what is the difference between single duplicate and top stub checks?
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Duplicate checks alternate a carbonless check with a plain piece of paper. When the user writes on the original check, an exact duplicate is made on the plain paper underneath the check. ... Single checks do not have this feature, as the checkbook consists only of checks.
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equals() and hashCode() are different methods and hashCode method should not be used to check if two object references are same. Reason: hashCode just returns int value for an Object, even two different objects can have same hashCode integer. ... equals() checks if the two object references are same.
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Clone will create the object and then will do copy whereas copy will do copy only. ... you need to create the source and destination object before calling the copy() method on them. But in clone() method you need not to create the destination object as clone() method will do it for us automatically.
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An instance of a single-valued attribute can contain a single value. An instance of a multivalued attribute can contain either a single value or multiple values. ... Also, each value of a multi-valued attribute must be unique. ADSI normally loads schema data if your directory supports a schema, as Active Directory does.
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Functionally, save and insert are very similar, especially if no _id value is passed. However, if an _id key is passed, save() will update the document, while insert() will throw a duplicate key error.
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Data redundancy is reduced, which simplifies data structures and conserves disk space. Because duplicate data is minimized, the possibility of inconsistent data is greatly reduced.
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As Prakhar at comment#1 points out, WHEN OTHERS THEN NULL suppresses any error that might occur in the procedure. If the exception handler were not there, then in case something goes wrong with the code – say, a duplicate record is inserted which violates a unique constraint – an error will be raised.
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The ftok() function returns a key based on path and id that is usable in subsequent calls to msgget(), semget(), and shmget(). ... The ftok() function returns the same key value for all paths that name the same file, when called with the same id value.
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They are almost identical - the only difference is that debug messages are hidden by default in recent versions of Chrome (you have to set the log level to Verbose in the Devtools topbar while in console to see debug messages; log messages are visible by default).
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Batch and hash totals are two special validation checks that are used when data is entered in batches to identify if one of these types of error occurs. Batch Total. Before the information on the documents is entered the user counts how many documents there are.
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Single() expects one and only one element in the collection. Single() throws an exception when it gets no element or more than one elements in the collection. ... SingleOrDefault() will throw an exception if there is more than one elements in a colection or for the specified condition.
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For SORT FIELDS=COPY,there is no difference between INREC and OUTREC. For a sort or merge, the INREC statement is processed BEFORE sorting or merging occurs whereas the OUTREC statement is processed AFTER sorting or merging occurs. In simple terms INREC is the layout that you want the sort program to process.
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2 Answers. A BST (from which the AVL descends) with duplicate keys can have its rotation make nodes with the same key be on both sides of the parent node, in which case, some ambiguity might result.
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There is a very important difference if the source of the data is Entity Framework: Find will find entities in the 'added' state that are not yet persisted, but Where will not. This is by design. Find is only implemented in List<T> , while Where(). FirstOrDefault() works with all IEnumerable<T> .
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If you don't specifically want an exception thrown in the event that there is more than one item, use First() . ... The only difference is that Single() expects there to be only one item in the enumeration to begin with, and will throw an exception if there are more than one.
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Most single-sided keys cost $1.50 each to duplicate. Double-sided keys (with cuts on both sides of the key) cost more. Unusual, foreign, or high-security keys are also more expensive to duplicate.
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Unique values - Relate to the DISTINCT statement. It checks for unique values ONLY in in the fields selected for output, and eliminates duplicate rows. Just the two unique names in the list. The results are not updatable, since they are not necessarily corresponding to a unique record.