Fortune Telling Collection - Horoscope - WeChat Red Packet 5 yuan Random Red Packet Random Amount
WeChat Red Packet 5 yuan Random Red Packet Random Amount
1 demand
Write? Fixed red envelope+random red envelope
A fixed red envelope is every red envelope? Huh? Sample, how many fixed red envelopes do you have? Uh, just? .
The demand for random red envelopes is. ? Like red envelopes? Er, it's 5 yuan, and you need to send a 10 red envelope. The random range is 0.0 1 to 0.99; Five dollars must be paid out. Uh, do you need it? Normal distribution with constant trend.
(0.99 can be specified at will, or it can be AVG * 2-0.01; ? Such as avg = 5/10 = 0.5; ; (average * 2-0.0 1 = 0.99))
2 demand analysis
2. 1 Fixed red envelope
If it is a fixed red envelope, what is the algorithm? Straight line. T is the amount of a fixed red envelope. As shown in the figure.
f(x)= t； ( 1 & lt； = x < = number)
image.png
2.2 random red envelopes
What if we do it? Random function rand. Rand (0.0 1, 0.99); So 10 times random, if the worst case is all? Amount 0.99, total? Uh, 9.9 yuan. Will surpass 5 yuan. ? The amount will also be abnormally distributed. Finally thought of it? With the help of sum mathematical function, can it be used as a random red envelope? Equipment, okay? Parabola, three? Function. Finally, I chose isosceles three? Linear function.
1 algorithm principle
If you need a red envelope, always? The total amount is Money, and the number of red envelopes is num. The range of forehead is [minimum, maximum], linear? The process is shown in the figure.
image.png
Coordinates of three points:
(x 1，y 1) = ( 1，min)
(x2, y2) = (quantity /2, maximum)
(x3, y3) = (number, minimum value)
Deterministic linearity? Cheng:
$ y = 1.0 *(x-$ x 1)/($ x2-$ x 1)*($ y2-$ y 1)+$ y 1； (x 1 & lt； = x & lt= x2)
$ y = 1.0 *(x-$ x2)/($ x3-$ x2)*($ y3-$ y2)+$ y2； (x2 & lt= x & lt= x3)
Maintenance data:
Y (total) = y1+y2+y3+... ynum;
Y (combination) may be > TotalMoney, explain? Become? If the number is too large and the data needs to be modified, multiply it by 0.0 1, y2, y3...ynum. Until y (total) = totalMoney.
Y (together) may be < TotalMoney, explain? Become? If the number is small and the data needs to be modified, add 0.01,y2, y3) from (y 1 ... ynum) each time. Until y (total) = totalMoney.
2 example of algorithm principle
If you need a red envelope, always? The amount is 1 1470, and the number of red envelopes is 7400. The range of the amount is [0.0 1, 3.09], linear? The process is shown in the figure.
image.png
3 Demand design
3. 1 class diagram design
image.png
3.2 Source Code Design
/**
* random red envelope+fixed red envelope algorithm [strategy mode]
*/
//Configure DTO for transmitting data.
Category options
{
//Red envelopes? forehead
Total public funds;
//Number of red envelopes
Public $ num
//range start
public $ rangeStart
//Range settlement
public $ rangeEnd
//? Red envelope strategy
public $ builderStrategy
//Random Red Packet Residual Rule
Public $ rand format type//can _ left: data can be left without repair; No_Left: there cannot be a public static function create ($ totalmoney, $ num, $ rangestart, $ rangeend, $ builder strategy, $ rand format =' no _ left').
{
$self = new self ();
$ self->； num = $ num
$ self->； rangeStart = $ rangeStart
$ self->； rangeEnd = $ rangEnd
$ self->； totalMoney = $ totalMoney
$ self->； builder strategy = $ builder strategy；
$ self->； randFormatType = $ randFormatType；
Return to $ self
}
}
//Red envelopes? Complete the device connection?
