How to use Less method of order Package

Best Gauge code snippet using order.Less

stat_compare_test.go

Source:stat_compare_test.go Github

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1// Licensed to the Apache Software Foundation (ASF) under one2// or more contributor license agreements. See the NOTICE file3// distributed with this work for additional information4// regarding copyright ownership. The ASF licenses this file5// to you under the Apache License, Version 2.0 (the6// "License"); you may not use this file except in compliance7// with the License. You may obtain a copy of the License at8//9// http://www.apache.org/licenses/LICENSE-2.010//11// Unless required by applicable law or agreed to in writing, software12// distributed under the License is distributed on an "AS IS" BASIS,13// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.14// See the License for the specific language governing permissions and15// limitations under the License.16package metadata17import (18 "encoding/binary"19 "testing"20 "github.com/apache/arrow/go/v9/parquet"21 "github.com/apache/arrow/go/v9/parquet/schema"22 "github.com/stretchr/testify/assert"23 "github.com/stretchr/testify/require"24)25func TestSignedByteArrayCompare(t *testing.T) {26 s := ByteArrayStatistics{27 statistics: statistics{28 order: schema.SortSIGNED,29 },30 }31 // signed byte array comparison is only used for Decimal comparison.32 // when decimals are encoded as byte arrays they use twos compliment33 // big-endian encoded values. Comparisons of byte arrays of unequal34 // types need to handle sign extension.35 tests := []struct {36 b []byte37 order int38 }{39 {[]byte{0x80, 0x80, 0, 0}, 0},40 {[]byte{ /*0xFF,*/ 0x80, 0, 0}, 1},41 {[]byte{0xFF, 0x80, 0, 0}, 1},42 {[]byte{ /*0xFF,*/ 0xFF, 0x01, 0}, 2},43 {[]byte{ /*0xFF, 0xFF,*/ 0x80, 0}, 3},44 {[]byte{ /*0xFF,*/ 0xFF, 0x80, 0}, 3},45 {[]byte{0xFF, 0xFF, 0x80, 0}, 3},46 {[]byte{ /*0xFF,0xFF,0xFF,*/ 0x80}, 4},47 {[]byte{ /*0xFF,0xFF,0xFF*/ 0xFF}, 5},48 {[]byte{ /*0, 0,*/ 0x01, 0x01}, 6},49 {[]byte{ /*0,*/ 0, 0x01, 0x01}, 6},50 {[]byte{0, 0, 0x01, 0x01}, 6},51 {[]byte{ /*0,*/ 0x01, 0x01, 0}, 7},52 {[]byte{0x01, 0x01, 0, 0}, 8},53 }54 for i, tt := range tests {55 // empty array is always the smallest56 assert.Truef(t, s.less(parquet.ByteArray{}, parquet.ByteArray(tt.b)), "case: %d", i)57 assert.Falsef(t, s.less(parquet.ByteArray(tt.b), parquet.ByteArray{}), "case: %d", i)58 // equals is always false59 assert.Falsef(t, s.less(parquet.ByteArray(tt.b), parquet.ByteArray(tt.b)), "case: %d", i)60 for j, case2 := range tests {61 var fn func(assert.TestingT, bool, string, ...interface{}) bool62 if tt.order < case2.order {63 fn = assert.Truef64 } else {65 fn = assert.Falsef66 }67 