ready | 易学教程

oracle Instance status: READY–lsnrctl status|start|stop

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监听器启动，并不一定会认识数据库实例，启动监听器，请判别相关实例是否 READY [oracle@redhat4 ~]$ lsnrctl status LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 06-OCT-2015 19:41:12 Copyright (c) 1991, 2009, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production Start Date 06-OCT-2015 16:24:17 Uptime 0 days 3 hr. 16 min. 55 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network

Js 图片轮播渐隐效果

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1 <!DOCTYPE html> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 5 <title></title> 6 <style type="text/css"> 7 * { 8 margin:0px; 9 padding:0px; 10 } 11 li { 12 list-style: none; 13 } 14 /*example*/ 15 .example { 16 width:600px; 17 height:400px; 18 overflow:hidden; 19 position:relative; 20 margin:50px auto; 21 } 22 .example ol { 23 position: relative; 24 width: 120px; 25 height: 20px; 26 top: -30px; 27 left: 60px; 28 } 29 30 .example ol li { 31 float: left; 32 width: 10px; 33 height: 10px; 34 margin: 5px; 35

条件变量为什么要和互斥量一起使用？

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一个简单的使用条件变量的场景：主线程从stdin读取一个字符串，然后由echo线程打印这个字符串，正确的代码是这样的： # include <iostream> # include <condition_variable> # include <mutex> # include <thread> # include <string> # include <stdio.h> static std :: condition_variable cv ; static std :: mutex m ; static bool ready = false ; static std :: string s ; static void echoWorker ( ) { std :: unique_lock < std :: mutex > lock ( m ) ; while ( ! ready ) { cv . wait ( lock ) ; } std :: cout << "echo string: " << s << std :: endl ; } int main ( ) { const int BUF_LEN = 20 ; std :: thread t ( [ ] ( ) { echoWorker ( ) ; } ) ; char buffer [ BUF_LEN ] ;

jQuery document ready functions

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问题 what are the differences (if any) for the following jQuery document ready functions: $("document").ready(function() {}); and $(function() {}); 回答1: They are equivalent, the later is a shorthand form for the first. From the jQuery documentation: All three of the following syntaxes are equivalent: $(document).ready(handler) $().ready(handler) (this is not recommended) $(handler) 回答2: The only difference is brevity. http://api.jquery.com/jQuery/#jQuery3 jQuery( callback ) This function behaves

Consistent way of finding element height after nested image has loaded

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问题 I have a div.body which contains an img amongst a couple more elements. I need to get the height of div.body after img has been loaded. I'm currently using the following to measure: var $body = $("div.body"); $body.find("img").ready(function(){ var bodyHeight = $body.outerHeight(); }); This returns the correct height 90% of the time, however some times it is returning the height not including the height of the image. For example, if the other elements in div.body sum up to 50px , and my image

jQuery: receive document ready() on child window

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问题 I'm trying to get notified when the child window I'm opening has its document loaded and ready. This doesn't seem to work: win = window.open(href, 'test', 'width=300, height=400'); win.focus(); $(win.document).ready(function() { // Ok, the function will reach here but if I try to manipulate the // DOM it doesn't work unless I use breakpoints $(this).contents().find("...").doStuff(); // nothing happens }); What do I have to do? 回答1: Have you tried this? — $(win.document).ready(function() { $

jquery学习笔记3 jq遍历

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遍历方式：向上（父级元素）向下（子元素）水平（同胞元素）一、向上遍历 parent()　　向上一级放回被选元素的直接父元素 parents() 返回被选元素的所有祖先元素一路向上遍历（父级以及父级的父级等） parentsUntil() 返回被选元素与括号内给定元素之间的所有祖先元素 $(document).ready(function(){ $("span").parentsUntil("div"); }); 　　二、向下遍历 children() 返回被选元素的所有直接子元素 find() 返回被选元素的后代元素一路向下直到最后一个 $(document).ready(function(){ $("div").find("span"); }); 　　 $(document).ready(function(){ $("div").find("*"); }); 　　三、水平遍历 1、siblings() 返回被选元素的所有同胞元素 2、next（）　　　　返回被选元素的下一份同胞元素 3、nextAll（）　　　　返回同胞元素的所有跟随的同胞元素 4、nextUntil()　　　　返回介于两个给定参数（之后）之间的所有的同胞元素 5、prev()　　　　　　返回被选元素的上一个同胞元素 6、prevAll()　　　　　返回被选元素之前的所有同胞元素　　　　

jQuery combine .ready and .resize

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问题 Some (well, nearly all) of my code that is in my jQuery .ready function also applies when the window is resized, as it's layout work. However, since it's the same code, how could I "combine" the two functions, so that my code doesn't repeat itself (and be a mess to maintain)? Thanks! 回答1: $(document).ready(myfunction); $(window).on('resize',myfunction); function myfunction() { // do whatever } Another technique is to .trigger() one event inside the other: $(window).on('resize',function() { //

body中的onload事件和document.ready()有什么区别？

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onload 表示页面包含图片等文件在内的所有元素都加载完成 ready 表示文档结构已经加载完成，不包含图片等非文字媒体文件原文链接 Java 自学经历 Java 面试题 H5 Java 面试题小程序来源： CSDN 作者： ConstXiong 链接： https://blog.csdn.net/meism5/article/details/103692978

Why is my ready function not reached?

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问题 I am trying to reset a cookie's val to "1" every time in the ready function, however it seems as if my ready function is not getting reached at all. First, I got the following code to get and set cookies without using a plugin here. function setCookie(key, value) { var expires = new Date(); expires.setTime(expires.getTime() + 31536000000); //1 year document.cookie = key + '=' + value + ';expires=' + expires.toUTCString(); } function getCookie(key) { var keyValue = document.cookie.match('(^|;)