How to use Kind method of html Package

Best K6 code snippet using html.Kind

funcs.go

Source:funcs.go Github

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...50// addValueFuncs adds to values the functions in funcs, converting them to reflect.Values.51func addValueFuncs(out map[string]reflect.Value, in FuncMap) {52 for name, fn := range in {53 v := reflect.ValueOf(fn)54 if v.Kind() != reflect.Func {55 panic("value for " + name + " not a function")56 }57 if !goodFunc(v.Type()) {58 panic(fmt.Errorf("can't install method/function %q with %d results", name, v.Type().NumOut()))59 }60 out[name] = v61 }62}63// addFuncs adds to values the functions in funcs. It does no checking of the input -64// call addValueFuncs first.65func addFuncs(out, in FuncMap) {66 for name, fn := range in {67 out[name] = fn68 }69}70// goodFunc checks that the function or method has the right result signature.71func goodFunc(typ reflect.Type) bool {72 // We allow functions with 1 result or 2 results where the second is an error.73 switch {74 case typ.NumOut() == 1:75 return true76 case typ.NumOut() == 2 && typ.Out(1) == errorType:77 return true78 }79 return false80}81// findFunction looks for a function in the template, and global map.82func findFunction(name string, tmpl *Template) (reflect.Value, bool) {83 if tmpl != nil && tmpl.common != nil {84 tmpl.muFuncs.RLock()85 defer tmpl.muFuncs.RUnlock()86 if fn := tmpl.execFuncs[name]; fn.IsValid() {87 return fn, true88 }89 }90 if fn := builtinFuncs[name]; fn.IsValid() {91 return fn, true92 }93 return reflect.Value{}, false94}95// Indexing.96// index returns the result of indexing its first argument by the following97// arguments. Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each98// indexed item must be a map, slice, or array.99func index(item interface{}, indices ...interface{}) (interface{}, error) {100 v := reflect.ValueOf(item)101 for _, i := range indices {102 index := reflect.ValueOf(i)103 var isNil bool104 if v, isNil = indirect(v); isNil {105 return nil, fmt.Errorf("index of nil pointer")106 }107 switch v.Kind() {108 case reflect.Array, reflect.Slice, reflect.String:109 var x int64110 switch index.Kind() {111 case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:112 x = index.Int()113 case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:114 x = int64(index.Uint())115 default:116 return nil, fmt.Errorf("cannot index slice/array with type %s", index.Type())117 }118 if x < 0 || x >= int64(v.Len()) {119 return nil, fmt.Errorf("index out of range: %d", x)120 }121 v = v.Index(int(x))122 case reflect.Map:123 if !index.IsValid() {124 index = reflect.Zero(v.Type().Key())125 }126 if !index.Type().AssignableTo(v.Type().Key()) {127 return nil, fmt.Errorf("%s is not index type for %s", index.Type(), v.Type())128 }129 if x := v.MapIndex(index); x.IsValid() {130 v = x131 } else {132 v = reflect.Zero(v.Type().Elem())133 }134 default:135 return nil, fmt.Errorf("can't index item of type %s", v.Type())136 }137 }138 return v.Interface(), nil139}140// Length141// length returns the length of the item, with an error if it has no defined length.142func length(item interface{}) (int, error) {143 v, isNil := indirect(reflect.ValueOf(item))144 if isNil {145 return 0, fmt.Errorf("len of nil pointer")146 }147 switch v.Kind() {148 case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice, reflect.String:149 return v.Len(), nil150 }151 return 0, fmt.Errorf("len of type %s", v.Type())152}153// Function invocation154// call returns the result of evaluating the first argument as a function.155// The function must return 1 result, or 2 results, the second of which is an error.156func call(fn interface{}, args ...interface{}) (interface{}, error) {157 v := reflect.ValueOf(fn)158 typ := v.Type()159 if typ.Kind() != reflect.Func {160 return nil, fmt.Errorf("non-function of type %s", typ)161 }162 if !goodFunc(typ) {163 return nil, fmt.Errorf("function called with %d args; should be 1 or 2", typ.NumOut())164 }165 numIn := typ.NumIn()166 var dddType reflect.Type167 if typ.IsVariadic() {168 if len(args) < numIn-1 {169 return nil, fmt.Errorf("wrong number of args: got %d want at least %d", len(args), numIn-1)170 }171 dddType = typ.In(numIn - 1).Elem()172 } else {173 if len(args) != numIn {174 return nil, fmt.Errorf("wrong number of args: got %d want %d", len(args), numIn)175 }176 }177 argv := make([]reflect.Value, len(args))178 for i, arg := range args {179 value := reflect.ValueOf(arg)180 // Compute the expected type. Clumsy because of variadics.181 var argType reflect.Type182 if !typ.IsVariadic() || i < numIn-1 {183 argType = typ.In(i)184 } else {185 argType = dddType186 }187 if !value.IsValid() && canBeNil(argType) {188 value = reflect.Zero(argType)189 }190 if !value.Type().AssignableTo(argType) {191 return nil, fmt.Errorf("arg %d has type %s; should be %s", i, value.Type(), argType)192 }193 argv[i] = value194 }195 result := v.Call(argv)196 if len(result) == 2 && !result[1].IsNil() {197 return result[0].Interface(), result[1].Interface().