contracts = Contract.objects.filter(staff=staff).filter(active=True)
if contracts.__len__() > 0:
ind = contracts.__len__() - 1
dic[‘active_contract_id’] = contracts[ind].id
else:
dic[‘active_contract_id’] = contracts[0].idGet last object of queryset in django
public void Method1(Enum foo)
{
if (GetCondition1(foo))
{
doSomething();
}
}
private bool GetCondition1(Enum foo)
{
if (foo == Enum.Value1)
return true;
return false;
}if (string.Compare(json["result"].ToString(), "OK", true) == 0)
{
if (string.Compare(json["list"][0]["result"].ToString(), "OK", true) == 0)
return null;
//omitted
}var query = $("#search-query");
query.click(function() {
if (query.val() == 'szukaj...') {
query.val('');
}
});checkParameter(elem: boolean): any {
if(elem) return true;
return null;
}public class SentCon3 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
double input;
char choice;
System.out.println("**** Menu-Driven Temperature Converter*****");
System.out.println("only lowwer case is vaild");
System.out.print("Enter the value to beconverted==> ");
input = scan.nextDouble();
System.out.println("What is your choice?");
System.out.println("a)Fahrenheit to Celsius");
System.out.println("b)Celsius to Fahrenheit");
System.out.println("c)Kelvin to Celsius");
System.out.println("d)Celsius to Kelvin");
System.out.println("e)Kelvin to Fahrenheit");
System.out.println("f)Fahrenheit to Kelvin.");
System.out.print("Please enter your choice ==>");
choice = scan.next().charAt(0);
while (choice == 'a') {
System.out.println((input / 5) * 9 + 32);
break;
}
while (choice == 'b') {
System.out.println((input - 32) * 5 / 9);
break;
}
while (choice == 'c') {
System.out.println(input - 273.15);
break;
}
while (choice == 'd') {
System.out.println(input + 273.15);
break;
}
while (choice == 'e') {
System.out.println((input - 273.5) * 9 / 5 + 32);
break;
}
while (choice == 'f') {
System.out.println((input + 459.67) * 5 / 9);
break;
}
}
}
use while as if!!!!
// GetModelStruct get value's model struct, relationships based on struct and tag definition
func (scope *Scope) GetModelStruct() *ModelStruct {
var modelStruct ModelStruct
// Scope value can't be nil
if scope.Value == nil {
return &modelStruct
}
reflectType := reflect.ValueOf(scope.Value).Type()
for reflectType.Kind() == reflect.Slice || reflectType.Kind() == reflect.Ptr {
reflectType = reflectType.Elem()
}
// Scope value need to be a struct
if reflectType.Kind() != reflect.Struct {
return &modelStruct
}
// Get Cached model struct
isSingularTable := false
if scope.db != nil && scope.db.parent != nil {
scope.db.parent.RLock()
isSingularTable = scope.db.parent.singularTable
scope.db.parent.RUnlock()
}
hashKey := struct {
singularTable bool
reflectType reflect.Type
}{isSingularTable, reflectType}
if value, ok := modelStructsMap.Load(hashKey); ok && value != nil {
return value.(*ModelStruct)
}
modelStruct.ModelType = reflectType
// Get all fields
for i := 0; i < reflectType.NumField(); i++ {
if fieldStruct := reflectType.Field(i); ast.IsExported(fieldStruct.Name) {
field := &StructField{
Struct: fieldStruct,
Name: fieldStruct.Name,
Names: []string{fieldStruct.Name},
Tag: fieldStruct.Tag,
TagSettings: parseTagSetting(fieldStruct.Tag),
}
// is ignored field
if _, ok := field.TagSettingsGet("-"); ok {
field.IsIgnored = true
} else {
if _, ok := field.TagSettingsGet("PRIMARY_KEY"); ok {
field.IsPrimaryKey = true
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
}
if _, ok := field.TagSettingsGet("DEFAULT"); ok && !field.IsPrimaryKey {
field.HasDefaultValue = true
}
if _, ok := field.TagSettingsGet("AUTO_INCREMENT"); ok && !field.IsPrimaryKey {
field.HasDefaultValue = true
}
indirectType := fieldStruct.Type
for indirectType.Kind() == reflect.Ptr {
indirectType = indirectType.Elem()
}
fieldValue := reflect.New(indirectType).Interface()
if _, isScanner := fieldValue.(sql.Scanner); isScanner {
// is scanner
field.IsScanner, field.IsNormal = true, true
if indirectType.Kind() == reflect.Struct {
for i := 0; i < indirectType.NumField(); i++ {
for key, value := range parseTagSetting(indirectType.Field(i).Tag) {
if _, ok := field.TagSettingsGet(key); !ok {
field.TagSettingsSet(key, value)
}
}
}
}
} else if _, isTime := fieldValue.(*time.Time); isTime {
// is time
field.IsNormal = true
} else if _, ok := field.TagSettingsGet("EMBEDDED"); ok || fieldStruct.Anonymous {
// is embedded struct
for _, subField := range scope.New(fieldValue).GetModelStruct().StructFields {
subField = subField.clone()
subField.Names = append([]string{fieldStruct.Name}, subField.Names...)