Interface construction strategy
{
//Create a red envelope
Public function create ();
//Set the configuration
Common function setoption (options to $ option);
//Is that all right? Turn into a red envelope
Common function iscanbuilder ();
//? Red envelope function
Common function FX ($ x);
}
//Fixed equal red envelope strategy
EqualPackageStrategy class implements IBuilderStrategy {
//A single red envelope? forehead
Public $ oneMoney
//quantity
Public $ num
public function _ _ construct($ option = null)
{
if($ option instance of options to)
{
$ this-& gt； setOption($ option)；
}
}
Common function setOption(options to $ option)
{
$ this-& gt； one money = $ option-& gt； rangeStart
$ this-& gt； num = $ option-& gt； num
}
Public function create ()
{
$ data = array()；
if(false = = $ this-& gt； isCanBuilder())
{
Return to $ data
}
$ data = array()；
if(false = = is _ int(＄this-& gt； num)| | $ this-& gt； num & lt= 0) {
Return to $ data
}
for($ I = 1； $ i & lt= $ this-& gt； num$i++)
{
$ data[$ I]= $ this-& gt； Foreign exchange (USD);
}
Return to $ data
}
/**
* Equal red envelopes? Cheng is? straight line
*
* @param mixed $x
* @ Access to the public
* @ returns void
*/
Common function fx($x)
{
return $ this-& gt； oneMoney
}
/**
* Can you handle the red envelope?
*
* @ Access to the public
* @ returns void
*/
Common function isCanBuilder ()
{
if(false = = is _ int(＄this-& gt； num)| | $ this-& gt； num & lt= 0)
{
Returns false
}
if(false = = is _ numeric(＄this-& gt； one money)| | $ this-& gt； oneMoney & lt= 0)
{
Returns false
}
//A single red envelope? At 1
If ($ this->; oneMoney & lt0.0 1)
{
Returns false
}
Return true
}
}
//Random red envelope strategy (3? Shape)
RandTrianglePackageStrategy class implements IBuilderStrategy
{
//Total amount
Total public funds;
//Number of red envelopes
Public $ num
//What is the most random red envelope? value
Public $ TERM min money
//What is the most random red envelope? value
Public $ maxMoney
//Repair data? Formula: NO_LEFT: total amount of red envelopes = total budget; CAN_LEFT: total amount of red envelopes.
//Budget surplus? forehead
public $ leftMoney
public function _ _ construct($ option = null)
{
if($ option instance of options to)
{
$ this-& gt； setOption($ option)；
}
}
Common function setOption(optionadto $ option){) (
$ this-& gt； total money = $ option-& gt； Total amount of money;
$ this-& gt； num = $ option-& gt； num
$ this-& gt； format type = $ option-& gt； randFormatType$ this-& gt； min money = $ option-& gt； rangeStart
$ this-& gt； maxMoney = $ option-& gt； rangeEnd
$ this-& gt； left money = $ this-& gt； Total amount of money;
}
/**
* Create random red envelopes
*
* @ Access to the public
* @ returns void
*/
Public function create ()
{
$ data = array()；
if(false = = $ this-& gt； isCanBuilder())
{
Return to $ data
}
$ left money = $ this-& gt； leftMoney
for($ I = 1； $ i & lt= $ this-& gt； num$i++)
{
$ data[$ I]= $ this-& gt； Foreign exchange (USD);
$ left money = $ left money-$ data[$ I]；
}
//repair data
list($okLeftMoney，$ ok data)= $ this-& gt； Format ($leftMoney, $ data);
//Random sorting
shuffle($ ok data)；
$ this-& gt； leftMoney = $ okLeftMoney
Return to $ okData
}
/**
* Can I give out red envelopes at random?
* @ Access to the public
* @ returns void
*/
Common function isCanBuilder ()
{
if(false = = is _ int(＄this-& gt； num)| | $ this-& gt； num & lt= 0)
{
Returns false
}
if(false = = is _ numeric(＄this-& gt； total money)| | $ this-& gt； totalMoney <= 0) {
Returns false
}
//average value
$ avg money = $ this-& gt； total money/ 1.0/$ this-& gt； num
//mean? Most? value
if($ avg money & lt； $ this-& gt； minMoney)
{
Returns false
}
Return true
}
/**
* Get the rest? forehead
* @ Access to the public
Public function getLeftMoney ()
{
return $ this-& gt； leftMoney
}
/**
* Random red envelopes? Into a function. Three? Function. [( 1，0.0 1)，($num/2，$avgMoney)，($num，0.0 1)] * @param mixed $x， 1 & lt； = $ x & lt= $ this-& gt； num
* @ Access to the public
* @ returns void
*/
Common function fx($x)
{
if(false = = $ this-& gt； isCanBuilder())
{
Returns 0;
}
if($ x & lt； 1 | | $ x & gt； $ this-& gt； Numbers)
{
Returns 0;
}
$ x 1 = 1；
$ y 1 = $ this-& gt； Mimoni;
//intermediate point
$ x2 = ceil($ this-& gt； num/ 1.0/2)；
//My peak
$ y2 = $ this-& gt； maxMoney
//Last point
$ x3 = $ this-& gt； num
$ y3 = $ this-& gt； Mimoni;
//When X 1, X2 and X3 are both 1 (vertical lines).