(error)198 }199 return result[0].Interface(), nil200}201// Boolean logic.202func truth(a interface{}) bool {203 t, _ := isTrue(reflect.ValueOf(a))204 return t205}206// and computes the Boolean AND of its arguments, returning207// the first false argument it encounters, or the last argument.208func and(arg0 interface{}, args ...interface{}) interface{} {209 if !truth(arg0) {210 return arg0211 }212 for i := range args {213 arg0 = args[i]214 if !truth(arg0) {215 break216 }217 }218 return arg0219}220// or computes the Boolean OR of its arguments, returning221// the first true argument it encounters, or the last argument.222func or(arg0 interface{}, args ...interface{}) interface{} {223 if truth(arg0) {224 return arg0225 }226 for i := range args {227 arg0 = args[i]228 if truth(arg0) {229 break230 }231 }232 return arg0233}234// not returns the Boolean negation of its argument.235func not(arg interface{}) (truth bool) {236 truth, _ = isTrue(reflect.ValueOf(arg))237 return !truth238}239// Comparison.240// TODO: Perhaps allow comparison between signed and unsigned integers.241var (242 errBadComparisonType = errors.New("invalid type for comparison")243 errBadComparison = errors.New("incompatible types for comparison")244 errNoComparison = errors.New("missing argument for comparison")245)246type kind int247const (248 invalidKind kind = iota249 boolKind250 complexKind251 intKind252 floatKind253 integerKind254 stringKind255 uintKind256)257func basicKind(v reflect.Value) (kind, error) {258 switch v.Kind() {259 case reflect.Bool:260 return boolKind, nil261 case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:262 return intKind, nil263 case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:264 return uintKind, nil265 case reflect.Float32, reflect.Float64:266 return floatKind, nil267 case reflect.Complex64, reflect.Complex128:268 return complexKind, nil269 case reflect.String:270 return stringKind, nil271 }272 return invalidKind, errBadComparisonType273}274// eq evaluates the comparison a == b || a == c || ...275func eq(arg1 interface{}, arg2 ...interface{}) (bool, error) {276 v1 := reflect.ValueOf(arg1)277 k1, err := basicKind(v1)278 if err != nil {279 return false, err280 }281 if len(arg2) == 0 {282 return false, errNoComparison283 }284 for _, arg := range arg2 {285 v2 := reflect.ValueOf(arg)286 k2, err := basicKind(v2)287 if err != nil {288 return false, err289 }290 truth := false291 if k1 != k2 {292 // Special case: Can compare integer values regardless of type's sign.293 switch {294 case k1 == intKind && k2 == uintKind:295 truth = v1.Int() >= 0 && uint64(v1.Int()) == v2.Uint()296 case k1 == uintKind && k2 == intKind:297 truth = v2.Int() >= 0 && v1.Uint() == uint64(v2.Int())298 default:299 return false, errBadComparison300 }301 } else {302 switch k1 {303 case boolKind:304 truth = v1.Bool() == v2.Bool()305 case complexKind:306 truth = v1.Complex() == v2.Complex()307 case floatKind:308 truth = v1.Float() == v2.Float()309 case intKind:310 truth = v1.Int() == v2.Int()311 case stringKind:312 truth = v1.String() == v2.String()313 case uintKind:314 truth = v1.Uint() == v2.Uint()315 default:316 panic("invalid kind")317 }318 }319 if truth {320 return true, nil321 }322 }323 return false, nil324}325// ne evaluates the comparison a != b.326func ne(arg1, arg2 interface{}) (bool, error) {327 // != is the inverse of ==.328 equal, err := eq(arg1, arg2)329 return !equal, err330}331// lt evaluates the comparison a < b.332func lt(arg1, arg2 interface{}) (bool, error) {333 v1 := reflect.ValueOf(arg1)334 k1, err := basicKind(v1)335 if err != nil {336 return false, err337 }338 v2 := reflect.ValueOf(arg2)339 k2, err := basicKind(v2)340 if err != nil {341 return false, err342 }343 truth := false344 if k1 != k2 {345 // Special case: Can compare integer values regardless of type's sign.346 switch {347 case k1 == intKind && k2 == uintKind:348 truth = v1.Int() < 0 || uint64(v1.Int()) < v2.Uint()349 case k1 == uintKind && k2 == intKind:350 truth = v2.Int() >= 0 && v1.Uint() < uint64(v2.Int())351 default:352 return false, errBadComparison353 }354 } else {355 switch k1 {356 case boolKind, complexKind:357 return false, errBadComparisonType358 case floatKind:359 truth = v1.Float() < v2.Float()360 case intKind:361 truth = v1.Int() < v2.Int()362 case stringKind:363 truth = v1.String() < v2.String()364 case uintKind:365 truth = v1.Uint() < v2.Uint()366 default:367 panic("invalid kind")368 }369 }370 return truth, nil371}372// le evaluates the comparison <= b.373func le(arg1, arg2 interface{}) (bool, error) {374 // <= is < or ==.375 lessThan, err := lt(arg1, arg2)376 if lessThan || err != nil {377 return lessThan, err378 }...