if prefix, ok := field.TagSettingsGet("EMBEDDED_PREFIX"); ok {
subField.DBName = prefix + subField.DBName
}
if subField.IsPrimaryKey {
if _, ok := subField.TagSettingsGet("PRIMARY_KEY"); ok {
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, subField)
} else {
subField.IsPrimaryKey = false
}
}
if subField.Relationship != nil && subField.Relationship.JoinTableHandler != nil {
if joinTableHandler, ok := subField.Relationship.JoinTableHandler.(*JoinTableHandler); ok {
newJoinTableHandler := &JoinTableHandler{}
newJoinTableHandler.Setup(subField.Relationship, joinTableHandler.TableName, reflectType, joinTableHandler.Destination.ModelType)
subField.Relationship.JoinTableHandler = newJoinTableHandler
}
}
modelStruct.StructFields = append(modelStruct.StructFields, subField)
}
continue
} else {
// build relationships
switch indirectType.Kind() {
case reflect.Slice:
defer func(field *StructField) {
var (
relationship = &Relationship{}
toScope = scope.New(reflect.New(field.Struct.Type).Interface())
foreignKeys []string
associationForeignKeys []string
elemType = field.Struct.Type
)
if foreignKey, _ := field.TagSettingsGet("FOREIGNKEY"); foreignKey != "" {
foreignKeys = strings.Split(foreignKey, ",")
}
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_FOREIGNKEY"); foreignKey != "" {
associationForeignKeys = strings.Split(foreignKey, ",")
} else if foreignKey, _ := field.TagSettingsGet("ASSOCIATIONFOREIGNKEY"); foreignKey != "" {
associationForeignKeys = strings.Split(foreignKey, ",")
}
for elemType.Kind() == reflect.Slice || elemType.Kind() == reflect.Ptr {
elemType = elemType.Elem()
}
if elemType.Kind() == reflect.Struct {
if many2many, _ := field.TagSettingsGet("MANY2MANY"); many2many != "" {
relationship.Kind = "many_to_many"
{ // Foreign Keys for Source
joinTableDBNames := []string{}
if foreignKey, _ := field.TagSettingsGet("JOINTABLE_FOREIGNKEY"); foreignKey != "" {
joinTableDBNames = strings.Split(foreignKey, ",")
}
// if no foreign keys defined with tag
if len(foreignKeys) == 0 {
for _, field := range modelStruct.PrimaryFields {
foreignKeys = append(foreignKeys, field.DBName)
}
}
for idx, foreignKey := range foreignKeys {
if foreignField := getForeignField(foreignKey, modelStruct.StructFields); foreignField != nil {
// source foreign keys (db names)
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.DBName)
// setup join table foreign keys for source
if len(joinTableDBNames) > idx {
// if defined join table's foreign key
relationship.ForeignDBNames = append(relationship.ForeignDBNames, joinTableDBNames[idx])
} else {
defaultJointableForeignKey := ToColumnName(reflectType.Name()) + "_" + foreignField.DBName
relationship.ForeignDBNames = append(relationship.ForeignDBNames, defaultJointableForeignKey)
}
}
}
}
{ // Foreign Keys for Association (Destination)
associationJoinTableDBNames := []string{}
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_JOINTABLE_FOREIGNKEY"); foreignKey != "" {
associationJoinTableDBNames = strings.Split(foreignKey, ",")
}
// if no association foreign keys defined with tag
if len(associationForeignKeys) == 0 {
for _, field := range toScope.PrimaryFields() {
associationForeignKeys = append(associationForeignKeys, field.DBName)
}
}
for idx, name := range associationForeignKeys {
if field, ok := toScope.FieldByName(name); ok {
// association foreign keys (db names)
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, field.DBName)
// setup join table foreign keys for association
if len(associationJoinTableDBNames) > idx {
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationJoinTableDBNames[idx])
} else {
// join table foreign keys for association
joinTableDBName := ToColumnName(elemType.Name()) + "_" + field.DBName
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, joinTableDBName)
}
}
}
}
joinTableHandler := JoinTableHandler{}
joinTableHandler.Setup(relationship, many2many, reflectType, elemType)
