List of questions. Page #24

6

answers

How to SELECT all but a few fields?

It is well known ( and has already been asked ) you should avoid using SELECT * in some cases in queries to the bank. But imagine that I have a table with 50 columns, and I want to select 40 of them. Just selecting the fields would alr...

asked on 30.06.2014 / 15:58

1

answer

When and how to implement Parcelable vs. Serializable?

After much time using the Serializable implementation in my classes on the Java platform (Android), I discovered Parcelable, but I was in doubt about the following issues below: 1. When to use (choose from) Parcelable vs. Serializable? 2....

asked on 29.10.2014 / 02:34

3

answers

How do I make a whole division?

Using ruby, the division of two integers is an integer division, that is, the result is an integer. For example: 3/2 => 1 If I want the result to be a decimal number, I can use a floating number instead of an integer: 3.0/2 => 1.5...

asked on 18.02.2014 / 00:00

2

answers

What is a loose comparison?

In documentation of PHP, about switch says: Note : Note that switch / case does loose comparison . What is a loose comparison? And what's the difference between a loose and a rigid comparison?

asked on 26.06.2017 / 19:15

1

answer

What happens in 1 ... 1 in PHP?

On the web I came across the following code snippet: echo 1...1; Resulting in 10.1 . I made the var_dump of it and the return is: string(4) "10.1" Works with variable assignment: $x = 1...1; echo $x; // 10.1 And for o...

asked on 30.05.2017 / 14:31

4

answers

Why are NULL values not selected?

When doing a select, I noticed that data with NULL field is not retrieved using the <> operator. Why does this happen? NULL is equal to char N ? Notice that in the query below only the first row is r...

asked on 17.09.2015 / 19:55

2

answers

Any way to style "parent" element with CSS

Hello, is there any way to select the parent element of another element with CSS? To be more specific, I am studying in localhost using the phpBB3 forums platform, when a message is grateful it gains the .bg1 class (the default being...

asked on 24.04.2014 / 19:03

2

answers

How to change the language of Visual Studio 2017?

If you follow Visual Studio 2017 installation step by step, it installs the operating system language. How do I change the language to English?

asked on 11.03.2017 / 22:45

3

answers

What is the definition of the term coupling?

What is the meaning of the terms high / low coupling in object-oriented systems development or oriented programming to Objects (OOP) ?

asked on 31.03.2014 / 15:10

1

answer

What is the difference between const and readonly?

Constants and read-only fields can not be modified, as can be seen in the documentation: const Fields and constant places are not variables and can not be modified . readonly When a field declaration includes a rea...

asked on 08.09.2016 / 17:17

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