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iPhone/iOS JSON parsing tutorial [closed]
...late the rows of a UITableView (assuming it converts the JSON into an NSArray first).
6 Answers
...
What is a NullPointerException, and how do I fix it?
...y happens when using . to access a method or field, or using [ to index an array.
If you attempt to dereference num BEFORE creating the object you get a NullPointerException. In the most trivial cases, the compiler will catch the problem and let you know that "num may not have been initialized," but...
Glorified classes in the Java language
...timeException and Error.
NullPointerException and other exceptions such as ArrayIndexOutOfBounds which can be thrown by other bytecode instructions than athrow.
Interfaces
Iterable - the only interface that can be used in an enhanced for loop
Honorable mentions goes to:
java.lang.reflect.A...
What does curly brackets in the `var { … } = …` statements do?
...uring:
Destructuring assignment makes it possible to extract data from arrays or objects using a syntax that mirrors the construction of array and object literals.
...
One particularly useful thing you can do with destructuring assignment is to read an entire structure in a single statement,...
Null vs. False vs. 0 in PHP
... code path!
Lastly, here's some fun with type juggling. not even including arrays or objects.
var_dump( 0<0 ); #bool(false)
var_dump( 1<0 ); #bool(false)
var_dump( -1<0 ); #bool(true)
var_dump( false<0 ); #bool(false)
var_dump( null<0 ); #bool(false)
var_dum...
Plotting a list of (x, y) coordinates in python matplotlib
...
For a 2-column numpy array, plt.scatter( * xy.T ) works: short and obscure for x, y = xy.T; plt.scatter( x, y )
– denis
Jul 14 '16 at 16:43
...
Split string to equal length substrings in Java
...
Here's the regex one-liner version:
System.out.println(Arrays.toString(
"Thequickbrownfoxjumps".split("(?<=\\G.{4})")
));
\G is a zero-width assertion that matches the position where the previous match ended. If there was no previous match, it matches the beginning of t...
Android global variable
... we need to know what to keep inside the Singleton, If we keep huge bitmap array's or some collections then it may become dangerous. Keep note of what you keep inside the Singleton.
– Lalith B
Dec 24 '14 at 3:35
...
Reading a List from properties file and load with spring annotation @Value
...Value("${my.list.of.strings}")
private String[] myString;
You can get the arrays of strings. And using CollectionUtils.addAll(myList, myString), you can get the list of strings.
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Undocumented NSURLErrorDomain error codes (-1001, -1003 and -1004) using StoreKit
...
I use the following method in my project
-(NSArray*)networkErrorCodes
{
static NSArray *codesArray;
if (![codesArray count]){
@synchronized(self){
const int codes[] = {
//kCFURLErrorUnknown, //-998
//kCFURL...