void main() {
List<int> numbers = [55,58,62,15,14,19,20];
List oddNumbers = [];
List evenNumbers = [];
for (int index = 0; index < numbers.length; index++) {
print(numbers[index]);
if(numbers[index]% 2 !=0) {
oddNumbers.add(numbers[index]);
} else if(numbers[index]%2 != 0) {
evenNumbers.add(numbers[index]);
}
}
print("Odd numbers:$oddNumbers");
print("Even numbers:$evenNumbers");
}
it gives:
Odd numbers:[55, 15, 19]
Even numbers:[]
Why the even numbers list is empty?
Hi You're using same logic in both if and else conditions. Please check below snippet.
if(numbers[index]% 2 !=0) {
oddNumbers.add(numbers[index]); } else
if(numbers[index]%2 == 0) {
evenNumbers.add(numbers[index]); } }
for (int index = 0; index < numbers.length; index++) {
if(numbers[index]% 2 !=0) {
oddNumbers.add(numbers[index]);
} else if(numbers[index]% 2 != 1) {
evenNumbers.add(numbers[index]);
}
}
print("Odd numbers:$oddNumbers");
print("Even numbers:$evenNumbers");
I have a problem when I'm trying to find a way to check if a trade was made on the current bar or not to stop the EA for making multiple entries on the same bar.
When I don't do a multi Currency EA I usually just use
static datetime lastTradeBar;
and
if(lastTradeBar!=Time[0])
{
if(PFTP_BuySignal > 0 && PFTP_BuySignal_Prev == 0 && PFTP_Rate > PFTP_Rate_Value)
{
myTP = PFTP_TP1;
mySL = PFTP_BuySL;
return (1);
}
if(PFTP_SellSignal > 0 && PFTP_SellSignal_Prev == 0 && PFTP_Rate > PFTP_Rate_Value)
{
myTP = PFTP_TP1;
mySL = PFTP_SellSL;
return (-1);
}
else
return (0);
lastTradeBar=Time[0];
};
return (0);
}
but this doesn't work when using it as I do now.
I'm thinking I need to make a myArray[sym,period,lastTradeBar] or myArray [sym][period][lastTradeBar]
but I can't wrap my head around how or where to put it.
this is the flow
int OnInit() ->
void OnTimer() ->
void LoopThruSym(stringlistOfSym) ->
void LoopThruPeriod(string sym, string listOfPeriods, int listOfSym) ->
void Trade(string sym, int period) ->
int Signal(string sym, int period)
This is how the flow is now.
int OnInit()
{
EventSetTimer(5);
return(INIT_SUCCEEDED);
}
....
void OnTimer()
{
LoopThruSym(symbols);
}
....
void LoopThruSym(string listOfSym)
{
if(Mode == All)
{
int i;
int numSymbolmarketWatch=SymbolsTotal(false);
numSymbols=numSymbolmarketWatch;
ArrayResize(symbolListFinal,numSymbolmarketWatch);
for(i=0; i<numSymbolmarketWatch; i++)
{
symbolListFinal[i]=SymbolName(i,false);
}
}
else
if(Mode == Selected)
{
string sep=",";
ushort u_sep;
int i;
u_sep=StringGetCharacter(sep,0);
StringSplit(listOfSym,u_sep,symbolList);
numSymbols=ArraySize(symbolList);
ArrayResize(symbolListFinal,numSymbols);
for(i=0; i<numSymbols; i++)
{
symbolListFinal[i]=symbolPrefix+symbolList[i]+symbolSuffix;
LoopThruPeriod(symbolListFinal[i],periods, numSymbols);
}
}
else
if(Mode == Current)
{
LoopThruPeriod(Symbol(),periods,numSymbols);
}
return;
}
....