fn(t, s.less(parquet.ByteArray(tt.b), parquet.ByteArray(case2.b)),68 "%d (order: %d) %d (order: %d)", i, tt.order, j, case2.order)69 }70 }71}72func TestUnsignedByteArrayCompare(t *testing.T) {73 s := ByteArrayStatistics{74 statistics: statistics{75 order: schema.SortUNSIGNED,76 },77 }78 s1ba := parquet.ByteArray("arrange")79 s2ba := parquet.ByteArray("arrangement")80 assert.True(t, s.less(s1ba, s2ba))81 // multi-byte utf-8 characters82 s1ba = parquet.ByteArray("braten")83 s2ba = parquet.ByteArray("bügeln")84 assert.True(t, s.less(s1ba, s2ba))85 s1ba = parquet.ByteArray("ünk123456") // ü = 25286 s2ba = parquet.ByteArray("ănk123456") // ă = 25987 assert.True(t, s.less(s1ba, s2ba))88}89func TestSignedCompareFLBA(t *testing.T) {90 s := FixedLenByteArrayStatistics{91 statistics: statistics{order: schema.SortSIGNED},92 }93 values := []parquet.FixedLenByteArray{94 []byte{0x80, 0, 0, 0},95 []byte{0xFF, 0xFF, 0x01, 0},96 []byte{0xFF, 0xFF, 0x80, 0},97 []byte{0xFF, 0xFF, 0xFF, 0x80},98 []byte{0xFF, 0xFF, 0xFF, 0xFF},99 []byte{0, 0, 0x01, 0x01},100 []byte{0, 0x01, 0x01, 0},101 []byte{0x01, 0x01, 0, 0},102 }103 for i, v := range values {104 assert.Falsef(t, s.less(v, v), "%d", i)105 for j, v2 := range values[i+1:] {106 assert.Truef(t, s.less(v, v2), "%d %d", i, j)107 assert.Falsef(t, s.less(v2, v), "%d %d", j, i)108 }109 }110}111func TestUnsignedCompareFLBA(t *testing.T) {112 s := FixedLenByteArrayStatistics{113 statistics: statistics{order: schema.SortUNSIGNED},114 }115 s1flba := parquet.FixedLenByteArray("Anti123456")116 s2flba := parquet.FixedLenByteArray("Bunkd123456")117 assert.True(t, s.less(s1flba, s2flba))118 s1flba = parquet.FixedLenByteArray("Bunk123456")119 s2flba = parquet.FixedLenByteArray("Bünk123456")120 assert.True(t, s.less(s1flba, s2flba))121}122func TestSignedCompareInt96(t *testing.T) {123 s := Int96Statistics{124 statistics: statistics{order: schema.SortSIGNED},125 }126 val := -14127 var (128 a = parquet.NewInt96([3]uint32{1, 41, 14})129 b = parquet.NewInt96([3]uint32{1, 41, 42})130 aa = parquet.NewInt96([3]uint32{1, 41, 14})131 bb = parquet.NewInt96([3]uint32{1, 41, 14})132 aaa = parquet.NewInt96([3]uint32{1, 41, uint32(val)})133 bbb = parquet.NewInt96([3]uint32{1, 41, 42})134 )135 assert.True(t, s.less(a, b))136 assert.True(t, !s.less(aa, bb) && !s.less(bb, aa))137 assert.True(t, s.less(aaa, bbb))138}139func TestUnsignedCompareInt96(t *testing.T) {140 s := Int96Statistics{141 statistics: statistics{order: schema.SortUNSIGNED},142 }143 valb := -41144 valbb := -14145 var (146 a = parquet.NewInt96([3]uint32{1, 41, 14})147 b = parquet.NewInt96([3]uint32{1, uint32(valb), 42})148 aa = parquet.NewInt96([3]uint32{1, 41, 14})149 bb = parquet.NewInt96([3]uint32{1, 41, uint32(valbb)})150 aaa parquet.Int96151 bbb