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What are the Ruby Gotchas a newbie should be warned about? [closed]
...1
2 is even
3
4 is even
5
But if I just add comment =anything before the block...
comment = nil
(1..5).each do |number|
comment = " is even" if number%2==0
puts number.to_s + comment.to_s
end
Then I get:
1
2 is even
3 is even
4 is even
5 is even
Basically, when a variable is only defined...
Is there a way to override class variables in Java?
... declare the variable but initialize (change) in the constructor or static block.
The value will get reflected when using in the blocks of parent class
if the variable is static then change the value during initialization itself with static block,
class Son extends Dad {
static {
me =...
What is the difference between a “function” and a “procedure”?
... a Function.
Advanced Differences
Exceptions can be handled by try-catch blocks in a Procedure, whereas a try-catch block cannot be used in a Function.
We can go for Transaction Management in a Procedure, whereas in a Function we can't.
In SQL:
A Procedure allows SELECT as well as DML (INSERT, U...
Structure padding and packing
... 8 bytes long. It will look at the memory as a big row of 8 bytes building blocks. Every time it needs to get some information from the memory, it will reach one of those blocks and get it.
As seem in the image above, doesn't matter where a Char (1 byte long) is, since it will be inside one of th...
How do I add an icon to a mingw-gcc compiled executable?
...ps.
1 VERSIONINFO
FILEVERSION 1,0,0,0
PRODUCTVERSION 1,0,0,0
BEGIN
BLOCK "StringFileInfo"
BEGIN
BLOCK "080904E4"
BEGIN
VALUE "CompanyName", "My Company Name"
VALUE "FileDescription", "My excellent application"
VALUE "FileVersion", "1.0"
VALUE "InternalName",...
Should I instantiate instance variables on declaration or in the constructor?
... handling with the first variant.
There is additionally the initialization block, which is as well put in the constructor(s) by the compiler:
{
a = new A();
}
Check Sun's explanation and advice
From this tutorial:
Field declarations, however, are not part of any method, so they cannot ...
jQuery & CSS - Remove/Add display:none
...
and to show the div:
$('.news').show();
or
$('.news').css('display','block');
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How do I center an SVG in a div?
...
SVG is inline by default. Add display: block to it and then margin: auto will work as expected.
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Ternary operator is twice as slow as an if-else block?
...sed to be faster than, or at least the same as, its equivalent if - else block.
10 Answers
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Is it possible to “await yield return DoSomethingAsync()”
Are regular iterator blocks (i.e. "yield return") incompatible with "async" and "await"?
9 Answers
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