I have the following:
if(A==B)
{
//do stuff
}
if(C==B)
{
//do stuff
}
if(A==B)
{
//do stuff
}
else if(C==B)
{
//do stuff
}
What is the difference between the two? I get the meaning of it but. I have seen programmers prefer the first one instead of the 2nd one? why?
I personally prefer the 2nd one.
I am not quite sure how to describe this problem so i will just say what it's supposed to do and what it is actually doing.
what's supposed to happen in the below code is when i run car_name.drive()
if random.choice(EVENTS) == "gas_station":
AT_GAS_STATION = True
print("You are at a gas station")
and if AT_GAS_STATION is true is prints'you are at a gas station' which it does, but if i then run car_name.refuel it should execute this part:
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == True:
self.fuel_level = self.fuel_capacity
print("Your fuel tank is full")
But it does not it instead executes this:
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == False:
print("You are not at a gas station and therfore can't fill up")
what i mean is that an idle session would look like this:
>>> from car import Car
>>> pilot = Car("honda", "pilot", 2003, 19, "blue")
>>> pilot.drive()
You are at a gas station
The car is moving
>>> pilot.refuel()
You are not at a gas station and therfore can't fill up
So i believe that the problem is it is not changing AT_GAS_STATION to False
I have tried running getattr(pilot, "self.fuel_level") to see if i had filled up but just printed the wrong message but i got this:
Traceback (most recent call last):
File "<pyshell#80>", line 1, in <module>
getattr(pilot, "self.fuel_level")
AttributeError: 'Car' object has no attribute 'self.fuel_level'
The full code:
import random
EVENTS = [
"gas_station",
"nothing",
"nothing",
"nothing",
"nothing",
"nothing"]
random.shuffle(EVENTS)
AT_GAS_STATION = False
class Car():
"""Your car."""
def __init__(self, make, model, year, fuel_capacity, color=None):
"""Atributtes of your car, fuel in gallons."""
self.color = color
self.make = make
self.model = model
self.year = year
self.fuel_capacity = fuel_capacity
self.fuel_level = self.fuel_capacity
if self.year < 2000:
print("Your car is old")
def refuel(self):
"""Fill up your gas."""
if self.fuel_level >= self.fuel_capacity:
print("Your tank is already full :P")
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == False:
print("You are not at a gas station and therfore can't fill up")
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == True:
self.fuel_level = self.fuel_capacity
print("Your fuel tank is full")
def drive(self):
"""Drive your car"""
self.fuel_level = self.fuel_level -1
if random.choice(EVENTS) == "gas_station":
AT_GAS_STATION = True
print("You are at a gas station")
elif random.choice(EVENTS) != "gas_station":
AT_GAS_STATION = False
if self.fuel_level < 1:
print("You need more gas")
elif self.fuel_level <= self.fuel_capacity /2:
print(self.fuel_level -1)
else:
print("The car is moving")
def specs(self):
"""Display specs of your car"""
print(self.color,self.year,self.make,self.model,self.fuel_capacity, "Gallons")
Hopefully i have provided enough information but if you want more just ask.
I am not quite sure how to describe this problem so i will just say what it's supposed to do and what it is actually doing.
what's supposed to happen in the below code is when i run car_name.drive()
if random.choice(EVENTS) == "gas_station":
AT_GAS_STATION = True
print("You are at a gas station")
and if AT_GAS_STATION is true is prints'you are at a gas station' which it does, but if i then run car_name.refuel it should execute this part:
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == True:
self.fuel_level = self.fuel_capacity
print("Your fuel tank is full")
But it does not it instead executes this:
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == False:
print("You are not at a gas station and therfore can't fill up")
what i mean is that an idle session would look like this:
>>> from car import Car
>>> pilot = Car("honda", "pilot", 2003, 19, "blue")
>>> pilot.drive()
You are at a gas station
The car is moving
>>> pilot.refuel()
You are not at a gas station and therfore can't fill up
So i believe that the problem is it is not changing AT_GAS_STATION to False
I have tried running getattr(pilot, "self.fuel_level") to see if i had filled up but just printed the wrong message but i got this:
Traceback (most recent call last):
File "<pyshell#80>", line 1, in <module>
getattr(pilot, "self.fuel_level")
AttributeError: 'Car' object has no attribute 'self.fuel_level'
The full code:
import random
EVENTS = [
"gas_station",
"nothing",
"nothing",
"nothing",
"nothing",
"nothing"]
random.shuffle(EVENTS)
AT_GAS_STATION = False
class Car():
"""Your car."""
def __init__(self, make, model, year, fuel_capacity, color=None):
"""Atributtes of your car, fuel in gallons."""
self.color = color
self.make = make
self.model = model
self.year = year
self.fuel_capacity = fuel_capacity
self.fuel_level = self.fuel_capacity
if self.year < 2000:
print("Your car is old")
def refuel(self):
"""Fill up your gas."""