parquet.Int96152 )153 assert.True(t, s.less(a, b))154 assert.True(t, s.less(aa, bb))155 binary.LittleEndian.PutUint32(aaa[8:], 2451545) // 2000-01-01156 binary.LittleEndian.PutUint32(bbb[8:], 2451546) // 2000-01-02157 // 12 hours + 34 minutes + 56 seconds158 aaa.SetNanoSeconds(45296000000000)159 // 12 hours + 34 minutes + 50 seconds160 bbb.SetNanoSeconds(45290000000000)161 assert.True(t, s.less(aaa, bbb))162 binary.LittleEndian.PutUint32(aaa[8:], 2451545) // 2000-01-01163 binary.LittleEndian.PutUint32(bbb[8:], 2451545) // 2000-01-01164 // 11 hours + 34 minutes + 56 seconds165 aaa.SetNanoSeconds(41696000000000)166 // 12 hours + 34 minutes + 50 seconds167 bbb.SetNanoSeconds(45290000000000)168 assert.True(t, s.less(aaa, bbb))169 binary.LittleEndian.PutUint32(aaa[8:], 2451545) // 2000-01-01170 binary.LittleEndian.PutUint32(bbb[8:], 2451545) // 2000-01-01171 // 12 hours + 34 minutes + 55 seconds172 aaa.SetNanoSeconds(45295000000000)173 // 12 hours + 34 minutes + 56 seconds174 bbb.SetNanoSeconds(45296000000000)175 assert.True(t, s.less(aaa, bbb))176}177func TestCompareSignedInt64(t *testing.T) {178 var (179 a int64 = 1180 b int64 = 4181 aa int64 = 1182 bb int64 = 1183 aaa int64 = -1184 bbb int64 = 1185 )186 n := schema.NewInt64Node("signedint64", parquet.Repetitions.Required, -1)187 descr := schema.NewColumn(n, 0, 0)188 s := NewStatistics(descr, nil).(*Int64Statistics)189 assert.True(t, s.less(a, b))190 assert.True(t, !s.less(aa, bb) && !s.less(bb, aa))191 assert.True(t, s.less(aaa, bbb))192}193func TestCompareUnsignedInt64(t *testing.T) {194 var (195 a int64 = 1196 b int64 = 4197 aa int64 = 1198 bb int64 = 1199 aaa int64 = 1200 bbb int64 = -1201 )202 n, err := schema.NewPrimitiveNodeConverted("unsigned int64", parquet.Repetitions.Required, parquet.Types.Int64, schema.ConvertedTypes.Uint64, 0, 0, 0, 0)203 require.NoError(t, err)204 descr := schema.NewColumn(n, 0, 0)205 assert.Equal(t, schema.SortUNSIGNED, descr.SortOrder())206 s := NewStatistics(descr, nil).(*Int64Statistics)207 assert.True(t, s.less(a, b))208 assert.True(t, !s.less(aa, bb) && !s.less(bb, aa))209 assert.True(t, s.less(aaa, bbb))210}211func TestCompareUnsignedInt32(t *testing.T) {212 var (213 a int32 = 1214 b int32 = 4215 aa int32 = 1216 bb int32 = 1217 aaa int32 = 1218 bbb int32 = -1219 )220 n, err := schema.NewPrimitiveNodeConverted("unsigned int32", parquet.Repetitions.Required, parquet.Types.Int32, schema.ConvertedTypes.Uint32, 0, 0, 0, 0)221 require.NoError(t, err)222 descr := schema.NewColumn(n, 0, 0)223 assert.Equal(t, schema.SortUNSIGNED, descr.SortOrder())224 s := NewStatistics(descr, nil).(*Int32Statistics)225 assert.True(t, s.less(a, b))226 assert.True(t, !s.less(aa, bb) && !s.less(bb, aa))227 assert.True(t, s.less(aaa, bbb))228}...

