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This error occurs when your formula returns more than one value and Webi report doesn’t know how to aggregate those values. This error occurs in below ways:#multivalue in aggregation #multivalue in breaks header or footer #multivalue in section level.Example:Let us say an account number which is associated to more than one order numbers. Your solution will not work and hence you are seeing #MULTIVALUE “Multiple Order Numbers for the same account number”.You can handle this by using an aggregated function as per your requirement like Max(), sum() or avg(). You can also check more details using this link:https://archive.sap.com/discussions/thread/1919325Read More
You can use dictionaries to interpolate strings. They have a syntax in which you need to provide the key in the parentheses between the % and the conversion character. For example, if you have a float stored in a key 'cost' and want to format it as '$xxxx.xx', then you'll place '$%(cost).2f' at the place you want to display it.Here is an example of using string formatting in dictionaries to interpolate a string and format a number:>>>print('%(language)s has %(number)03d quote types.' % {'language': "Python", "number": 2}) Python has 002 quote types.You can read up more about string formatting and their ... Read More
Following are the areas where Java has proved itself faster than C++.Memory allocation/deallocation: Memory allocation/deallocation is much faster and it is often faster to create a new big array instead of using the cached one.Object instantiation: Memory management done by GC of Java attributes faster object related operations on Java than C++.Multithreading and Synchronization: Modern Java programs makes use of multi-core systems to make synchronization and multithreading much faster operation.JIT has improved a lot over period of time and modern Java program execution now is much faster.String operations are faster by having length. Collection methods are optimized like Array copy.Class loading ... Read More
Modern Java is quite fast and is comparable to C++ code base but it still takes lot of memory. Slowness of Java programs is primarily because of bad programming practices. But following areas are where Java can be improved.Java libraries are written keeping readability and correctness in mind, not performance.Slow String based operations as Strings are UTF-16 encoded objects and are immutable. So more String are used, more memory is required.Boundary checks on arrays also make its operations bit slow.I/O Stream operations are slow considering synchronization checks on each access.Lacking low level functionality like C also attributes to slowness in ... Read More
Object-oriented programming creates reusable patterns of code to prevent code redundancy in projects. One way that recyclable code is created is through inheritance, when one subclass leverages code from another base class.Inheritance is when a class uses code written within another class.Classes called child classes or subclasses inherit methods and variables from parent classes or base classes.Because the Child subclass is inheriting from the Parent base class, the Child class can reuse the code of Parent, allowing the programmer to use fewer lines of code and decrease redundancy.Derived classes are declared much like their parent class; however, a list of ... Read More
We have the classes A and B defined as follows −class A(object): pass class B(A): passB can be proved to be a sub class of A in two ways as followsclass A(object):pass class B(A):pass print issubclass(B, A) # Here we use the issubclass() method to check if B is subclass of A print B.__bases__ # Here we check the base classes or super classes of BThis gives the outputTrue (,)
Following steps are mostly required to Troubleshoot any problem that occurred in production.As the first step, get the time frame from the user when a particular issue occurred. Get the logs for that particular time period.If logs are very large in size, use grep command to filter out errors.$ grep -o "\w*Exception" error.log | sort -r | uniq -cIt will help to get all the exceptions in error.log sorted in reversed order and give the unique result and with counts.
Python deletes unwanted objects (built-in types or class instances) automatically to free the memory space. The process by which Python periodically frees and reclaims blocks of memory that no longer are in use is called Garbage Collection.Python's garbage collector runs during program execution and is triggered when an object's reference count reaches zero. An object's reference count changes as the number of aliases that point to it changes.An object's reference count increases when it is assigned a new name or placed in a container (list, tuple, or dictionary). The object's reference count decreases when it's deleted with del, its reference is ... Read More
To check if a variable is an array, use “instanceof. The following is the syntax −variable instanceof ArrayExampleLet’s seen an example to check if the variable “sports” is an array or not? var sports = [ "tennis", "football", "cricket" ]; if (sports instanceof Array) { alert('Array!'); } else { alert('Not an array'); }
break statementThe break statement is used to exit a loop early, breaking out of the enclosing curly braces. The break statement exits out of a loop. Let’s see an example of break statement in JavaScript. The following example illustrates the use of a break statement with a while loop. Notice how the loop breaks out early once x reaches 5 and reaches to document.write (..) statement just below to the closing curly brace, Example var x = 1; document.write("Entering the loop "); ... Read More