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1import (2func main() {3 doc, err := html.Parse(os.Stdin)4 if err != nil {5 fmt.Fprintf(os.Stderr, "findlinks1: %v6 os.Exit(1)7 }8 for _, link := range visit(nil, doc) {9 fmt.Println(link)10 }11}12func visit(links []string, n *html.Node) []string {13 if n.Type == html.ElementNode {14 links = append(links, n.Data)15 }16 for c := n.FirstChild; c != nil; c = c.NextSibling {17 links = visit(links, c)18 }19}

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1import (2func main() {3 doc, err := html.Parse(os.Stdin)4 if err != nil {5 fmt.Fprintf(os.Stderr, "findlinks1: %v6 os.Exit(1)7 }8 for _, link := range visit(nil, doc) {9 fmt.Println(link)10 }11}12func visit(links []string, n *html.Node) []string {13 if n.Type == html.ElementNode && n.Data == "a" {14 for _, a := range n.Attr {15 if a.Key == "href" {16 links = append(links, a.Val)17 }18 }19 }20 for c := n.FirstChild; c != nil; c = c.NextSibling {21 links = visit(links, c)22 }23}24import (25func main() {26 doc, err := html.Parse(os.Stdin)27 if err != nil {28 fmt.Fprintf(os.Stderr, "findlinks1: %v29 os.Exit(1)30 }31 for _, link := range visit(nil, doc) {32 fmt.Println(link)33 }34}35func visit(links []string, n *html

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1import (2func main() {3 doc, err := html.Parse(os.Stdin)4 if err != nil {5 fmt.Fprintf(os.Stderr, "findlinks1: %v6 os.Exit(1)7 }8 for _, link := range visit(nil, doc) {9 fmt.Println(link)10 }11}12func visit(links []string, n *html.Node) []string {13 if n.Type == html.ElementNode && n.Data == "a" {14 for _, a := range n.Attr {15 if a.Key == "href" {16 links = append(links, a.Val)17 }18 }19 }20 for c := n.FirstChild; c != nil; c = c.NextSibling {21 links = visit(links, c)22 }23}24import (25func main() {26 doc, err := html.Parse(os.Stdin)27 if err != nil {28 fmt.Fprintf(os.Stderr, "findlinks1: %v29 os.Exit(1)30 }31 for _, link := range visit(nil, doc) {32 fmt.Println(link)33 }34}35func visit(links []string, n *html.Node) []string {36 if n.Type == html.ElementNode && n.Data == "a" {37 for _, a := range n.Attr {38 if a.Key == "href" {39 links = append(links, a.Val)40 }41 }42 }43 if n.Type == html.TextNode {44 links = append(links, n.Data)45 }46 for c := n.FirstChild; c != nil; c = c.NextSibling {47 links = visit(links, c)48 }49}50import (51func main() {52 doc, err := html.Parse(os.Stdin)53 if err != nil {54 fmt.Fprintf(os.Stderr, "findlinks1: %v55 os.Exit(1)56 }57 for _, link := range visit(nil, doc) {58 fmt.Println(link)59 }

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Kind

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1import (2func main() {3 doc, err := html.Parse(os.Stdin)4 if err != nil {5 fmt.Fprintf(os.Stderr, "findlinks1: %v6 os.Exit(1)7 }8 for _, link := range visit(nil, doc) {9 fmt.Println(link)10 }11}12func visit(links []string, n *html.Node) []string {13 if n.Type == html.ElementNode {14 links = append(links, n.Data)15 }16 for c := n.FirstChild; c != nil; c = c.NextSibling {17 links = visit(links, c)18 }