relationship.JoinTableHandler = &joinTableHandler
field.Relationship = relationship
} else {
// User has many comments, associationType is User, comment use UserID as foreign key
var associationType = reflectType.Name()
var toFields = toScope.GetStructFields()
relationship.Kind = "has_many"
if polymorphic, _ := field.TagSettingsGet("POLYMORPHIC"); polymorphic != "" {
// Dog has many toys, tag polymorphic is Owner, then associationType is Owner
// Toy use OwnerID, OwnerType ('dogs') as foreign key
if polymorphicType := getForeignField(polymorphic+"Type", toFields); polymorphicType != nil {
associationType = polymorphic
relationship.PolymorphicType = polymorphicType.Name
relationship.PolymorphicDBName = polymorphicType.DBName
// if Dog has multiple set of toys set name of the set (instead of default 'dogs')
if value, ok := field.TagSettingsGet("POLYMORPHIC_VALUE"); ok {
relationship.PolymorphicValue = value
} else {
relationship.PolymorphicValue = scope.TableName()
}
polymorphicType.IsForeignKey = true
}
}
// if no foreign keys defined with tag
if len(foreignKeys) == 0 {
// if no association foreign keys defined with tag
if len(associationForeignKeys) == 0 {
for _, field := range modelStruct.PrimaryFields {
foreignKeys = append(foreignKeys, associationType+field.Name)
associationForeignKeys = append(associationForeignKeys, field.Name)
}
} else {
// generate foreign keys from defined association foreign keys
for _, scopeFieldName := range associationForeignKeys {
if foreignField := getForeignField(scopeFieldName, modelStruct.StructFields); foreignField != nil {
foreignKeys = append(foreignKeys, associationType+foreignField.Name)
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
}
}
}
} else {
// generate association foreign keys from foreign keys
if len(associationForeignKeys) == 0 {
for _, foreignKey := range foreignKeys {
if strings.HasPrefix(foreignKey, associationType) {
associationForeignKey := strings.TrimPrefix(foreignKey, associationType)
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
}
}
}
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
associationForeignKeys = []string{scope.PrimaryKey()}
}
} else if len(foreignKeys) != len(associationForeignKeys) {
scope.Err(errors.New("invalid foreign keys, should have same length"))
return
}
}
for idx, foreignKey := range foreignKeys {
if foreignField := getForeignField(foreignKey, toFields); foreignField != nil {
if associationField := getForeignField(associationForeignKeys[idx], modelStruct.StructFields); associationField != nil {
// source foreign keys
foreignField.IsForeignKey = true
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, associationField.Name)
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationField.DBName)
// association foreign keys
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
}
}
}
if len(relationship.ForeignFieldNames) != 0 {
field.Relationship = relationship
}
}
} else {
field.IsNormal = true
}
}(field)
case reflect.Struct:
defer func(field *StructField) {
var (
// user has one profile, associationType is User, profile use UserID as foreign key
// user belongs to profile, associationType is Profile, user use ProfileID as foreign key
associationType = reflectType.Name()
relationship = &Relationship{}
toScope = scope.New(reflect.New(field.Struct.Type).Interface())
toFields = toScope.GetStructFields()
tagForeignKeys []string
tagAssociationForeignKeys []string
)
if foreignKey, _ := field.TagSettingsGet("FOREIGNKEY"); foreignKey != "" {
tagForeignKeys = strings.Split(foreignKey, ",")
}
if foreignKey, _ := field.TagSettingsGet("ASSOCIATION_FOREIGNKEY"); foreignKey != "" {
tagAssociationForeignKeys = strings.Split(foreignKey, ",")
} else if foreignKey, _ := field.TagSettingsGet("ASSOCIATIONFOREIGNKEY"); foreignKey != "" {
tagAssociationForeignKeys = strings.Split(foreignKey, ",")
}
