 td.next = t.free87 t.free = td88}89// Add add the element x onto the heap. The complexity is90// O(log(n)) where n = h.Len().91func (t *Timer) Add(expire itime.Duration, fn func()) (td *TimerData) {92 t.lock.Lock()93 td = t.get()94 td.expire = itime.Now().Add(expire)95 td.fn = fn96 t.add(td)97 t.lock.Unlock()98 return99}100// Del removes the element at index i from the heap.101// The complexity is O(log(n)) where n = h.Len().102func (t *Timer) Del(td *TimerData) {103 t.lock.Lock()104 t.del(td)105 t.put(td)106 t.lock.Unlock()107}108// Push pushes the element x onto the heap. The complexity is109// O(log(n)) where n = h.Len().110func (t *Timer) add(td *TimerData) {111 var d itime.Duration112 td.index = len(t.timers)113 // add to the minheap last node114 t.timers = append(t.timers, td)115 t.up(td.index)116 if td.index == 0 {117 // if first node, signal start goroutine118 d = td.Delay()119 t.signal.Reset(d)120 if Debug {121 log.Info("timer: add reset delay %d ms", int64(d)/int64(itime.Millisecond))122 }123 }124 if Debug {125 log.Info("timer: push item key: %s, expire: %s, index: %d", td.Key, td.ExpireString(), td.index)126 }127}128func (t *Timer) del(td *TimerData) {129 var (130 i = td.index131 last = len(t.timers) - 1132 )133 if i < 0 || i > last || t.timers[i] != td {134 // already remove, usually by expire135 if Debug {136 log.Info("timer del i: %d, last: %d, %p", i, last, td)137 }138 return139 }140 if i != last {141 t.swap(i, last)142 t.down(i, last)143 t.up(i)144 }145 // remove item is the last node146 t.timers[last].index = -1 // for safety147 t.timers = t.timers[:last]148 if Debug {149 log.Info("timer: remove item key: %s, expire: %s, index: %d", td.Key, td.ExpireString(), td.index)150 }151}152// Set update timer data.153func (t *Timer) Set(td *TimerData, expire itime.Duration) {154 t.lock.Lock()155 t.del(td)156 td.expire = itime.Now().Add(expire)157 t.add(td)158 t.lock.Unlock()159}160// start start the timer.161func (t *Timer) start() {162 for {163 t.expire()164 <-t.signal.C165 }166}167// expire removes the minimum element (according to Less) from the heap.168// The complexity is O(log(n)) where n = max.169// It is equivalent to Del(0).170func (t *Timer) expire() {171 var (172 fn func()173 td *TimerData174 d itime.Duration175 )176 t.lock.Lock()177 for {178 if len(t.timers) == 0 {179 d = infiniteDuration180 if Debug {181 log.Info("timer: no other instance")182 }183 break184 }185 td = t.timers[0]186 if d = td.Delay(); d > 0 {187 break188 }189 fn = td.fn190 // let caller put back191 t.del(td)192 t.lock.Unlock()193 if fn == nil {194 log.Warn("expire timer no fn")195 } else {196 if Debug {197 log.Info("timer key: %s, expire: %s, index: %d expired, call fn", td.Key, td.ExpireString(), td.index)198 }199 fn()200 }201 t.lock.Lock()202 }203 t.signal.Reset(d)204 if Debug {205 log.Info("timer: expier reset delay %d ms", int64(d)/int64(itime.Millisecond))206 }207 t.lock.Unlock()208}209func (t *Timer) up(j int) {210 for {211 i := (j - 1) / 2 // parent212 if i <= j || !t.less(j, i) {213 break214 }215 t.swap(i, j)216 j = i217 }218}219func (t *Timer) down(i, n int) {220 for {221 j1 := 2*i + 1222 if j1 >= n || j1 < 0 { // j1 < 0 after int overflow223 break224 }225 j := j1 // left child226 if j2 := j1 + 1; j2 < n && !t.less(j1, j2) {227 j = j2 // = 2*i + 2 // right child228 }229 if !t.less(j, i) {230 break231 }232 t.swap(i, j)233 i = j234 }235}236func (t *Timer) less(i, j int) bool {237 return t.timers[i].expire.Before(t.timers[j].expire)238}239func (t *Timer) swap(i, j int) {240 t.timers[i], t.timers[j] = t.timers[j], t.timers[i]241 t.timers[i].index = i242 t.timers[j].index = j243}...