if($ x 1 = = $ x2 & amp； & amp$x2 == $x3)
{
//'/_ \' Three? Linear? travel
//'/'section
if($x 1！ = $ x2 & amp& amp$ x & gt= $ x 1 & amp； & amp$ x & lt= $x2)
{
、y = 1.0 *(x-$ x 1)/($ x2-$ x 1)*($ y2-$ y 1)+$ y 1； Returns number_format($y, 2,'.','');
}
//'\' shape
if($x2！ = $ x3 & amp& amp$ x & gt= $ x2 & amp& amp$ x & lt= $x3)
{
$ y = 1.0 *(x-$ x2)/($ x3-$ x2)*($ y3-$ y2)+$ y2； Returns number_format($y, 2,'.','');
}
Returns 0;
}
/**
* format to repair red envelope data
*
* @param mixed $leftMoney
* @param array $ data
* @ Access to the public
* @ returns void
*/
Private function format ($leftMoney, array $data)
{
//You can't just give out red envelopes.
if(false = = $ this-& gt； isCanBuilder())
{
Returns an array ($leftMoney, $ data);
}
//The remaining red envelopes are 0.
if(0 == $leftMoney) //？ Need maintenance data
Returns an array ($leftMoney, $ data);
}
//The array is empty
if(count($ data)& lt； 1)
{
Returns an array ($leftMoney, $ data);
}
//If there is a surplus and $ leftmoney >; 0
if(' Can _ Left ' = = $ this-& gt； Format type
& amp& amp$ leftMoney & gt0)
{
Returns an array ($leftMoney, $ data);
}
//If there is any money left, try to add it to? Red envelopes? Try it if you don't add it? a . while(＄left money & gt； 0)
{
$ found = 0；
foreach($ data as $ key = & gt； $val)
{
//Reduce cycle optimization
if($ left money & lt； = 0)
{
Break;
}
//prejudge
$ afterLeftMoney =(double)$ left money-0.0 1；
$ after val =(double)$ val+0.0 1；
if($ afterLeftMoney & gt； = 0 & amp& amp$ afterVal & lt= $ this-& gt； maxMoney)
{
$ found = 1；
$ data[$ key]= number _ format($ after val，2，'.','');
$ leftMoney = $ afterLeftMoney
//Accuracy
}
}
//If there is no red envelope to add, you need to finish it, otherwise the infinite loop ends.
//In other words, every red envelope won't have money. For example, red envelopes are already the most? Value. At this time, you must give a sign when you part. Infinite loop. if($found == 0)
{
Break;
}
}
//If $ leftmoney
while(＄left money & lt； 0)
{
$ found = 0；
foreach($ data as $ key = & gt； $val)
{
if($ left money & gt； = 0)
{
Break;
}
//prejudge
$ afterLeftMoney =(double)$ left money+0.0 1；
$ after val =(double)$ val-0.0 1；
if($ afterLeftMoney & lt； = 0 & amp& amp$ afterVal & gt= $ this-& gt； minMoney)
{
$ found = 1；
$ data[$ key]= number _ format($ after val，2，'.','');
$ leftMoney = $ afterLeftMoney
$ left money = number _ format($ left money，2，'.','');
}
}
//If? If there is no reduced red envelope, it needs to end, otherwise it is an infinite loop.
if($found == 0)
{
}
}
Returns an array ($leftMoney, $ data);
}
}
//Maintain the environment class of the policy.
RedPackageBuilder class
{
//Example
Protected static $ _ instance = null
/**
* Single instance (obtained instance)
*
* @return MemcacheOperate
*/
Public static function getInstance ()
{
if (null === self::$_instance)
{
self::$ _ instance = new self()；
}
Return self::$ _ instance；;
}
/**
* Develop a strategy? show
*
* @param string $type type
* @ returns void
*/
Public function getBuilderStrategy($type) {
$class = $type。 "packaging strategy";
if(class_exists($class))
Returns a new $ class ();
}
other
{
Thrownnewexception ("{$ class} class does not exist! " );
}
}
The public function getredpackagebydto (option adto $ option dto)
{
//get policy
$ builder strategy = $ this-& gt； getBuilderStrategy($ options to-& gt； builder strategy)； //Set parameters
$ builder strategy-& gt； setOption($ option dto)；
return $ builder strategy-& gt； create()；
}
}
Category client
{
Common static function main($argv)
{
//Fixed red envelope
$ dto = option dto:: create (1000,10, 100, 100,' equal to');
$ data = RedPackageBuilder::getInstance()-& gt； getRedPackageByDTO($ dto)；
//print _ r($ data)；
//Random Red Packet [Repair Data]
$dto = OptionDTO::create(5， 10，0.0 1，0.99，' rand triangle ')；
$ data = RedPackageBuilder::getInstance()-& gt； getRedPackageByDTO($ dto)； print _ r($ data)；
//Random red envelope [No data repair]
$dto = OptionDTO::create(5， 10，0.0 1，0.99，' RandTriangle '，' Can _ Left ')；
$ data = RedPackageBuilder::getInstance()-& gt； getRedPackageByDTO($ dto)；
//print _ r($ data)；
}
￥
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Detailed explanation and algorithm code of WeChat red envelope random number _ WeChat red envelope random number
Detailed explanation and algorithm code of WeChat red envelope random number _ WeChat red envelope random number
1 demand
Write? Fixed red envelope+random red envelope
A fixed red envelope is every red envelope? Huh? Sample, how many fixed red envelopes do you have? Uh, just? .