if polymorphic, _ := field.TagSettingsGet("POLYMORPHIC"); polymorphic != "" {
// Cat has one toy, tag polymorphic is Owner, then associationType is Owner
// Toy use OwnerID, OwnerType ('cats') as foreign key
if polymorphicType := getForeignField(polymorphic+"Type", toFields); polymorphicType != nil {
associationType = polymorphic
relationship.PolymorphicType = polymorphicType.Name
relationship.PolymorphicDBName = polymorphicType.DBName
// if Cat has several different types of toys set name for each (instead of default 'cats')
if value, ok := field.TagSettingsGet("POLYMORPHIC_VALUE"); ok {
relationship.PolymorphicValue = value
} else {
relationship.PolymorphicValue = scope.TableName()
}
polymorphicType.IsForeignKey = true
}
}
// Has One
{
var foreignKeys = tagForeignKeys
var associationForeignKeys = tagAssociationForeignKeys
// if no foreign keys defined with tag
if len(foreignKeys) == 0 {
// if no association foreign keys defined with tag
if len(associationForeignKeys) == 0 {
for _, primaryField := range modelStruct.PrimaryFields {
foreignKeys = append(foreignKeys, associationType+primaryField.Name)
associationForeignKeys = append(associationForeignKeys, primaryField.Name)
}
} else {
// generate foreign keys form association foreign keys
for _, associationForeignKey := range tagAssociationForeignKeys {
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
foreignKeys = append(foreignKeys, associationType+foreignField.Name)
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
}
}
}
} else {
// generate association foreign keys from foreign keys
if len(associationForeignKeys) == 0 {
for _, foreignKey := range foreignKeys {
if strings.HasPrefix(foreignKey, associationType) {
associationForeignKey := strings.TrimPrefix(foreignKey, associationType)
if foreignField := getForeignField(associationForeignKey, modelStruct.StructFields); foreignField != nil {
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
}
}
}
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
associationForeignKeys = []string{scope.PrimaryKey()}
}
} else if len(foreignKeys) != len(associationForeignKeys) {
scope.Err(errors.New("invalid foreign keys, should have same length"))
return
}
}
for idx, foreignKey := range foreignKeys {
if foreignField := getForeignField(foreignKey, toFields); foreignField != nil {
if scopeField := getForeignField(associationForeignKeys[idx], modelStruct.StructFields); scopeField != nil {
foreignField.IsForeignKey = true
// source foreign keys
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, scopeField.Name)
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, scopeField.DBName)
// association foreign keys
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
}
}
}
}
if len(relationship.ForeignFieldNames) != 0 {
relationship.Kind = "has_one"
field.Relationship = relationship
} else {
var foreignKeys = tagForeignKeys
var associationForeignKeys = tagAssociationForeignKeys
if len(foreignKeys) == 0 {
// generate foreign keys & association foreign keys
if len(associationForeignKeys) == 0 {
for _, primaryField := range toScope.PrimaryFields() {
foreignKeys = append(foreignKeys, field.Name+primaryField.Name)
associationForeignKeys = append(associationForeignKeys, primaryField.Name)
}
} else {
// generate foreign keys with association foreign keys
for _, associationForeignKey := range associationForeignKeys {
if foreignField := getForeignField(associationForeignKey, toFields); foreignField != nil {
foreignKeys = append(foreignKeys, field.Name+foreignField.Name)
associationForeignKeys = append(associationForeignKeys, foreignField.Name)
}
}
}
} else {
// generate foreign keys & association foreign keys
if len(associationForeignKeys) == 0 {
for _, foreignKey := range foreignKeys {
if strings.HasPrefix(foreignKey, field.Name) {
associationForeignKey := strings.TrimPrefix(foreignKey, field.Name)
if foreignField := getForeignField(associationForeignKey, toFields); foreignField != nil {
