, we can run the program several times, we will find that the results may be 2, or 3, or maybe 4. Because the shared resource count variable does not have any synchronization protection, two goroutine will read and write to it, causing the result to be overwritten with the results that have already been computed, so that the result is incorrect, and here we demonstrate the possibility that two goroutine we call G1 and G2 for the time being.
G1 r
= neuron.incoming[j] local other = network.neurons[incoming.into] sum = sum + incoming.weight * other.value end if #neuron.incoming > 0 then neuron.value = sigmoid(sum) end end local outputs = {} for o=1,Outputs do local button = "P1 " .. ButtonNames[o] if network.neurons[MaxNodes+o].value > 0 then outputs[button] = true else outputs[button] = false end end return outputsendCro
( " *** "))(b). The ability to switch between multiple functions--def consumer (): while True: x=yield Print (x) def producer (): g=consumer () next (g) for in range ( ): g.send (i) producer ()Yeild only switch between programs, no time to re-use any IO operationsGreenlet (third-party module) Program Context SwitchCMD:PIP3 Install module name third-party modules(iii). Greenlet Simple program switching of the process m
A method for summing multiple columns of conditions in an Excel table. First look at a group of sales data, is a shopping mall, different brands of TV three days sales record:
It is now necessary to calculate its three-day sales totals according to the G-List brand.
Must have a cousin already thought the method, since is by the condition sum, uses the SUMIF function to chant:
=SUMIF (B:B,G2,C:C) +sumif (b:b,
., Ltd.". Range ("A2:g2"). Merge (). Range ("A2:g2"). Font.Name = "Blackbody". Range ("A2:g2"). RowHeight = 50. Range ("A2:g2"). Font.Size = 14. Range ("A2:g2"). HAlignment = 2. Range ("A2:g2"). Valignment = 1. Range ("A2:
There is an array of integers, please find out the number of K large in the array according to the idea of quick sorting.
Given an integer array a, given its size n and the K (k between 1 and N) to be found, return the number of K to ensure that the answer exists. Test examples:
[1,3,5,2,2],5,3
Returns: 2
The main idea is to use the fast sort each time can be smaller than a sentinel number on the left, large number on the right side, the code is as follows:
Class Finder {Public:int findkth (ve
source and make a viewmodel.The data source is set to a simple text file (list.txt). Each line, a picture address.The sample code is as follows: Http://img11.360buyimg.com//n3/g2/m00/06/1d/rbegevakffuiaaaaaab54f55qh8aabwrqlxlr0aahn4106.jpgc:\users\soar\ Pictures\lovewallpaper\18451,106.jpghttp://img12.360buyimg.com//n3/g1/m00/06/1d/ rbegdvakffqiaaaaaab0mdavaccaabwrqmcudwaahsw197.jpgc:\users\soar\pictures\lovewallpaper\367448,106.jpghttp:// Img13.360b
still need some help with other basic knowledge,You even need to understand the implementation principles of MySQL, such as slow query and optimization of subqueries..
The select_type field in the SQL Execution Plan shows"DEPENDENT SUBQUERY", It's time to get up!
-- Why is MySQL subquery sometimes bad --
Introduction: Why is this subquery so slow?
The following example shows a slow query. The online execution time is rather exaggerated. Why?
SELECT gid, COUNT (id) as count?
FROM shop_goods
salary, and the level corresponding to the manager's salary.
SELECT e.ename,e.sal,d.dname,g.grade e_grade,s.ename mgr_name,g2.grade m_gradeFROM emp e,dept d,salgrade g,emp s,salgrade g2WHERE (e.deptno=d.deptno) AND (e.sal BETWEEN g.losal AND g.hisal) AND (s.empno=e.mgr) AND (s.sal BETWEEN g2.losal AND g2.hisal);
Authorization + bH87XDtcS94bn7sLTI59H5yr3P1Mq + ac
Number maximum wage for this levelAnalysis: First understand the contents of the salary scale table (Salgrade)SELECT * from Salgrade;Check out each employee's name, salary, department name, salary at the company level (Salgrade)SELECT distinct E.ename,e.sal,d.dname,g.grade e_grade from emp e,dept d,salgrade g,emp swhere (E.deptno=d.deptno) and (E.S Al between G.losal and G.hisal);watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvbwfnateymde=/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/
limit, in F+3iqr and F-3IQR, draw two line segments, called the outer limit. The data represented by a point outside the inner limit is an outlier, where the outliers between the inside and outside limits are mild outliers (mild outliers) and extreme outliers other than outside limits (extreme outliers).4. Draw a segment from each end of the rectangular box until it is not the farthest point of the outliers, indicating the distribution interval of the normal value of the batch data.5. Use "0" t
element in S, K values are obtained through the mapping function {F1,F2.....FK}. {G1,G2.....GK}, and then determine if ARRAY[G1],ARRAY[G2]......ARRAY[GK] is all 1, if all is 1, then item is in S, otherwise item is not in S. This is the implementation principle of the Bron filter. Of course, some readers may ask: even if ARRAY[G1],ARRAY[G2]......ARRAY[GK] is 1, c
\ta3\n"; $str. = "b1\tb2\tb3\n"; you write these characters into a file, and the suffix name is changed to. xls,excel can be read directly.
But actually not the real XLS file.
$query = sqlsrv_query ($conn, $sql), if ($query = = = False) {die (Print_r (Sqlsrv_errors (), True));} while ($row = Sqlsrv_fetch_array ($query)) {Echo$objphpexcel->getactivesheet ()->setcellvalue (' A2 ', convertUTF8 ($row [0])) ->setcellvalue (' B2 ', convertUTF8 ($row [1]))->setcellvalue (' C2 ', convertUTF8 ($r
Background
Due to the heart of openssl recently, I changed the ssl library 1.0.1g. I need to use this library to connect to the server. However, after I find that the Library is replaced, for some domain names, the ssl handshake will fail. In order to find out the cause of failure, we can find the handshaking status in the openssl tool.Tracking the ssl port of the Website 1. Tracking the handshake without any protocol parameters
openssl s_client -connect gmail.com:443CONNECTED(00000003)depth=2 C
Java generates an image and java generates an image.
Public class CreateImage {public static void main (String [] args) throws Exception {int width = 100; int height = 100; String s = "hello "; file file = new File ("/Users/tengxin/Pictures/image.jpg"); Font font = new Font ("Serif", Font. BOLD, 10); BufferedImage bi = new BufferedImage (width, height, BufferedImage. TYPE_INT_RGB); Graphics2D g2 = (Graphics2D) bi. getGraphics ();
process of the first round can be seen as follows: the sum of the weights of the sampled samples is affected by the error rate, and the error rate affects the weight of the basic classifier in the final classifier .Iterative Process 2For m=2, on training data with a weight distribution of D2 = (0.0715, 0.0715, 0.0715, 0.0715, 0.0715, 0.0715, 0.1666, 0.1666, 0.1666, 0.0715), the calculation is available:
When the threshold V is 2.5, the error rate is 0.1666*3 (x
The minimum
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