void LoopThruPeriod(string sym, string listOfPeriods, int listOfSym)
{
if(ModePeriod == All_Period)
{
string periodsALL = "1,5,15,30,60,240,1440,10080,43200";
string sep=",";
ushort u_sep;
int i;
int lastTradeBarArrayCount;
u_sep=StringGetCharacter(sep,0);
StringSplit(periodsALL,u_sep,periodList);
numPeriods=ArraySize(periodList);
ArrayResize(periodListFinal,numPeriods);
lastTradeBarArrayCount = listOfSym+numPeriods;
ArrayResize(lastTradeBarArray,lastTradeBarArrayCount);
for(i=0; i<numPeriods; i++)
{
periodListFinal[i]=symbolPrefix+periodList[i]+symbolSuffix;
Trade(sym,StrToInteger(periodListFinal[i]));
Comment("lastTradeBarArrayCount = "+lastTradeBarArrayCount);
}
}
else
if(ModePeriod == Selected_Period)
{
string sep=",";
ushort u_sep;
int i;
int lastTradeBarArrayCount;
u_sep=StringGetCharacter(sep,0);
StringSplit(listOfPeriods,u_sep,periodList);
numPeriods=ArraySize(periodList);
ArrayResize(periodListFinal,numPeriods);
lastTradeBarArrayCount = listOfSym*numPeriods;
ArrayResize(lastTradeBarArray,lastTradeBarArrayCount);
for(i=0; i<numPeriods; i++)
{
periodListFinal[i]=symbolPrefix+periodList[i]+symbolSuffix;
Trade(sym,StrToInteger(periodListFinal[i]));
Comment("lastTradeBarArrayCount = "+lastTradeBarArrayCount);
}
}
if(ModePeriod == Current_Period)
{
Trade(sym,Period());
}
}
...
void Trade(string sym, int period)
{
//Print("Symbole = " + sym + " : " + period);
if(OrderMethod == BuyandSell)
{
if(Signal(sym,period) == 1 && CheckMoneyForTrade(sym,Lots,OP_BUY) && CheckVolumeValue(sym,Lots))
LimitBuy(sym,period);
else
if(Signal(sym,period) == -1 && CheckMoneyForTrade(sym,Lots,OP_SELL) && CheckVolumeValue(sym,Lots))
LimitSell(sym,period);
}
else
if(OrderMethod == BuyOnly)
{
if(Signal(sym,period) == 1 && CheckMoneyForTrade(sym,Lots,OP_BUY) && CheckVolumeValue(sym,Lots))
LimitBuy(sym,period);
}
else
if(OrderMethod == SellOnly)
{
if(Signal(sym,period) == -1 && CheckMoneyForTrade(sym,Lots,OP_SELL) && CheckVolumeValue(sym,Lots))
LimitSell(sym,period);
}
//Trail(sym);
return;
}
...
int Signal(string sym, int period)
{
if(lastTradeBar!=Time[0])
{
if(PFTP_BuySignal > 0 && PFTP_BuySignal_Prev == 0 && PFTP_Rate > PFTP_Rate_Value)
{
myTP = PFTP_TP1;
mySL = PFTP_BuySL;
return (1);
}
if(PFTP_SellSignal > 0 && PFTP_SellSignal_Prev == 0 && PFTP_Rate > PFTP_Rate_Value)
{
myTP = PFTP_TP1;
mySL = PFTP_SellSL;
return (-1);
}
else
return (0);
lastTradeBar=Time[0];
};
return (0);
}
Code a function on the "void OnTick()" like this:
void OnTick()
{
//---
CheckForSignal();
}
And then code the function "CheckForSignal()"
//+------------------------------------------------------------------+
//| Function "CheckForSignal()" |
//+------------------------------------------------------------------+
void CheckForSignal(){
//check here a bar until a Signal given Signal given then initialize it to Time[]
static datetime candletime=0;
if(candletime!=Time[0]){
double upArrow=iCustom(your Custom indicator or whatever parameters);
if(upArrow != EMPTY_VALUE){
EnterTrade(OP_BUY);
}
double downArrow=iCustom(your Custom indicator or whatever parameters);
if(downArrow != EMPTY_VALUE){
EnterTrade(OP_SELL);
}
// if we have a Signal we will initialize candle time to Time[0] to avoid multiple Orders
candletime=Time[0];
}
}
//+------------------------------------------------------------------+
Then Send Signal to Open or Close or whatever you need in my example we will open Trades
//+------------------------------------------------------------------+
//| Function "EnterTrade()" |
//+------------------------------------------------------------------+
void EnterTrade(int type){
int err=0;
double price=0;
double sl=0;
double tp=0;
if(type == OP_BUY){
price=Ask;
}else{
price=Bid;
}
//steppoin8-step15: replace function "OrderSend" parameter
// ->variablename "name" (magic)
//steppoint8-step16: end ";"
int ticket=OrderSend(Symbol(),type,LotSize,price,slippage,0,0,"EA Trade",magic,0,clrMagenta);
if(ticket>0){
if(OrderSelect(ticket,SELECT_BY_TICKET)){
if(OrderType()==OP_BUY){
sl=OrderOpenPrice()-(stopLoss*pips);
tp=OrderOpenPrice()+(takeProfit*pips);
