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Is it a bad practice to use an if-statement without curly braces? [closed]
...; }` happens not to be a security bug, because it is still a bug (just not one with security consequences). On another example, things could go in the opposite direction and the braceless code could be accidentally safe. On a third example, the braceless code would be bug-free initially and the deve...
try/catch versus throws Exception
... latter swallows the exception (showing it, admittedly), whereas the first one will let it propagate. (I'm assuming that showException doesn't rethrow it.)
So if you call the first method and "do something" fails, then the caller will have to handle the exception. If you call the second method and ...
MySQL - Rows to Columns
...st, i.e. y-values and x-values
extend the base table with extra columns -- one for each x-value
group and aggregate the extended table -- one group for each y-value
(optional) prettify the aggregated table
Let's apply these steps to your problem and see what we get:
Step 1: select columns of inte...
Inserting multiple rows in a single SQL query? [duplicate]
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And please note that the maximum number of rows in one insert statement is 1000.
– cryss
Mar 21 '13 at 13:39
188
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what is the basic difference between stack and queue?
...aper. The last piece put into the stack is on the top, so it is the first one to come out. This is LIFO. Adding a piece of paper is called "pushing", and removing a piece of paper is called "popping".
Imagine a queue at the store. The first person in line is the first person to get out of lin...
When should I use a composite index?
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@felwithe MySQL can only use one index per each of the tables in a query (Exemptions are there. eg, Merging of indexes). Which ideally means that a table in a query, must use a single index for all where-clause, table join, group-by and order-by. So a se...
Android: how to handle button click
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Question 1:
Unfortunately the one in which you you say is most intuitive is the least used in Android. As I understand, you should separate your UI (XML) and computational functionality (Java Class Files). It also makes for easier debugging. It is actuall...
How to count the number of occurrences of an element in a List
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It was introduced in JDK 5 (although no one uses a version before that so it doesn't matter) docs.oracle.com/javase/8/docs/technotes/guides/collections/…
– Minion Jim
Mar 2 '19 at 15:49
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How to print without newline or space?
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Can someone explain why would I need to flush and what does it do actually?
– Rishav
Feb 4 '19 at 21:16
5
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List of tuples to dictionary
...documentation:
For example, these all return a
dictionary equal to {"one": 1, "two":
2}:
dict(one=1, two=2)
dict({'one': 1, 'two': 2})
dict(zip(('one', 'two'), (1, 2)))
dict([['two', 2], ['one', 1]])
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