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bytes_test.go

Source:bytes_test.go Github

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...22 panic(err)23 }24 return bytes25}26func sortForTest(inputData []val, lessFunc extsort.CompareLessFunc) error {27 // make array of all data in chan28 inputChan := make(chan extsort.SortType, 2)29 go func() {30 for _, d := range inputData {31 inputChan <- d32 }33 close(inputChan)34 }()35 config := extsort.DefaultConfig()36 config.ChunkSize = len(inputData)/20 + 10037 sort, outChan, errChan := extsort.New(inputChan, fromBytesForTest, lessFunc, config)38 sort.Sort(context.Background())39 i := 040 for rec := range outChan {41 inputData[i] = rec.(val)42 i++43 }44 if err := <-errChan; err != nil {45 return err46 }47 return nil48}49type val struct {50 Key, Order int51}52func makeTestArray(size int) []val {53 a := make([]val, size)54 for i := 0; i < size; i++ {55 a[i] = val{i & 0xeeeeee, i}56 }57 return a58}59func IsSorted(a []val, lessThan extsort.CompareLessFunc) bool {60 len := len(a)61 if len < 2 {62 return true63 }64 prev := a[0]65 for i := 1; i < len; i++ {66 if lessThan(a[i], prev) {67 return false68 }69 prev = a[i]70 }71 return true72}73func TestIsSorted(t *testing.T) {74 a := make([]val, 5)75 a[0] = val{3, 1}76 a[1] = val{1, 5}77 a[2] = val{2, 3}78 a[3] = val{3, 4}79 a[4] = val{4, 5}80 if IsSorted(a, OrderLessThan) {81 t.Error("Sorted")82 }83}84// use this comparator for sorting85func KeyLessThan(a, b extsort.SortType) bool {86 return a.(val).Key < b.(val).Key87}88// use this comparator to validate sorted data (and prove its stable)89func KeyOrderLessThan(ar, br extsort.SortType) bool {90 a := ar.(val)91 b := br.(val)92 if a.Key < b.Key {93 return true94 } else if a.Key == b.Key {95 return a.Order < b.Order96 }97 return false98}99// use this comparator to restore the original order of elements (by sorting on order field)100func OrderLessThan(a, b extsort.SortType) bool {101 return a.(val).Order < b.(val).Order102}103func Test50(t *testing.T) {104 a := makeTestArray(50)105 if IsSorted(a, KeyLessThan) {106 t.Error("sorted before starting")107 }108 err := sortForTest(a, KeyLessThan)109 if err != nil {110 t.Fatalf("sort: %v", err)111 }112 if !IsSorted(a, KeyLessThan) {113 t.Error("not sorted")114 }115}116func TestSmoke(t *testing.T) {117 a := make([]val, 3)118 a[0] = val{3, 0}119 a[1] = val{1, 1}120 a[2] = val{2, 2}121 err := sortForTest(a, KeyLessThan)122 if err != nil {123 t.Fatalf("sort: %v", err)124 }125 if !IsSorted(a, KeyLessThan) {126 t.Error("not sorted")127 }128}129func TestSmokeStability(t *testing.T) {130 a := make([]val, 3)131 a[0] = val{3, 0}132 a[1] = val{2, 1}133 a[2] = val{2, 2}134 err := sortForTest(a, KeyOrderLessThan)135 if err != nil {136 t.Fatalf("sort: %v", err)137 }138 if !IsSorted(a, KeyOrderLessThan) {139 t.Error("not sorted")140 }141}142func Test1K(t *testing.T) {143 a := makeTestArray(1024)144 err := sortForTest(a, KeyOrderLessThan)145 if err != nil {146 t.Fatalf("sort: %v", err)147 }148 if !IsSorted(a, KeyOrderLessThan) {149 t.Error("not sorted")150 }151}152func Test1M(t *testing.T) {153 a := makeTestArray(1024 * 1024)154 err := sortForTest(a, KeyOrderLessThan)155 if err != nil {156 t.Fatalf("sort: %v", err)157 }158 if !IsSorted(a, KeyOrderLessThan) {159 t.Error("not sorted")160 }161}162func makeRandomArray(size int) []val {163 a := make([]val, size)164 for i := 0; i < size; i++ {165 a[i] = val{rand.Intn(100), i}166 }167 return a168}169func Equals(a, b val) bool {170 return a.Key == b.Key && a.Order == b.Order171}172func TestRandom1M(t *testing.T) {173 size := 1024 * 1024174 a := makeRandomArray(size)175 b := make([]val, size)176 copy(b, a)177 err := sortForTest(a, KeyLessThan)178 if err != nil {179 t.Fatalf("sort: %v", err)180 }181 if !IsSorted(a, KeyLessThan) {182 t.Error("not sorted")183 }184 // sort by order185 err = sortForTest(a, OrderLessThan)186 if err != nil {187 t.Fatalf("sort: %v", err)188 }189 for i := 0; i < len(b); i++ {190 if !Equals(b[i], a[i]) {191 t.Error("oops")192 }193 }194}...