}else if(OrderType()==OP_SELL){
sl= OrderOpenPrice()+(stopLoss*pips);
tp= OrderOpenPrice()-(takeProfit*pips);
}
if(!OrderModify(ticket,price,sl,tp,0,clrMagenta)){
err=GetLastError();
Print("Encountered an error during modification!"+(string)err+" "+ErrorDescription(err));
}
}else{
Print("Failed to Select Order",ticket);
err=GetLastError();
Print("Encountered an error while selecting order"+(string)ticket+" error number"+(string)err+" "+ErrorDescription(err));
}
}
else{
err=GetLastError();
Print("Encountered an error during order placement"+(string)err+" "+ErrorDescription(err));
}
}
//+------------------------------------------------------------------+
This is not an answer more of like progress.
So what i'm doing not instead of checking for candletime=Time[0] I check then the last trade close time is for that sym/magic nr and comment. and then runing it thru if(iBarShift(sym,period,OrderCloseTime()) > 1)
this kinda works but I'm getting problems down the road if I'm trying to use symbols with different miniLots. But that will come on another post.
bool getLastOrderClose(string sym, int period)
{
if(OrdersHistoryTotal() == 0)
return true;
string comment = "Multi Currency "+sym+":"+IntegerToString(period);
int count = 0;
int tradesPerSymbole =0;
for(int i=OrdersHistoryTotal()-1; i >= 0; i--)
if(OrderSelect(i, SELECT_BY_POS, MODE_HISTORY))
{
if(OrderSymbol() == sym)
{
if(OrderMagicNumber() == Magic)
{
tradesPerSymbole++;
if(StringFind(comment,OrderComment())<0)
{
if(iBarShift(sym,period,OrderCloseTime()) > 1)
{
return true;
}
}
}
}
}
else
{
Print(sym +" : "+"OrderSend() - getLastOrderClose - error - ", ErrorDescription(GetLastError()));
}
if(tradesPerSymbole == 0)
return true;
return false;
};
//OrderSend('EURUSD',blablabla Parameter)
//OrderSend('GBPUSD',blablabla Parameter)
//OrderSend('USDJPY',blablabla Parameter)
//OrderSend('EURCHF',blablabla Parameter)
int ticket=OrderSend('EURUSD',type,LotSize,price,slippage,0,0,"EA Trade",magic,0,clrMagenta);
for(int I=ticket;ticket<Orderstotal();i++){
if(OrderSelect(ticket,SELECT_BY_TICKET)){
if(OrderType()==OP_BUY){
sl=OrderOpenPrice()-(stopLoss*pips);
tp=OrderOpenPrice()+(takeProfit*pips);
}else if(OrderType()==OP_SELL){
sl= OrderOpenPrice()+(stopLoss*pips);
tp= OrderOpenPrice()-(takeProfit*pips);
}
if(!OrderModify(ticket,price,sl,tp,0,clrMagenta)){
err=GetLastError();
Print("Encountered an error during modification!"+(string)err+" "+ErrorDescription(err));
}
}else{
Print("Failed to Select Order",ticket);
err=GetLastError();
Print("Encountered an error while selecting order"+(string)ticket+" error number"+(string)err+" "+ErrorDescription(err));
}
}
else{
err=GetLastError();
Print("Encountered an error during order placement"+(string)err+" "+ErrorDescription(err));
}
}
//+------------------------------------------------------------------+
I think its not the pro solution but I would declare a Ordersend function for all the pairs where u want to open the order (I need not to say that the order send function should be declared in a conditional so only the the real ordersend be placed)
but the part where I want your attention is you can do it the hardware by declaring the Ordersend(not with Symbol() instead of that with "YourPairname");
hope this help you a little bit to reach your goal gl
i'm trying to make an app that can create a list of available wifi access point. here's part of the code i used:
x = new BroadcastReceiver()
{
#Override
public void onReceive(Context c, Intent intent)
{
results = wifi.getScanResults();
size = results.size();
if (results != null) {
for (int i=0; i<size; i++){
ScanResult scanresult = wifi.getScanResults().get(i);
String ssid = scanresult.SSID;
int rssi = scanresult.level;
String rssiString = String.valueOf(rssi);
textStatus.append(ssid + "," + rssiString);
textStatus.append("\n");
}
unregisterReceiver(x); //stops the continuous scan
textState.setText("Scanning complete!");
} else {
unregisterReceiver(x);
textState.setText("Nothing is found. Please make sure you are under any wifi coverage");
}
}
};
both textStatus and textState is a TextView.