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Swap

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1import "fmt"2type td struct {3}4func (t *td) Swap() {5}6func main() {7 t := td{1, 2}8 t.Swap()9 fmt.Println(t)10}11{2 1}12import (13type Vertex struct {14}15func (v Vertex) Abs() float64 {16 return math.Sqrt(v.X*v.X + v.Y*v.Y)17}18func (v *Vertex) Scale(f float64) {19}20func AbsFunc(v Vertex) float64 {21 return math.Sqrt(v.X*v.X + v.Y*v.Y)22}23func ScaleFunc(v *Vertex, f float64) {

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Swap

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1import "fmt"2type td struct {3}4func main() {5 t := td{a: 10, b: 20}6 fmt.Println(t)7 t.Swap()8 fmt.Println(t)9}10func (t *td) Swap() {11}12{10 20}13{20 10}14import "fmt"15type td struct {16}17func main() {18 t := td{a: 10, b: 20}19 fmt.Println(t)20 t.Swap()21 fmt.Println(t)22}23func (t td) Swap() {24}25{10 20}26{10 20}27import "fmt"28type td struct {29}30func main() {31 t := td{a: 10, b: 20}32 fmt.Println(t)33 t.Swap()34 fmt.Println(t)35}36func (t td) Swap() {37}38{10 20}39{10 20}

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Swap

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1import "fmt"2type td struct {3}4func (t td) swap() td {5 return td{t.y, t.x}6}7func main() {8 t := td{2, 3}9 fmt.Println(t.swap())10}11{3 2}12import "fmt"13type td struct {14}15func (t td) swap() td {16 return td{t.y, t.x}17}18func main() {19 t := td{2, 3}20 fmt.Println(t.swap())21}22{3 2}23import "fmt"24type td struct {25}26func (t td) swap() td {27 return td{t.y, t.x}28}29func main() {30 t := td{2, 3}31 fmt.Println(f(t))32}33{3 2}34import "fmt"35type td struct {36}37func (t td) swap() td {38 return td{t.y, t.x}39}40func main() {41 t := td{2, 3}42 fmt.Println(f(t))43 fmt.Println(t.swap())44}45{3 2}46{3 2}47import "fmt"48type td struct {49}50func (t td) swap() td {51 return td{t.y, t.x}52}53func main() {54 t := td{2, 3}55 fmt.Println(f(t))

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Swap

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1import "fmt"2func main() {3 td1 := td{1, 2}4 td2 := td{3, 4}5 fmt.Println("Before swap: ", td1, td2)6 td1.swap(&td2)7 fmt.Println("After swap: ", td1, td2)8}9import "fmt"10func main() {11 td1 := td{1, 2}12 td2 := td{3, 4}13 fmt.Println("Before swap: ", td1, td2)14 td1.swap(td2)15 fmt.Println("After swap: ", td1, td2)16}17import "fmt"18func main() {19 td1 := td{1, 2}20 td2 := td{3, 4}21 fmt.Println("Before swap: ", td1, td2)22 td1.swap(&td1)23 fmt.Println("After swap: ", td1, td2)24}25import "fmt"26func main() {27 td1 := td{1, 2}28 td2 := td{3, 4}29 fmt.Println("Before swap: ", td1, td2)30 td1.swap(td1)31 fmt.Println("After swap: ", td1, td2)32}33import "fmt"34func main() {35 td1 := td{1,

