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Removing viewcontrollers from navigation stack
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Use this code and enjoy:
NSMutableArray *navigationArray = [[NSMutableArray alloc] initWithArray: self.navigationController.viewControllers];
// [navigationArray removeAllObjects]; // This is just for remove all view controller from navigation stack.
[nav...
What are the options for storing hierarchical data in a relational database? [closed]
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If your database supports arrays, you can also implement a lineage column or materialized path as an array of parent ids.
Specifically with Postgres you can then use the set operators to query the hierarchy, and get excellent performance with GIN ind...
What is the coolest thing you can do in
...:
$x = 200;
$y = 200;
$gd = imagecreatetruecolor($x, $y);
$corners[0] = array('x' => 100, 'y' => 10);
$corners[1] = array('x' => 0, 'y' => 190);
$corners[2] = array('x' => 200, 'y' => 190);
$red = imagecolorallocate($gd, 255, 0, 0);
for ($i = 0; $i < 100000; $i++) {
i...
UTF-8 byte[] to String
...redInputStream to read the bytes of a UTF-8 encoded text file into a byte array. I know that I can use the following routine to convert the bytes to a string, but is there a more efficient/smarter way of doing this than just iterating through the bytes and converting each one?
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
...get each character to examine it. Since the String is implemented with an array, the charAt() method is a constant time operation.
String s = "...stuff...";
for (int i = 0; i < s.length(); i++){
char c = s.charAt(i);
//Process char
}
That's what I would do. It seems the easi...
How to create custom easing function with Core Animation?
...re steps, the smoother the animation)
NSUInteger steps = 100;
NSMutableArray *values = [NSMutableArray arrayWithCapacity:steps];
double time = 0.0;
double timeStep = 1.0 / (double)(steps - 1);
for(NSUInteger i = 0; i < steps; i++) {
double value = fromValue + (block(time) * (toValue...
How to use z-index in svg elements?
...t the SVG DOM elements.
var circles = d3.selectAll('circle')
Create some array of z-indices with a 1:1 relationship with your SVG elements (that you want to reorder). Z-index arrays used in the examples below are IDs, x & y position, radii, etc....
var zOrders = {
IDs: circles[0].map(func...
conversion from string to json object android
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what if the string is an array of JSON objects? Like "[{},{},{}]"
– Francisco Corrales Morales
Jun 17 '14 at 23:18
3
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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...记录下来，以便为其提供更新的数据。Strings 是一个System.Array，用于接收RTD函数传入的参数（String 1...String n），这是一个引用类型的参数。GetNewValues用于确定是否总是获取最新数据，如果这个参数传入true，则每次保存Excel文档以...
Force CloudFront distribution/file update
...3 currently only included one item per notification, ie, the length of the array is happily always 1, and consequently, even if you upload multiple files in one go, you get an entirely new notification per file. You do not get a notification for the whole bucket in any case. None-the-less, this c...