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Retain cycle on `self` with blocks
...'s no real alternative here. If you're designing your own block-based API, and it makes sense to do so, you could have the block get passed the value of self in as an argument. Unfortunately, this doesn't make sense for most APIs.
Please note that referencing an ivar has the exact same issue. If yo...
Why doesn't java.lang.Number implement Comparable? [duplicate]
...programmers could override. This is no excuse. The same problem exists for Strings when it comes to empty strings or null references. Is a null reference greater than or less than the string "foo"? Sun picked an ordering that makes sense.
– Jason
Dec 2 '15 at 1...
To underscore or to not to underscore, that is the question
... context of the current instance
Example
public class Demo
{
private String name;
public Demo(String name) {
this.name = name;
}
}
Why does the underscore-notation exist?
Some people don't like typing "this", but they still need a way to distinguish a field and a parameter, so ...
how to deal with google map inside of a hidden div (Updated picture)
i have a page and a google map is inside a hidden div at first. I then show the div after i click a link but only the top left of the map shows up.
...
How to get object size in memory? [duplicate]
...(in C#). for example how much my Hashtable , or SortedList , or List<String> .
6 Answers
...
How to style SVG with external CSS?
...I'm not putting the graphics in-line, but storing them in my images folder and pointing to them.
14 Answers
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What is the cleanest way to ssh and run multiple commands in Bash?
...ay have to deal with quoting issues. For instance, if you quote the "limit string" (ie. EOF in the above), then you can't do variable substitutions. But without quoting the limit string, variables are substituted. For example, if you have defined $NAME above in your shell script, you could do
ssh o...
UILabel is not auto-shrinking text to fit label size
...dicating whether the font size should be reduced in order to fit the title string into the label’s bounding rectangle (this property is effective only when the numberOfLines property is set to 1).
When setting this property, minimumScaleFactor MUST be set too (a good default is 0.5).
Swift
var adj...
Why do we need virtual functions in C++?
... virtual modifier on/off to see what happens
//virtual
std::string Says() { return "?"; }
};
class Dog: public Animal
{
public: std::string Says() { return "Woof"; }
};
void test()
{
Dog* d = new Dog();
Animal* a = d; // refer to Dog instance with Animal pointer
...
How to paste yanked text into the Vim command line
...u cannot live without them.
Registers are basically storage locations for strings. Vim has many registers that work in different ways:
0 (yank register: when you use y in normal mode, without specifying a register, yanked text goes there and also to the default register),
1 to 9 (shifting delete ...