i can get this to work but sometimes the result shows duplicate SSID but with different signal level, in a single scan. there might be 3-4 same SSIDs but with different signal level.
is it really different SSIDs and what differs them? can anyone explain?
Are you having several router modems for the same network? For example: A company has a big wireless network with multiple router modems installed in several places so every room has Wifi. If you do that scan you will get a lot of results with the same SSIDs but with different acces points, and thus different signal level.
EDIT:
According to Walt's comment you can also have multiple results despite having only one access point if your modem is dual-band.
use below code to to remove duplicate ssids with highest signal strength
public void onReceive(Context c, Intent intent) {
ArrayList<ScanResult> mItems = new ArrayList<>();
List<ScanResult> results = wifiManager.getScanResults();
wifiListAdapter = new WifiListAdapter(ConnectToInternetActivity.this, mItems);
lv.setAdapter(wifiListAdapter);
int size = results.size();
HashMap<String, Integer> signalStrength = new HashMap<String, Integer>();
try {
for (int i = 0; i < size; i++) {
ScanResult result = results.get(i);
if (!result.SSID.isEmpty()) {
String key = result.SSID + " "
+ result.capabilities;
if (!signalStrength.containsKey(key)) {
signalStrength.put(key, i);
mItems.add(result);
wifiListAdapter.notifyDataSetChanged();
} else {
int position = signalStrength.get(key);
ScanResult updateItem = mItems.get(position);
if (calculateSignalStength(wifiManager, updateItem.level) >
calculateSignalStength(wifiManager, result.level)) {
mItems.set(position, updateItem);
wifiListAdapter.notifyDataSetChanged();
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
This is my simple Solution please and it is work for me
private void scanWifiListNew() {
wifiManager.startScan();
List<ScanResult> wifiList = wifiManager.getScanResults();
mWiFiList = new ArrayList<>();
for(ScanResult result: wifiList){
checkItemExists(mWiFiList, result);
}
setAdapter(mWiFiList);
}
private void printList(List<ScanResult> list){
for(ScanResult result: list){
int level = WifiManager.calculateSignalLevel(result.level, 100);
System.out.println(result.SSID + " Level is " + level + " out of 100");
}
}
private void checkItemExists(List<ScanResult> newWiFiList, ScanResult resultNew){
int indexToRemove = -1;
if(newWiFiList.size() > 0) {
for (int i = 0; i < newWiFiList.size(); i++) {
ScanResult resultCurrent = newWiFiList.get(i);
if (resultCurrent.SSID.equals(resultNew.SSID)) {
int levelCurrent = WifiManager.calculateSignalLevel(resultCurrent.level, 100);
int levelNew = WifiManager.calculateSignalLevel(resultNew.level, 100);
if (levelNew > levelCurrent) {
indexToRemove = i;
break;
}else indexToRemove = -2;
}
}
if(indexToRemove > -1){
newWiFiList.remove(indexToRemove);
newWiFiList.add(indexToRemove,resultNew);
}else if(indexToRemove == -1)newWiFiList.add(resultNew);
} else newWiFiList.add(resultNew);
}
private void setAdapter(List<ScanResult> list) {
listAdapter = new WifiListAdapter(getActivity().getApplicationContext(), list);
wifiListView.setAdapter(listAdapter);
}
Does anyone know how to get email2 and mobile2 from the phonebook? The BlackBerryContact class does not have a constant like BlackBerryContact.EMAIL for email2 and mobile2.
