You need to do a join on the tables in order to get the columns of all of them. Warning: using * to get all columns is bad practice. You should qualify (name) all the columns you need. Here is an example: SELECT * FROM table1 t1 INNER JOIN table2 t2 ON t1.key2 = t2.key2 … Read more
Full wave is double of half wave because both ‘bumps’ are used. That is easy. Now derive the halfwave: V(t) = Vpeak*sin(t); 2 PI is a full circle and we only use half of that : 0->PI Vavg = Vpeak*integral(sin(t),0 -> PI)/2*PI indefinite integral of sin(x) = -cos(x) = Vpeak*(-cos(PI) + cos(0))/2*PI = Vpeak*(-(-1) + … Read more
The item having the newest PubDate should become the lastBuildTime. [EDIT]: If there is a separate PubDate you are using too for whole feed, then lastBuildTime should be current time because you are building it at current time on-demand :). [EDIT]: 2:: As lastBuildTime is optional and you’re anyways including PubDate for whole feed, why … Read more
Question 1: Honestly, this is the most basic practical object-oriented question out there. If you don’t understand it, you need to go talk to someone. True or False: Local variables may be declared private. Local variables can never be accessed by outside code; it makes no sense to declare them private. True or False: Formal … Read more
Assuming you want a Map<User.userId, List<UserData.customerId>> you can use this: Map<Long, List<Long>> result = users.stream() .collect(Collectors.toMap( User::getUserId, u -> u.getUserData().stream() .map(UserData::getCustomerId) .collect(Collectors.toList()) )); 3 solved Java 8 – collecting into a map from a list of objects with nested list
select xxpst_util_pkg.get_type_id_by_code (‘CHANGE_REQUEST’, ‘MILESTONE_DUE_DATE_CHANGE’) comment_type_id from dual is a mean of calling a PLSQL function from a SQL statement. DUAL returns a single row, so it just yields the output of the function. It’s not dissimilar from doing my_variable := xxpst_util_pkg.get_type_id_by_code (‘CHANGE_REQUEST’, ‘MILESTONE_DUE_DATE_CHANGE’) In terms of what comes back, you’d need to look in the … Read more
It’s x > (y / z). The expression y / z returns a number which is being compared to x. The operator precedence table explains why it works even without round brackets. ┌────────────────┬───────────────────────────────┐ │ Operators │ Precedence ↓ │ ├────────────────┼───────────────────────────────┤ │ multiplicative │ * / % │ │ relational │ < > <= >= instanceof … Read more
First one you are only declaring and in second you declaring and initializing. If you use any instance of a class without initializing, then you will get null reference exception as Object reference not set to an instance of an object solved Declaring C# variable with and without Constructor
raw_input returns a string. Strings are never equal to numbers. >>> ‘0’ == 0 False Compare the string with a string. For example, to check whether the string starts with specific character (sub-string), using str.startswith: if number.startswith(‘0’): … solved Determining the First Digit
You are currently loading two grammers into your recognizer. I believe digits.gram contains numbers. File menuGrammar = new File(modelsDir, “grammar/menu.gram”); recognizer.addGrammarSearch(MENU_SEARCH, menuGrammar); File digitsGrammar = new File(modelsDir, “grammar/digits.gram”); So I think what you could do is make a file letter.gram and load it into your program #JSGF V1.0; grammar speech; public <speech> = A | … Read more
With the full code in the question we can now see it’s an integer overflow. 10000 * 180 * 3600 = 6,480,000,000. This is greater than 2,147,483,648 which is the max value of a 32-bit signed int. The results of the multiplication overflows to -2,109,934,592 and is then converted to double. To get the right … Read more
You have a red exclamaition mark on your project. Eclipse is likly to not build your project if build path problems (e.g.) aren’t resolved. So go to the Problems tab and try to resolve your errors there. If that is finished Eclipse will build your project and gives more helpful errors Edit and that is … Read more
You should move MouseHookProc definition outside of main. C++ does not allow function definitions inside of other functions. Among other things, (LPTHREAD_START_ROUTINE)clicker is also wrong, there is no need to perform cast here, instead clicker function must have correct signature, void down(); is actually a function declaration, not invocation. 2 solved expected a “;” on … Read more
Your problem is in this expression: len(cards – 1) cards appears to be a list; you can’t subtract 1 from a list. I suspect that you mean len(cards) – 1 solved How can i fix this Type Error that appears? [closed]
Try getting the half, then reverse: >>> l=[1,2,3,4,5,6] >>> l[len(l)//2:]=l[len(l)//2:][::-1] >>> l [1, 2, 3, 6, 5, 4] >>> slicing + slicing + reversing. 1 solved How to divide the list and sort in ascending and descending order using python?