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What are DDL and DML?
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More information see here: MySQL What is DDL, DML and DCL?, the original is as follows:
DDL
DDL is short name of Data Definition Language, which deals with
database schemas and descriptions, of how the data should reside in
the database.
CREA...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
weak references don't seem to work in Swift unless a protocol is declared as @objc , which I don't want in a pure Swift app.
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Explain the use of a bit vector for determining if all characters are unique
I am confused about how a bit vector would work to do this (not too familiar with bit vectors). Here is the code given. Could someone please walk me through this?
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What is the difference between “AS” and “IS” in an Oracle stored procedure?
I see Oracle procedures sometimes written with "AS", and sometimes with "IS" keyword.
6 Answers
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What is the use of making constructor private in a class?
...tic factory method inside the class itself. Singleton can also belong to this category.
A utility class, that only contains static methods.
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What is the correct way of using C++11's range-based for?
What is the correct way of using C++11's range-based for ?
4 Answers
4
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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...mory with certain patterns such as 0xCD and 0xDD . What I want to know is when and why this happens.
9 Answers
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What is the best way to detect a mobile device?
Is there a way to detect whether or not a user is using a mobile device in jQuery? Something similar to the CSS @media attribute? I would like to run a different script if the browser is on a handheld device.
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Generating a random password in php
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Security warning: rand() is not a cryptographically secure pseudorandom number generator. Look elsewhere for generating a cryptographically secure pseudorandom string in PHP.
Try this (use strlen instead of count, because count on a string is alway...
How to get unique device hardware id in Android? [duplicate]
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Update: 19 -11-2019
The below answer is no more relevant to present day.
So for any one looking for answers you should look at the documentation linked below
https://developer.android.com/training/articles/user-data-ids
Old Answer - Not relevant now.
You ch...