associationForeignKeys = append(associationForeignKeys, associationForeignKey)
}
}
}
if len(associationForeignKeys) == 0 && len(foreignKeys) == 1 {
associationForeignKeys = []string{toScope.PrimaryKey()}
}
} else if len(foreignKeys) != len(associationForeignKeys) {
scope.Err(errors.New("invalid foreign keys, should have same length"))
return
}
}
for idx, foreignKey := range foreignKeys {
if foreignField := getForeignField(foreignKey, modelStruct.StructFields); foreignField != nil {
if associationField := getForeignField(associationForeignKeys[idx], toFields); associationField != nil {
foreignField.IsForeignKey = true
// association foreign keys
relationship.AssociationForeignFieldNames = append(relationship.AssociationForeignFieldNames, associationField.Name)
relationship.AssociationForeignDBNames = append(relationship.AssociationForeignDBNames, associationField.DBName)
// source foreign keys
relationship.ForeignFieldNames = append(relationship.ForeignFieldNames, foreignField.Name)
relationship.ForeignDBNames = append(relationship.ForeignDBNames, foreignField.DBName)
}
}
}
if len(relationship.ForeignFieldNames) != 0 {
relationship.Kind = "belongs_to"
field.Relationship = relationship
}
}
}(field)
default:
field.IsNormal = true
}
}
}
// Even it is ignored, also possible to decode db value into the field
if value, ok := field.TagSettingsGet("COLUMN"); ok {
field.DBName = value
} else {
field.DBName = ToColumnName(fieldStruct.Name)
}
modelStruct.StructFields = append(modelStruct.StructFields, field)
}
}
if len(modelStruct.PrimaryFields) == 0 {
if field := getForeignField("id", modelStruct.StructFields); field != nil {
field.IsPrimaryKey = true
modelStruct.PrimaryFields = append(modelStruct.PrimaryFields, field)
}
}
modelStructsMap.Store(hashKey, &modelStruct)
return &modelStruct
}
for(var j=0;j<10;j++){
cell=document.createElement('td');
switch(j)
{
case 0:
var date1 = events[i]['start'];
var date2 = events[i]['end'];
cell.appendChild(document.createTextNode(date1.getFullYear()+'/'+date1.getMonth()+'/'+date1.getDate()+' '+date1.getHours()+':'+date1.getMinutes()+' To '+date2.getFullYear()+'/'+date2.getMonth()+'/'+date2.getDate()+' '+date2.getHours()+':'+date2.getMinutes()));
break;
case 1: cell.appendChild(document.createTextNode(events[i]['title'])); break;
case 2: cell.appendChild(document.createTextNode(events[i]['description'])); break;
}
row.appendChild(cell);
}The for loop that counts to 10, but the last seven
const ITEM_COUNT = 100
let visibleItems = []
for (let i = 0; i < ITEM_COUNT; ++i) {
visibleItems.push(false)
}
function showItem(index) {
visibleItems = []
for (let i = 0; i < ITEM_COUNT; ++i) {
visibleItems.push(false)
}
visibleItems[index] = true
}
It was more or less like this. The guy had a collection of React components and wanted to show only one of them at a time. Instead of storing the index of the component to show at the moment, he decided that a boolean array would work much better. O(n) in runtime and space and null readability just because.
int minimum(int a, int b, int c){
int mini =a*b*c;
int iterator=0;
int test[3];
test[0]=a;
test[1]=b;
test[2]=c;
for (iterator=0;iterator<3;iterator++){
if (test[iterator]<mini){
mini=test[iterator];
}
}
return mini;
}I hope that your 3 numbers aren't larger than 1290!
//count to 10
#include <iostream>
#include <string>
int main()
{
int i = 0;
beginning:
if (i < 10) {
std::cout << ++i << std::endl;
goto beginning;
}
else goto end;
end:
return 0;
}<input type="button" value="Go and fill later" onclick="javascript:window.location='<?php echo $url; ?>info.php'" />Well, a is obsolete, let's do links as buttons!
if(products.Length < 0) {
foreach (var p in products)
{
//...
}
}
if let _ = detailInformation {
loadDetailInformation()
}when optionals are killing yourself
public enum YesNoEnum
{
Yes = 0,
No = 1
}I also like how they defined the enum values.