loops

问题 From what I understand, spacial locality has to do with nearby memory being used in the nearby future. However I was wondering if a loop is executed many times, does this lead to good spacial locality? Thanks in advance, and sorry if I'm hard to understand. 回答1: The number of iterations of a loop doesn't necessarily affect spatial locality. What the loop is doing does. In practice, the key to spatial locality really has to do with cache lines. In simple terms, a program that limits its

问题 i am trying to develop a security application on Android and i want to iterate through the filenames of a specific directory so that i can compare the hash value of each file in the directory. I have already found out how to do the hashing but for the iterating part i am confused on how it works. 回答1: You mean you want to traverse a directory recursively? Something like this: public void traverse (File dir) { if (dir.exists()) { File[] files = dir.listFiles(); for (int i = 0; i < files.length

问题 i am trying to develop a security application on Android and i want to iterate through the filenames of a specific directory so that i can compare the hash value of each file in the directory. I have already found out how to do the hashing but for the iterating part i am confused on how it works. 回答1: You mean you want to traverse a directory recursively? Something like this: public void traverse (File dir) { if (dir.exists()) { File[] files = dir.listFiles(); for (int i = 0; i < files.length

问题 I am trying to create a drop down menu with the options of 1,2,3 and 4. The below code is what I am using just now and the dropdown is empty. Any idea what I am doing wrong? <select name="years"> <?php for($i=1; $i<=4; $i++) { "<option value=".$i.">".$i."</option>"; } ?> <option name="years"> </option> </select> <input type="submit" name="submitYears" value="Year" /> 回答1: You are not outputting the option tags. Try it like this: <select name="years"> <?php for($i=1; $i<=4; $i++) { echo "

问题 I am trying to create a drop down menu with the options of 1,2,3 and 4. The below code is what I am using just now and the dropdown is empty. Any idea what I am doing wrong? <select name="years"> <?php for($i=1; $i<=4; $i++) { "<option value=".$i.">".$i."</option>"; } ?> <option name="years"> </option> </select> <input type="submit" name="submitYears" value="Year" /> 回答1: You are not outputting the option tags. Try it like this: <select name="years"> <?php for($i=1; $i<=4; $i++) { echo "

问题 i don't know if my problem description is accurate, but basically i have this: Since I'm working with positions here, each position comes in a pair. I want to loop through the whole list down and calculate the difference in value in each position pair (so i want to find the loss or the gain), and return it to another cell. here the difference between the 1st position pair is 14688, the following is another position. I've done a short code here to try to get the logic right, but it definitely

问题 int n; for ( n = 0; i >0; n++) { i &= (i-1); } return n; //maybe its function is to count the number of 1, I don't know the sentence means 回答1: This is indeed counting the number of one-bits in the value of i. It does however only work properly for positive values. The JRE provided Integer.bitCount(i) does the same and it works in constant time as well as for negative values. As for how it works, its hard to understand if you're not familar with binary arithmetic. What basically happens that

问题 I have a method as a request in soapUI. it transfers data to an online platform. i have different variables which are with different contet each time. is there a way how i can loop the request with different contet each time? i tried to somehow connect the request to a groovy script in order to programm the loopthere but couldent figure out how to do it the goal is to have for example a cvs file where for example 100 addresses are saved. then have all the data tranfered. but all the data

问题 I have a method as a request in soapUI. it transfers data to an online platform. i have different variables which are with different contet each time. is there a way how i can loop the request with different contet each time? i tried to somehow connect the request to a groovy script in order to programm the loopthere but couldent figure out how to do it the goal is to have for example a cvs file where for example 100 addresses are saved. then have all the data tranfered. but all the data

问题 I have two lists of numbers, say [1, 2, 3, 4, 5] and [7, 8, 9, 10, 11] , and I would like to form a new list which consists of the products of each member in the first list with each member in the second list. In this case, there would be 5*5 = 25 elements in the new list. I have been unable to do this so far with a while() loop. This is what I have so far: x = 0 y = 99 results = [] while x < 5: x = x + 1 results.append(x*y) while y < 11: y = y + 1 results.append(x*y) 回答1: Wht dont you try