The demand for random red envelopes is. ? Like red envelopes? Er, it's 5 yuan, and you need to send a 10 red envelope. The random range is 0.0 1 to 0.99; Five dollars must be paid out. Uh, do you need it? Normal distribution with constant trend.
(0.99 can be specified at will, or it can be AVG * 2-0.01; ? Such as avg = 5/10 = 0.5; ; (average * 2-0.0 1 = 0.99))
Page 1
2 demand analysis
2. 1 Fixed red envelope
If it is a fixed red envelope, what is the algorithm? Straight line. T is the amount of a fixed red envelope. As shown in the figure.
f(x)= t； ( 1 & lt； = x < = number)
image.png
2.2 random red envelopes
What if we do it? Random function rand. Rand (0.0 1, 0.99); So 10 times random, if the worst case is all? Amount 0.99, total? Uh, 9.9 yuan. Will surpass 5 yuan. ? The amount will also be abnormally distributed. Finally thought of it? With the help of sum mathematical function, can it be used as a random red envelope? Equipment, okay? Parabola, three? Function. Finally, I chose isosceles three? Linear function.
page 2
1 algorithm principle
If you need a red envelope, always? The total amount is Money, and the number of red envelopes is num. The range of forehead is [minimum, maximum], linear? The process is shown in the figure.
image.png
Coordinates of three points:
(x 1，y 1) = ( 1，min)
(x2, y2) = (quantity /2, maximum)
(x3, y3) = (number, minimum value)
Deterministic linearity? Cheng:
$ y = 1.0 *(x-$ x 1)/($ x2-$ x 1)*($ y2-$ y 1)+$ y 1； (x 1 & lt； = x & lt= x2)
Page 3
$ y = 1.0 *(x-$ x2)/($ x3-$ x2)*($ y3-$ y2)+$ y2； (x2 & lt= x & lt= x3)
Maintenance data:
Y (total) = y1+y2+y3+... ynum;
Y (combination) may be > TotalMoney, explain? Become? If the number is too large and the data needs to be modified, multiply it by 0.0 1, y2, y3...ynum. Until y (total) = totalMoney.
Y (together) may be < TotalMoney, explain? Become? If the number is small and the data needs to be modified, add 0.01,y2, y3) from (y 1 ... ynum) each time. Until y (total) = totalMoney.
Page 4
2 example of algorithm principle
If you need a red envelope, always? The amount is 1 1470, and the number of red envelopes is 7400. The range of the amount is [0.0 1, 3.09], linear? The process is shown in the figure.
image.png
3 Demand design
3. 1 class diagram design
image.png
3.2 Source Code Design
/**
* random red envelope+fixed red envelope algorithm [strategy mode]
Page 5
*/
//Configure DTO for transmitting data.
Category options
{
//Red envelopes? forehead
Total public funds;
//Number of red envelopes
Public $ num
//range start
public $ rangeStart
Page 6
//Range settlement
public $ rangeEnd
//? Red envelope strategy
public $ builderStrategy
//Random Red Packet Residual Rule
Public $ rand format type//can _ left: data can be left without repair; No_Left: there cannot be a public static function create ($ totalmoney, $ num, $ rangestart, $ rangeend, $ builder strategy, $ rand format =' no _ left').
Page 7
{
$self = new self ();
$ self->； num = $ num
$ self->； rangeStart = $ rangeStart
$ self->； rangeEnd = $ rangEnd
$ self->； totalMoney = $ totalMoney
$ self->； builder strategy = $ builder strategy；
$ self->； randFormatType = $ randFormatType；
Return to $ self
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