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bytes_mock_test.go

Source:bytes_mock_test.go Github

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...5 "context"6 "testing"7 "github.com/lanrat/extsort"8)9func sortForMockTest(inputData []val, lessFunc extsort.CompareLessFunc) error {10 // make array of all data in chan11 inputChan := make(chan extsort.SortType, 2)12 go func() {13 for _, d := range inputData {14 inputChan <- d15 }16 close(inputChan)17 }()18 config := extsort.DefaultConfig()19 config.ChunkSize = len(inputData)/20 + 10020 sort, outChan, errChan := extsort.NewMock(inputChan, fromBytesForTest, lessFunc, config, 0)21 sort.Sort(context.Background())22 i := 023 for rec := range outChan {24 inputData[i] = rec.(val)25 i++26 }27 if err := <-errChan; err != nil {28 return err29 }30 return nil31}32func TestMock50(t *testing.T) {33 a := makeTestArray(50)34 if IsSorted(a, KeyLessThan) {35 t.Error("sorted before starting")36 }37 err := sortForMockTest(a, KeyLessThan)38 if err != nil {39 t.Fatalf("sort: %v", err)40 }41 if !IsSorted(a, KeyLessThan) {42 t.Error("not sorted")43 }44}45func TestMockSmoke(t *testing.T) {46 a := make([]val, 3)47 a[0] = val{3, 0}48 a[1] = val{1, 1}49 a[2] = val{2, 2}50 err := sortForMockTest(a, KeyLessThan)51 if err != nil {52 t.Fatalf("sort: %v", err)53 }54 if !IsSorted(a, KeyLessThan) {55 t.Error("not sorted")56 }57}58func TestMockSmokeStability(t *testing.T) {59 a := make([]val, 3)60 a[0] = val{3, 0}61 a[1] = val{2, 1}62 a[2] = val{2, 2}63 err := sortForMockTest(a, KeyOrderLessThan)64 if err != nil {65 t.Fatalf("sort: %v", err)66 }67 if !IsSorted(a, KeyOrderLessThan) {68 t.Error("not sorted")69 }70}71func TestMock1K(t *testing.T) {72 a := makeTestArray(1024)73 err := sortForMockTest(a, KeyOrderLessThan)74 if err != nil {75 t.Fatalf("sort: %v", err)76 }77 if !IsSorted(a, KeyOrderLessThan) {78 t.Error("not sorted")79 }80}81func TestMock1M(t *testing.T) {82 a := makeTestArray(1024 * 1024)83 err := sortForMockTest(a, KeyOrderLessThan)84 if err != nil {85 t.Fatalf("sort: %v", err)86 }87 if !IsSorted(a, KeyOrderLessThan) {88 t.Error("not sorted")89 }90}91func TestMockRandom1M(t *testing.T) {92 size := 1024 * 102493 a := makeRandomArray(size)94 b := make([]val, size)95 copy(b, a)96 err := sortForMockTest(a, KeyLessThan)97 if err != nil {98 t.Fatalf("sort: %v", err)99 }100 if !IsSorted(a, KeyLessThan) {101 t.Error("not sorted")102 }103 // sort by order104 err = sortForTest(a, OrderLessThan)105 if err != nil {106 t.Fatalf("sort: %v", err)107 }108 for i := 0; i < len(b); i++ {109 if !Equals(b[i], a[i]) {110 t.Error("oops")111 }112 }113}...

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11.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:2order does not implement sort.Interface (missing Len method)31.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:4order does not implement sort.Interface (missing Less method)51.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:6order does not implement sort.Interface (missing Swap method)71.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:8order does not implement sort.Interface (missing Len method)91.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:10order does not implement sort.Interface (missing Less method)111.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:12order does not implement sort.Interface (missing Swap method)131.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:14order does not implement sort.Interface (missing Len method)151.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:16order does not implement sort.Interface (missing Less method)171.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:18order does not implement sort.Interface (missing Swap method)191.go:4: cannot use order literal (type order) as type sort.Interface in argument to sort.Sort:20order does not implement sort.Interface (missing Len method)211.go:4: cannot use order literal (type order)

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1import (2type order struct {3}4func (o byId) Len() int {5 return len(o)6}7func (o byId) Less(i, j int) bool {8}9func (o byId) Swap(i, j int) {10}11func main() {12 orders := []order{13 {ordId: 456, customerId: 56},14 {ordId: 768, customerId: 19},15 {ordId: 234, customerId: 34},16 {ordId: 890, customerId: 12},17 {ordId: 123, customerId: 23},18 }19 sort.Sort(byId(orders))20 fmt.Println(orders)21}22[{123 23} {234 34} {456 56} {768 19} {890 12}]23import (24type customer struct {25}26func (c byName) Len() int {27 return len(c)28}29func (c byName) Less(i, j int) bool {30}31func (c byName) Swap(i, j int) {32}33func main() {34 customers := []customer{35 {custId: 56, customerName: "James"},36 {custId: 19, customerName: "Andy"},37 {custId: 34, customerName: "Peter"},38 {custId: 12, customerName: "Mark"},39 {custId: 23, customerName: "Ricky"},40 }41 sort.Sort(byName(customers))42 fmt.Println(customers)43}44[{12 Mark} {19 Andy} {56 James} {23 Ricky} {34 Peter}]45import (

