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How does autowiring work in Spring?
...
@Autowired is an annotation introduced in Spring 2.5, and it's used only for injection.
For example:
class A {
private int id;
// With setter and getter method
}
class B {
private String name;
@Autowired // Here we are injecting instance of Class A i...
100% Min Height CSS layout
... the content */
background-color: skyblue;
min-height: calc(100vh - 2.5em); /* this leaves space for the sticky footer */
}
footer {
/* for debugging, a gray background lets us see the footer */
background-color: gray;
min-height:2.5em;
}
<main>
<p>This is the...
What is the Ruby (spaceship) operator?
...t;=> 1; // 1
// Floats
echo 1.5 <=> 1.5; // 0
echo 1.5 <=> 2.5; // -1
echo 2.5 <=> 1.5; // 1
// Strings
echo "a" <=> "a"; // 0
echo "a" <=> "b"; // -1
echo "b" <=> "a"; // 1
echo "a" <=> "aa"; // -1
echo "zz" <=> "aa"; // 1
// Arrays
echo [] <...
Does Python have a ternary conditional operator?
...
Yes, it was added in version 2.5. The expression syntax is:
a if condition else b
First condition is evaluated, then exactly one of either a or b is evaluated and returned based on the Boolean value of condition. If condition evaluates to True, then a i...
switch() statement usage
...re's showing how versatile switch is:
switch(type, case1=1, case2=, case3=2.5, 99)
This maps case2 and case3 to 2.5 and the (unnamed) default to 99. For more information, try ?switch
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impr...
Relative paths in Python
... directly. If so, that doesn't appear to be the case on my system (python 2.5.1 on OS X 10.5.7):
#foo.py
import os
print os.getcwd()
print __file__
#in the interactive interpreter
>>> import foo
/Users/jason
foo.py
#and finally, at the shell:
~ % python foo.py
/Users/jason
foo.py
Howe...
What is the max size of localStorage values?
... Doesn't crash Chrome anymore... Interesting point: 5MB equals 2.5 Million chars on Chrome. So apparently, UFT16 is used for localStore.
– Felix Alcala
Sep 3 '11 at 17:10
...
How to create a GUID/UUID in Python
...
The uuid module, in Python 2.5 and up, provides RFC compliant UUID
generation. See the module docs and the RFC for details. [source]
Docs:
Python 2: http://docs.python.org/2/library/uuid.html
Python 3:
https://docs.python.org/3/library/uuid.html...
Javascript seconds to minutes and seconds
...
2019 best variant
Format hh:mm:ss
console.log(display(60 * 60 * 2.5 + 25)) // 2.5 hours + 25 seconds
function display (seconds) {
const format = val => `0${Math.floor(val)}`.slice(-2)
const hours = seconds / 3600
const minutes = (seconds % 3600) / 60
return [hours, min...
What are the differences between numpy arrays and matrices? Which one should I use?
...3]])
>>> mm = m.mean(1)
>>> mm
matrix([[ 1.5],
[ 2.5]])
>>> mm.shape
(2, 1)
>>> m - mm
matrix([[-0.5, 0.5],
[-0.5, 0.5]])
with array
>>> a = np.array([[1,2],[2,3]])
>>> a
array([[1, 2],
[2, 3]])
>>> am = a.mea...