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Co-variant array conversion from x to y may cause run-time exception
...
What it means is this
Control[] controls = new LinkLabel[10]; // compile time legal
controls[0] = new TextBox(); // compile time legal, runtime exception
And in more general terms
string[] array = new string[10];
object[] objs = array; // legal at compile time
objs[0] = new Foo(...
How can I add additional PHP versions to MAMP
...g, for me this meant adding an "X" to my /Applications/MAMP/bin/php/php5.4.10_X folder. Now 5.2.17 and 5.3.20 show up in the mamp prefs.
Done!
Edit - if the PHP version you require isn't in the PHP folder, you can download the version you require from http://www.mamp.info/en/downloads/
Edit - MAM...
Mongodb Explain for Aggregation framework
...tionStats"
– Kanagavelu Sugumar
Jan 10 '17 at 7:31
1
@KanagaveluSugumar I've updated the answer w...
Can you supply arguments to the map(&:method) syntax in Ruby?
...w(c d)].map(&:inject.with(&:+))
# => ["ab", "cd"]
[(1..5), (6..10)].map(&:map.with(&:*.with(2)))
# => [[2, 4, 6, 8, 10], [12, 14, 16, 18, 20]]
Here is a conversation I had with @ArupRakshit explaining it further:
Can you supply arguments to the map(&:method) syntax in R...
Memcache(d) vs. Varnish for speeding up 3 tier web architecture
...ching to begin with. Remembering to invalidate all affected pages may be a bit of an issue). All the comments, however, are still in Memcache, so the database only has to write this comment. Nothing else needs to be done by the database to generate the page. All the comments are pulled by Memcache, ...
Python concatenate text files
...
10
This will, for large files, be very memory inefficient.
– Gareth Latty
Nov 28 '12 at 20:06
...
How to dynamically create CSS class in JavaScript and apply?
...);
}
createClass('.whatever',"background-color: green;");
And this final bit applies the class to an element:
function applyClass(name,element,doRemove){
if(typeof element.valueOf() == "string"){
element = document.getElementById(element);
}
if(!element) return;
if(doRemov...
Combining CSS Pseudo-elements, “:after” the “:last-child”
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This is a bit of a "nit-picker's corner", but "last-child" is actually a pseudo-class, while "before" and "after" are pseudo-elements. The difference is that a pseudo-class is an additional constraint on an existing element, while a ps...
Determine if the device is a smartphone or tablet? [duplicate]
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This answer is good but possibly a bit dated since values-xlarge is now being deprecated.Using /res/values and /res/values-sw600 as the folders to store these values in may be a better solution. sw600 means "smallest width 600". If the size of the smallest d...
What does %s mean in a python format string?
What does %s mean in Python? And what does the following bit of code do?
7 Answers
7...