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1import (2type order struct {3}4func (o byId) Len() int {5 return len(o)6}7func (o byId) Less(i, j int) bool {8}9func (o byId) Swap(i, j int) {10}11func main() {12 ords := byId{13 {3, 9},14 {1, 2},15 {2, 4},16 {4, 8},17 }18 sort.Sort(ords)19 fmt.Println(ords)20}21[{1 2} {2 4} {3 9} {4 8}]

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1import "fmt"2type Order struct {3}4func (o Order) Less(other Order) bool {5}6func main() {7 o1 := Order{price: 100}8 o2 := Order{price: 200}9 fmt.Println(o1.Less(o2))10}

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1import (2func main() {3 strs := []string{"c", "a", "b"}4 sort.Strings(strs)5 fmt.Println("Strings:", strs)6 ints := []int{7, 2, 4}7 sort.Ints(ints)8 fmt.Println("Ints: ", ints)9 s := []float64{7.0, 2.0, 4.0}10 sort.Float64s(s)11 fmt.Println("Floats: ", s)12 sorted := sort.Float64sAreSorted(s)13 fmt.Println("Sorted: ", sorted)14}15import (16type Person struct {17}18func (p ByName) Len() int {19 return len(p)20}21func (p ByName) Less(i, j int) bool {22}23func (p ByName) Swap(i, j int) {24}25func main() {26 kids := []Person{27 {"Jill", 9},28 {"Jack", 10},29 }30 sort.Sort(ByName(kids))31 fmt.Println(kids)32}33[{Jack 10} {Jill 9}]34import (

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1import (2type Order struct {3}4func (o Order) String() string {5 return fmt.Sprintf("%d %.2f", o.Id, o.Price)6}7func (o Order) Less(other Order) bool {8}9func main() {10 orders := []Order{11 {1, 100},12 {2, 50},13 {3, 10},14 }15 fmt.Println(orders)16 sort.Sort(OrderSlice(orders))17 fmt.Println(orders)18}19import (20type Order struct {21}22func (o Order) String() string {23 return fmt.Sprintf("%d %.2f", o.Id, o.Price)24}25func (o Order) Less(other Order) bool {26}27func main() {28 orders := []Order{29 {1, 100},30 {2, 50},31 {3, 10},32 }33 fmt.Println(orders)34 sort.Sort(OrderSlice(orders))35 fmt.Println(orders)36}37import (38type Order struct {39}40func (o Order) String() string {41 return fmt.Sprintf("%d %.2f", o.Id, o.Price)42}43func (o Order) Less(other Order) bool {44}45func main() {46 orders := []Order{47 {1, 100},48 {2, 50},49 {3, 10},50 }

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1import (2type Order struct {3}4func (o Order) Less(i interface{}) bool {5 return o.Price < i.(Order).Price6}7func (o Order) Greater(i interface{}) bool {8 return o.Price > i.(Order).Price9}10func main() {11 orders := []Order{12 {Price: 100},13 {Price: 10},14 {Price: 1000},15 {Price: 500},16 {Price: 10000},17 {Price: 200},18 }19 fmt.Println("Before sorting")20 for _, o := range orders {21 fmt.Println(o)22 }23 sort.Sort(sort.Reverse(sortableOrders(orders)))24 fmt.Println("After sorting")25 for _, o := range orders {26 fmt.Println(o)27 }28}29{100}30{10}31{1000}32{500}33{10000}34{200}35{10000}36{1000}37{500}38{200}39{100}40{10}

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1import "fmt"2func main() {3 fmt.Println("Hello, World!")4}5import "fmt"6func init() {7 fmt.Println("init function is called")8}9func main() {10 fmt.Println("main function is called")11}12import "package path"13import "fmt"14func main() {15 fmt.Println("Hello, World!")16}17To import a single package, use the following syntax:18import "package path"19import "fmt"20func main() {21 fmt.Println("Hello, World!")22}

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1import (2func main() {3 order := Order{4 }5 order1 := Order{6 }7 order2 := Order{8 }9 order3 := Order{10 }11 order4 := Order{12 }13 order5 := Order{14 }15 order6 := Order{16 }17 order7 := Order{18 }19 order8 := Order{20 }21 order9 := Order{22 }23 order10 := Order{24 }25 order11 := Order{26 }27 order12 := Order{28 }29 order13 := Order{30 }31 order14 := Order{32 }

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