numbers

1. script: $num = "00445790"; echo $num; returns: 00445790 2. script $num = 00445790; echo $num; returns: 2351 Can somebody explain why I get 2351 on the second script? John Conde Integers that start with zero are consider octal. Because octal integers only use numbers from 0 to 8 everything from the 9 on are ignored. So 00445790 becomes 004457 which is 2351 in decimal. 来源： https://stackoverflow.com/questions/30629817/weird-output-when-number-starts-with-0

Let's say I have a table in Oracle 12c with columns: create table t1 ( a number (5,0), b varchar (5,0) d ... e ... ); Then I insert 100,000,000 records in both columns which have the same values - e.g. 20151 and '20152' ... (for a first record) 20152 and '20152' ... (for a second record) 20153 and '20153' ... (for a third record) ... Then I add index 1 on column 'a' and index 2 on column 'b'. Question is - would the query perform equally fast when executing against column 'a' as on column 'b' (e.g. join query with other table based on a column 'a' or based on a column 'b' or WHERE clause on

I am trying to extract all numbers from a string with a function in Excel. In the second time, I would like to extract the maximum value contains in the string. My string look likes : ATCG=12.5,TTA=2.5,TGC=60.28 Desired output: 60.28 In a first time, I am trying to extract all numbers with my function but it stops only on the first figure. Function MyCode(ByVal txt As String) As String With CreateObject("VBScript.RegExp") .Pattern = "\d.+" If .test(txt) Then MyCode = .Execute(txt)(0) End With End Function Your decimal separator may be different from the US decimal separator. Public Function

题目描述 从扑克牌中随机抽 5 张牌，判断是不是一个顺子，即这5张牌是不是连续的。 2～10 为数字本身， A 为 1 ， J 为 11 ， Q 为 12 ， K 为 13 ，大小王可以看做任意数字。 为了方便，大小王均以 0 来表示，并且假设这副牌中大小王均有两张。 样例1 输入：[8,9,10,11,12] 输出：true 样例2 输入：[0,8,9,11,12] 输出：true 解法一 对数组排序； 计算出 0 的个数 zeroCount ； 从第一个不是 0 的数字开始遍历，与后一个数字比较，如果相等，直接返回 false ；否则累计 gap ； 判断 zeroCount 是否大于等于 gap 。 import java.util.Arrays; class Solution { /** * 判断是否是连续的数字 * * @param numbers 数组 * @return 是否是顺子 */ public boolean isContinuous(int [] numbers) { if (numbers == null || numbers.length == 0) { return false; } int zeroCount = 0; Arrays.sort(numbers); for (int e : numbers) { if (e > 0) { break;

I'm looking for integers solution here. I know it has infinitely many solution derived from the first pair solution and gcd(a,b)|c. However, how could we find the first pair of solution? Is there any algorithm to solve this problem? Thanks, Chan Note that there isn't always a solution. In fact, there's only a solution if c is a multiple of gcd(a, b) . That said, you can use the extended euclidean algorithm for this. Here's a C++ function that implements it, assuming c = gcd(a, b) . I prefer to use the recursive algorithm: function extended_gcd(a, b) if a mod b = 0 return {0, 1} else {x, y} :=

JSP 自我学习笔记2 一 .学习目标 主要学习jsp中的jsp:include,jsp:forward,jsp:param 二 .讲解内容 jsp:include动作 jsp:include动作是在主页面被请求时，将次级页面的输出包含进来。尽管被包含的页面的输出中不能含有JSP，但这些页面可以是其他资源所产生的 结果。服务器按照正常的方式对指向被包含资源的URL进行解释，因而这个URL可以是Servlet或JSP页面。服务器以通常的方式运行被包含的页面， 将产生的输出放到主页面中，这种方式与RequestDispatcher类的include方法一致。它的优点是在被包含的页面发生更改时，无须对主页 面做出修改。它的缺点是所包含的是次级页面的输出，而非次级页面的实际代码，所以在被包含的页面中不能使用任何有可能在整体上影响主页面的JSP构造。 语法： <jsp:include page="sample.jsp" flush="true"> <jsp:param name="name" value="value"/> </jsp:include> 其中参数设置可以没有，如果没有参数设置，则必须采用 <jsp:include page="sample.jsp" flush="true"/> jsp:forward动作

For example, say: <?php // Grab the ID from URL, e.g. example.com/?p=123 $post_id = $_GET['p']; ?> How do I check if variable $post_id is a number, and a positive integer at that (i.e. 0-9, not a floating point number, fraction, or a negative number)? EDIT: Can't use is_int 'cause $_GET returns a string. Think I need to use intval() or ctype_digit() , with the latter seeming more appropriate. For example: if( ctype_digit( $post_id ) ) { ... } To check if a string input is a positive integer, i always use the function ctype_digit . This is much easier to understand and faster than a regular