if (contacts.isSupportedField(BlackBerryContact.EMAIL)) {
try {
if (contact.countValues(BlackBerryContact.EMAIL) > 0)
email1 = contact.getString(BlackBerryContact.EMAIL, 0);
System.out.println("Email1 " + email1);
if (contact.countValues(BlackBerryContact.EMAIL) > 1)
email2 = contact.getString(BlackBerryContact.EMAIL, 1);
System.out.println("Email2 " + email2);
} catch (Exception e) {
System.out.println("Exception::" + e.getMessage());
}
}
if (contacts.isSupportedField(BlackBerryContact.TEL)) {
int count = contact.countValues(BlackBerryContact.TEL);
for (int i = 0; i < count; i++) {
int attribute = contact.getAttributes(BlackBerryContact.TEL, i);
if(attribute == BlackBerryContact.ATTR_MOBILE){
String mobile = contact.getString(BlackBerryContact.TEL,i);
lblField1.setText(mobile);
}
if(attribute == BlackBerryContact.ATTR_HOME){
String home = contact.getString(BlackBerryContact.TEL, i);
lblField2.setText(home);
}
}
}
How can we populate a Listfield in blackberry with results from a Autocomplete field using Blackberry API(JDE 5)
This is the code to get Contacts, returns a vector containing string array..
contact[0] is name, contact[1] is email and contact[2] is contact number..
read elements from vector and set autocompleteField:Example: http://docs.blackberry.com/en/developers/deliverables/18125/Autocomplete_text_field_1200231_11.jsp
private Vector getContacts() {
Vector result = new Vector();
try {
BlackBerryContactList contactList = (BlackBerryContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST, PIM.READ_ONLY);
Enumeration enumx = contactList.items();
while (enumx.hasMoreElements()) {
BlackBerryContact c = (BlackBerryContact) enumx.nextElement();
String[] contact = new String[3];
if (contactList.isSupportedField(BlackBerryContact.NAME)) {
String[] name = c.getStringArray(BlackBerryContact.NAME, 0);
String firstName = name[Contact.NAME_GIVEN];
String lastName = name[Contact.NAME_FAMILY];
System.out.println("this is contact..........." + firstName);
contact[0] = firstName + " " + lastName;
}
if (contactList.isSupportedField(BlackBerryContact.EMAIL)) {
StringBuffer emails = new StringBuffer();
int emailCount = c.countValues(BlackBerryContact.EMAIL);
for (int i = 0; i < emailCount; i++) {
String email = c.getString(BlackBerryContact.EMAIL, i);
if (email != null) {
emails.append(email.trim());
emails.append("; ");
}
}
contact[1] = emails.toString();
}
if ((contactList.isSupportedField(BlackBerryContact.TEL)) && (c.countValues(BlackBerryContact.TEL) > 0)) {
int numValues = 0;
try {
numValues = c.countValues(BlackBerryContact.TEL);
} catch (Exception localException) {
}
String mobileNumber = "";
String homeNumber = "";
String workNumber = "";
for (int i = 0; i < numValues; ++i) {
if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_WORK)
workNumber = c.getString(BlackBerryContact.TEL, i);
else if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_HOME)
homeNumber = c.getString(BlackBerryContact.TEL, i);
else if (c.getAttributes(BlackBerryContact.TEL, i) == BlackBerryContact.ATTR_MOBILE)
mobileNumber = c.getString(BlackBerryContact.TEL, i);
}
if (!mobileNumber.equalsIgnoreCase(""))
contact[2] = mobileNumber.toString();
else if (!homeNumber.equalsIgnoreCase(""))
contact[2] = homeNumber.toString();
else if (!workNumber.equalsIgnoreCase(""))
contact[2] = workNumber.toString();
}
result.addElement(contact);
}
} catch (PIMException ex) {
ex.printStackTrace();
}
return result;
}
There's a sample app provided with the developer tools that demonstrates the use of this field. From your developer tools directory go to samples/com/rim/samples/device/ui/autocompletefielddemo and you'll see the AutoCompleteFieldDemo.java app.