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Swap

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1import (2func main() {3 td := td{1, 2}4 fmt.Println(td)5 td.swap()6 fmt.Println(td)7}8import (9func main() {10 td := td{1, 2}11 fmt.Println(td)12 td.swap()13 fmt.Println(td)14}15import (16func main() {17 td := td{1, 2}18 fmt.Println(td)19 td.swap()20 fmt.Println(td)21}22import (23func main() {24 td := td{1, 2}25 fmt.Println(td)26 td.swap()27 fmt.Println(td)28}29import (30func main() {31 td := td{1, 2}32 fmt.Println(td)33 td.swap()34 fmt.Println(td)35}36import (37func main() {38 td := td{1, 2}39 fmt.Println(td)40 td.swap()41 fmt.Println(td)42}43import (44func main() {45 td := td{1, 2}46 fmt.Println(td)47 td.swap()48 fmt.Println(td)49}

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Swap

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1import (2func main() {3 g := graph.New(4)4 g.Add(0, 1)5 g.Add(1, 2)6 g.Add(2, 3)7 g.Add(3, 0)8 fmt.Println("Original Graph")9 fmt.Println(g)10 fmt.Println("")11 fmt.Println("Swapping 0 with 1")12 g.Swap(0, 1)13 fmt.Println(g)14 fmt.Println("")15 fmt.Println("Swapping 0 with 1 again")16 g.Swap(0, 1)17 fmt.Println(g)18 fmt.Println("")19 fmt.Println("Swapping 0 with 2")20 g.Swap(0, 2)21 fmt.Println(g)22 fmt.Println("")23 fmt.Println("Swapping 0 with 2 again")24 g.Swap(0, 2)25 fmt.Println(g)26 fmt.Println("")27 fmt.Println("Swapping 1 with 2")28 g.Swap(1, 2)29 fmt.Println(g)30 fmt.Println("")31 fmt.Println("Swapping 1 with 2 again")32 g.Swap(1, 2)33 fmt.Println(g)34 fmt.Println("")35 fmt.Println("Swapping 2 with 3")36 g.Swap(2, 3)37 fmt.Println(g)38 fmt.Println("")39 fmt.Println("Swapping 2 with 3 again")40 g.Swap(2, 3)41 fmt.Println(g)42 fmt.Println("")43}

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Swap

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1import (2func main() {3 fmt.Println("Before swapping a=", a, "b=", b)4 swap(a, b)5 fmt.Println("After swapping a=", a, "b=", b)6}7func swap(x, y int) {8 fmt.Println("Inside swap function a=", x, "b=", y)9}10func swap(x, y *int) {11 fmt.Println("Inside swap function a=", *x, "b=", *y)12}13swap(&a, &b)

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Swap

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1import (2type td struct {3}4func (t td) String() string {5 return fmt.Sprintf("%d", t.d)6}7func main() {8 a := []td{{1}, {2}, {3}, {4}, {5}}9 sort.Slice(a, func(i, j int) bool { return a[i].d < a[j].d })10 fmt.Println(a)11 sort.Slice(a, func(i, j int) bool { return a[i].d > a[j].d })12 fmt.Println(a)13 sort.Slice(a, func(i, j int) bool { return a[i].d < a[j].d })14 fmt.Println(a)15 sort.Slice(a, func(i, j int) bool { return a[i].d > a[j].d })16 fmt.Println(a)17}

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1import (2func main() {3 fmt.Println("Enter two numbers")4 fmt.Scan(&a, &b)5 fmt.Println("Before swapping a = ", a, "b = ", b)6 td.Swap(&a, &b)7 fmt.Println("After swapping a = ", a, "b = ", b)8}9func Swap(a, b *int) {10}

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1import "fmt"2func main(){3fmt.Println("Before swap a is ",a," and b is ",b)4fmt.Println("After swap a is ",a," and b is ",b)5}6import "fmt"7func main(){8fmt.Println("Before swap a is ",a," and b is ",b)9fmt.Println("After swap a is ",a," and b is ",b)10}11import "fmt"12func main(){13fmt.Println("Before swap a is ",a," and b is ",b)14fmt.Println("After swap a is ",a," and b is ",b)15}16import "fmt"17func main(){18fmt.Println("Before swap a is ",a," and b is ",b)19fmt.Println("After swap a is ",a," and b is ",b)20}

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