if self.fuel_level >= self.fuel_capacity:
print("Your tank is already full :P")
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == False:
print("You are not at a gas station and therfore can't fill up")
elif self.fuel_level < self.fuel_capacity and AT_GAS_STATION == True:
self.fuel_level = self.fuel_capacity
print("Your fuel tank is full")
def drive(self):
"""Drive your car"""
self.fuel_level = self.fuel_level -1
if random.choice(EVENTS) == "gas_station":
AT_GAS_STATION = True
print("You are at a gas station")
elif random.choice(EVENTS) != "gas_station":
AT_GAS_STATION = False
if self.fuel_level < 1:
print("You need more gas")
elif self.fuel_level <= self.fuel_capacity /2:
print(self.fuel_level -1)
else:
print("The car is moving")
def specs(self):
"""Display specs of your car"""
print(self.color, self.year, self.make, self.model, self.fuel_capacity, "Gallons")
Hopefully i have provided enough information but if you want more just ask.
I'm trying to run a web visit analysis locked to the end date of a subscription contract. Here is an example of my data in a csv file: enter image description here
I need to do the following: 1. based on the enddateM value (the month in which the contract has been renewed), I need to derive the time-to-the-end-date. to make it simple, if the enddateM is 12 (December), then Nov-14 needs to be labeled as "-1 month" (create a new column), Oct-14 as "-2 months" and so on backward. I would also like to have the values copied in the new column. so the value in the Nov-14 column should be copied in the "-1 month" column. I have NO idea of how I am supposed to do that on R, is there an easy way to do it? Thanks
so I m writing a UDF in Excel vba of the kind:
function ... if ... then ... else for i... to ... equations ... next i * end function
Now I noticed, that the function seems to work just fine, however I was wondering whether I shouldnt be using an "end if" at the position of (*) in the code? If I do, I receive an error msg stating there was no if corresponding IF to that "end if" block, though!? So in general, isn't there a Need for an "end if" in if then else constructions ? Thanks in advance!
/edit: 'if ... then ... else' is a one liner. However the else block does contain multiple lines and in particular a loop...
I want to change my ng-if value "loggedIn" in index.html from my login/login.js by using this codes
$scope.doLogin = function() {
console.log('Logging in as ', $scope.loginData.email);
AuthService.login($scope.loginData)
.then(function() {
$rootScope.loggedIn = true;
$scope.layout = 'styles';
$state.go('app.mainReg');
$stateParams.id = $currentUserId;
console.log($currentUserId);
});
};
and I have this kind of stateProvider in my app.js
.state('app', {
url:'/',
abstract: true,
views:{
'bodyLogin': {
templateUrl : 'views/login/body.html',
controller : 'BodyController'
},
'bodyMain': {
templateUrl : 'views/main/body.html',
controller : 'BodyController'
}
}
})
.state('app.mainUnreg', {
url:'home',
views: {
'content@app': {
templateUrl : 'views/login/home.html',
controller : ''
}
}
})
.state('app.mainReg', {
url:':userID',
views: {
'header@app': {
templateUrl : 'views/main/header.html',
controller : ''
},
'sidebar@app': {
templateUrl : 'views/main/sidebar.html',
controller : ''
},
'middle@app': {
templateUrl : 'views/main/home.html',
controller : ''
},
'footer@app': {
templateUrl : 'views/main/footer.html',
controller : ''
}
},
controller: 'MainController'
})
and I separate each state by div
<div ng-if="!loggedIn" ui-view="bodyLogin" class="site-wrapper" ui-sref-active="app.mainUnreg"></div>
<div ng-if="loggedIn" ui-view="bodyMain" ui-sref-active="app.mainReg"></div>
but, I seems that it didn't give any effect, even I have logged in and being redirected, the statement for loggedIn didn't change, still false
I have put the files in GitHub
Does anyone have any idea where I made some mistake, so my loggedIn statement couldn't be changed?
I'm trying to display data from a database. I was able to do it, but I don't know how to only fetch data according the values I have. For example:
I have a value a = 5; then data to display will be : data1, data2, data3, data4, data5 (< display 5 data).
But I don't know how to do that. Any help is appreciated. Here is my code:
//Temporary Value
final double a = Math.floor(Double.parseDouble(transportResultA) / 10);
final double b = Math.floor(Double.parseDouble(transportResultB)/10);
final double c = Math.floor(Double.parseDouble(transportResultC)/10);
Fetch data code :
for (int i = 0; i < response.length() ; i++) {
try {
JSONObject obj = response.getJSONObject(i);
Exercise exercise = new Exercise();
if (obj.getString("KindOf").equals(textKindOF.getText().toString()) && obj.getString("Type").equals("Cardio")) {
exercise.setTipe(obj.getString("KindOf"));
exercise.setJenis(obj.getString("Type"));
exercise.setMainmuscle(obj.getString("Name"));
exerciseList.add(exercise);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
If I change how many data I want to fetch, I change response.length() to a data success only 5 data, but when I try to change obj.getString("Type").equals("Cardio") with other type like obj.getString("Type").equals("Strength") data didn't display. What seems to be wrong with my code?