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Add legend to ggplot2 line plot
...t each line is given a color by mapping the colour aesthetic to a constant string. Choosing the string which is what you want to appear in the legend is the easiest. The fact that in this case it is the same as the name of the y variable being plotted is not significant; it could be any set of strin...
Disable cache for some images
...ls like a hack but is fairly portable is to add a randomly generated query string to each request for the dynamic image.
So, for example -
<img src="image.png" />
Would become
<img src="image.png?dummy=8484744" />
Or
<img src="image.png?dummy=371662" />
From the point of ...
Design RESTful query API with a long list of query parameters [closed]
...have accepted the practice that a GET with too long or too complex a query string (e.g. query strings don't handle nested data easily) can be sent as a POST instead, with the complex/long data represented in the body of the request.
Look up the spec for POST in the HTTP spec. It's incredibly broad....
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
... in Visual Studio 2017 see the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was thrown.
To underst...
What is the difference between inversedBy and mappedBy?
...eratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="task", type="string", length=255)
*/
private $task;
/**
* @var \DateTime
*
* @ORM\Column(name="dueDate", type="datetime")
*/
private $dueDate;
...
Python __str__ versus __unicode__
...ck with them for compatibility reasons. Generally, you should put all your string formatting in __unicode__(), and create a stub __str__() method:
def __str__(self):
return unicode(self).encode('utf-8')
In 3.0, str contains characters, so the same methods are named __bytes__() and __str__(). ...
What is CDATA in HTML? [duplicate]
...created by others over which we have no control? Or just resort to manual string fiddling?
– user2895783
Jun 9 '16 at 11:07
1
...
Why does Enumerable.All return true for an empty sequence? [duplicate]
The code creates an empty collection of string, then tries to determine if all the elements in the collection are "ABC".
If you run it, b will be true.
...
Learning Python from Ruby; Differences and Similarities
...rate using multiple indexes. For example, to find all the palindromes in a string (assuming you have a function p() that returns true for palindromes), all you need is a single list comprehension:
s = 'string-with-palindromes-like-abbalabba'
l = len(s)
[s[x:y] for x in range(l) for y in range(x,l+1...
How to implement a unique index on two columns in rails
...rançoisBeausoleil %w(user_id content_id) in ruby just creates an array of strings, it's not special to rails. You can do the same with "user_id content_id".split which is still creating an array of strings. I am sure you know this, this comment is just so other readers don't relate this to rails in...