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Kind

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1import (2func main() {3 f, err := os.Open("index.html")4 if err != nil {5 fmt.Println(err)6 }7 doc, err := html.Parse(f)8 if err != nil {9 fmt.Println(err)10 }11 fmt.Println(doc.Type)12}13func (n *Node) Kind() NodeType

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1import (2func main() {3 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World</h1></body></html>"))4 if err != nil {5 fmt.Println(err)6 }7 fmt.Println(doc.FirstChild.Data)8}9import (10func main() {11 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World</h1></body></html>"))12 if err != nil {13 fmt.Println(err)14 }15 fmt.Println(doc.FirstChild.Attr)16}17import (18func main() {19 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World</h1></body></html>"))20 if err != nil {21 fmt.Println(err)22 }23 fmt.Println(doc.FirstChild.Data)24}25import (26func main() {27 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World</h1></body></html>"))28 if err != nil {29 fmt.Println(err)30 }31 fmt.Println(doc.FirstChild.NextSibling.Data)32}33import (34func main() {35 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World</h1></body></html>"))36 if err != nil {37 fmt.Println(err)38 }39 fmt.Println(doc.FirstChild.FirstChild.Data)40}

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1import (2func main() {3 doc, err := html.Parse(strings.NewReader("<html><head><title>Test</title></head><body><h1>Hello!</h1></body></html>"))4 if err != nil {5 fmt.Println(err)6 }7 fmt.Println(doc.FirstChild.Data)8 fmt.Println(doc.FirstChild.FirstChild.Data)9 fmt.Println(doc.FirstChild.FirstChild.NextSibling.Data)10 fmt.Println(doc.FirstChild.FirstChild.NextSibling.FirstChild.Data)11}12import (13func main() {14 doc, err := html.Parse(strings.NewReader("<html><head><title>Test</title></head><body><h1>Hello!</h1></body></html>"))15 if err != nil {16 fmt.Println(err)17 }18 fmt.Println(doc.FirstChild.Data)19 fmt.Println(doc.FirstChild.FirstChild.Data)20 fmt.Println(doc.FirstChild.FirstChild.NextSibling.Data)21 fmt.Println(doc.FirstChild.FirstChild.NextSibling.FirstChild.Data)22}23import (24func main() {25 doc, err := html.Parse(strings.NewReader("<html><head><title>Test</title></head><body><h1>Hello!</h1></body></html>"))26 if err != nil {27 fmt.Println(err)28 }29 fmt.Println(doc.Type)30 fmt.Println(doc.FirstChild.Type)31 fmt.Println(doc.FirstChild.FirstChild.Type)32 fmt.Println(doc.FirstChild.FirstChild.NextSibling.Type)33 fmt.Println(doc.FirstChild.FirstChild.NextSibling.FirstChild.Type)34}35import (36func main() {37 doc, err := html.Parse(strings.NewReader("<html><head><title>Test</title></head><body><h1>Hello!</h

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1import (2func main() {3 doc, err := html.Parse(strings.NewReader("<html><body><h1>Hello World!</h1></body></html>"))4 if err != nil {5 panic(err)6 }7 fmt.Println(doc.FirstChild.FirstChild.Data)8}

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1import (2func main() {3 doc, err := html.Parse(strings.NewReader(`<!DOCTYPE html>4 if err != nil {5 fmt.Println("Error parsing html")6 }7}8import (9func main() {10 doc, err := html.Parse(strings.NewReader(`<!DOCTYPE html>11 if err != nil {12 fmt.Println("Error parsing html")13 }14 for _, attr := range doc.Attr {15 fmt.Println(attr.Key, attr.Val)16 }17}18import (19func main() {20 doc, err := html.Parse(strings.NewReader(`<!DOCTYPE html>21 if err != nil {22 fmt.Println("Error parsing html")23 }24}25import (26func main() {27 doc, err := html.Parse(strings.NewReader(`<!DOCTYPE html>

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1import (2func main() {3 doc = &html.Node{4 FirstChild: &html.Node{5 FirstChild: &html.Node{6 FirstChild: &html.Node{7 },8 },9 },10 }11 fmt.Println("Kind of the node: ", doc.Data)12 fmt.Println("Kind of the node: ", doc.FirstChild.Data)13 fmt.Println("Kind of the node: ", doc.FirstChild.FirstChild.Data)14 fmt.Println("Kind of the node: ", doc.FirstChild.FirstChild.FirstChild.Data)15}

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