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Instance variable: self vs @
...class that always reports its age 10 years younger than it actually is. Or more practically, a PersistentPerson class might lazily read that data from a persistent store, cache all its persistent data in a hash.
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How to secure database passwords in PHP?
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What's the advantage of a Java enum versus a class with public static final fields?
I am very familiar with C# but starting to work more in Java. I expected to learn that enums in Java were basically equivalent to those in C# but apparently this is not the case. Initially I was excited to learn that Java enums could contain multiple pieces of data which seems very advantageous ( ht...
JUnit vs TestNG [closed]
...the decision, it is pretty trivial to run both. TestNG strives to be much more configurable than JUnit, but in the end they both work equally well.
TestNG has a neat feature where you can mark tests as a particular group, and then easily run all tests of a specific group, or exclude tests of a par...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...low arbitrary number of arguments to functions as described in the section more on defining functions in the Python documentation.
The *args will give you all function parameters as a tuple:
def foo(*args):
for a in args:
print(a)
foo(1)
# 1
foo(1,2,3)
# 1
# 2
# 3
The **kwa...
Split a List into smaller lists of N size
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CSS selector for first element with class
...8, by simply supplying a type selector instead of a class selector (again, more on its incorrect usage here in a later section):
article > p {
/* Apply styles to article > p:first-of-type, which may or may not be :first-child */
}
article > p ~ p {
/* Undo the above styles for eve...
How do you comment out code in PowerShell?
...wershell
In PowerShell V2 <# #> can be used for block comments and more specifically for help comments.
#REQUIRES -Version 2.0
<#
.SYNOPSIS
A brief description of the function or script. This keyword can be used
only once in each topic.
.DESCRIPTION
A detailed description of...
Inserting HTML elements with JavaScript
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this is way more complex than it needs to be - sime vidas's answer is much better
– JonnyRaa
Feb 5 '15 at 16:48
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entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
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