numbers

问题 If I have a variable that is given a "numeric" value from a PHP echo ... var names_each = <?php echo $ind_name_each; ?>; ...and $ind_name_each is derived from a MySQL column of type decimal(5,2) , is it a number or a string in JavaScript? if all_total = 6.00 and names_each = 5.00 and I do this: all_total = parseInt(names_each) + all_total; I get 56.00 all_total = names_each + all_total; I get 5.006.00 all_total = parseFloat(names_each) + all_total; I get 56.00 I need some understanding here.

问题 My folder structure is as follows Folder A Folder B1 Folder B2 .... Folder Bn How can I count the number of files in each of the folders (Folder B1 - Folder Bn), check if the number of files is larger than a given limit and print the folder name and number of files in it on the screen? Like this: Folders with too many files: Folder B3 101 Folder B7 256 Here's what I've tried so far. It goes through every subfolder in each of my Folder B1 etc. I just need file count in one level. import os,

问题 I'm working on a program that converts between number bases. For example Octal is 8, decimal is 10. Letters A to Z could be considered as base 26. I want to convert a number like "A" into 0, Z into 25, "AA" into 27 and "BA" into 53. Before I start coding I'm doing it on paper so I understand the process. To start out I'm trying to convert 533 to base 26. What algorithm is best for doing this? 回答1: You need to assign a "digit" to each letter, like: A = 0 N = 13 B = 1 O = 14 C = 2 P = 15 D = 3

问题 I'm working on a program that converts between number bases. For example Octal is 8, decimal is 10. Letters A to Z could be considered as base 26. I want to convert a number like "A" into 0, Z into 25, "AA" into 27 and "BA" into 53. Before I start coding I'm doing it on paper so I understand the process. To start out I'm trying to convert 533 to base 26. What algorithm is best for doing this? 回答1: You need to assign a "digit" to each letter, like: A = 0 N = 13 B = 1 O = 14 C = 2 P = 15 D = 3

问题 I'm working on a program that converts between number bases. For example Octal is 8, decimal is 10. Letters A to Z could be considered as base 26. I want to convert a number like "A" into 0, Z into 25, "AA" into 27 and "BA" into 53. Before I start coding I'm doing it on paper so I understand the process. To start out I'm trying to convert 533 to base 26. What algorithm is best for doing this? 回答1: You need to assign a "digit" to each letter, like: A = 0 N = 13 B = 1 O = 14 C = 2 P = 15 D = 3

问题 I'm working on a program that converts between number bases. For example Octal is 8, decimal is 10. Letters A to Z could be considered as base 26. I want to convert a number like "A" into 0, Z into 25, "AA" into 27 and "BA" into 53. Before I start coding I'm doing it on paper so I understand the process. To start out I'm trying to convert 533 to base 26. What algorithm is best for doing this? 回答1: You need to assign a "digit" to each letter, like: A = 0 N = 13 B = 1 O = 14 C = 2 P = 15 D = 3

问题 I am trying to execute following code: import java.math.*; public class HelloWorld{ public static void main(String []args){ System.out.println(BigDecimal.valueOf(Double.NaN)); } } And reasonably, I am getting: Exception in thread "main" java.lang.NumberFormatException at java.math.BigDecimal.<init>(BigDecimal.java:470) at java.math.BigDecimal.<init>(BigDecimal.java:739) at java.math.BigDecimal.valueOf(BigDecimal.java:1069) at HelloWorld.main(HelloWorld.java:6) Is there a way to represent

问题 I am trying to execute following code: import java.math.*; public class HelloWorld{ public static void main(String []args){ System.out.println(BigDecimal.valueOf(Double.NaN)); } } And reasonably, I am getting: Exception in thread "main" java.lang.NumberFormatException at java.math.BigDecimal.<init>(BigDecimal.java:470) at java.math.BigDecimal.<init>(BigDecimal.java:739) at java.math.BigDecimal.valueOf(BigDecimal.java:1069) at HelloWorld.main(HelloWorld.java:6) Is there a way to represent

问题 Basically I need help in generating even numbers from a list that I have created in Python: [1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, ...] I have tried a couple different methods, but every time I print, there are odd numbers mixed in with the evens! I know how to generate even/odd numbers if I were to do a range of 0-100, however, getting only the even numbers from the previous mentioned list has me stumped! P.S. I've

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . How to get all dates for particular weekdays in certain year for example: Monday : 07.01.2015,14.01.2015,...,21.02.2015, ,28.12.2015 Tuesday : 08.01.2015, 15.01.2015,..., 22.02.2015, 29.12.2015 etc ... thanks 回答1: public static IEnumerable<int> DaysInMonth(int year, int month,