each | 易学教程

Prometheus监控神技--自动发现配置

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一、自动发现类型在上一篇文中留了一个坑：监控某个statefulset服务的时候，我在service文件中定义了个EP，然后把pod的ip写死在配置文件中，这样，当pod重启后，IP地址变化，就监控不到数据了，这肯定是不合理的。如果在我们的 Kubernetes 集群中有了很多的 Service/Pod，那么我们都需要一个一个的去建立一个对应的 ServiceMonitor 对象来进行监控吗？这样岂不是也很麻烦么？为解决上面的问题，Prometheus Operator 为我们提供了一个额外的抓取配置的来解决这个问题，我们可以通过额外的配置来获取k8s的资源监控（pod、service、node等）。 promethues支持多种文件发现。其中通过 kubernetes_sd_configs，可以达到我们想要的目的，监控其各种资源。kubernetes SD 配置允许从kubernetes REST API接受搜集指标，且总是和集群保持同步状态，以下任何一种role类型都能够配置来发现我们想要的对象，来自官网翻译的。 1、Node Node role发现每个集群中的目标是通过默认的kubelet的HTTP端口。目标地址默认是kubernetes如下地址中node的第一个地址（ NodeInternalIP , NodeExternalIP ,

jQuery 源码解析(六) $.each和$.map的区别

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$.each主要是用来遍历数组或对象的，例如: var arr=[11,12,13,14]; $.each(arr,function(element,index){ //遍历arr数组 console.log(element,index) //打印element和index }) 输出如下: 而$.map虽然也是遍历数组的，但是它可以生成的数组，只要在函数内返回一个值即可，如下: var arr = [11,12,13,14]; var b = $.map(arr,function(element,index){ //遍历arr数组 if(element%2==0) return element //只返回能被2整除的数字 writer by:大沙漠 QQ:22969969 }) console.log(b) writer by:大沙漠 QQ:22969969 输出: 总结: $.each是用来遍历数组的，$.map除了遍历数组，还可以过滤并生成一个新的数组,当然，不一定非要过滤，任何逻辑都可以在map里的函数内完成，只要将满足要求的值返回即可来源： https://www.cnblogs.com/greatdesert/p/11429021.html

UPC9630 Mad Veterinarian

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问题 G: Mad Veterinarian 时间限制: 1 Sec 内存限制: 128 MB Special Judge 提交: 23 解决: 8 [ 提交 ] [ 状态 ] [命题人: admin ] 题目描述 Mad Veterinarian puzzles have a mad veterinarian, who has developed several machines that can transform an animal into one or more animals and back again. The puzzle is then to determine if it is possible to change one collection of animals into another by applying the machines in some order (forward or reverse). For example: Machine A turns one ant into one beaver. Machine B turns one beaver into one ant, one beaver and one cougar. Machine C turns one cougar into one ant and one beaver.

Python程序员必备——Numpy 100题（附答案）

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参加 2019 Python开发者日，请扫码咨询 ↑↑↑ 作者 | Nicolas P. Rougier 来源 | GitHub 整理 | suiling 知识是宝库，但开启这个宝库的钥匙是实践。——英.托·富勒 NumPy（Numerical Python）是 Python 语言的一个扩展程序库。支持大量的数组与矩阵运算，还提供了大量的数学函数库，是使用 Python 进行科学计算的基础包。 NumPy 经常还与 SciPy（Scientific Python）和 Matplotlib（绘图库）一起使用，都是要掌握的必备技能。今天就先从 NumPy 学起。对于程序员来说，一个很好的学习方法就是一边学习一边实践，本文收集了100道Numpy试题，来自于Stack Overflow和Numpy文档，如果你想学或者正在学习Numpy，本文可以为你提供一个很好的查漏补缺的机会，亲自写代码实践一下自己对Numpy掌握的程度。 1.Import the numpy package under the name np (★☆☆) import numpy as np 2.Print the numpy version and the configuration (★☆☆) print ( np .__version__ ) np .show_config () 3.Create a null

jQuery: Finding duplicate ID's and removing all but the first

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$('[id]').each(function () { var ids = $('[id="' + this.id + '"]'); // remove duplicate IDs if (ids.length > 1 && ids[0] == this) $('#' + this.id).remove(); }); The above will remove the first duplicate ID, however I want to remove the last. I've tried $('#'+ this.id + ':last') but to no avail. Fiddle In the fiddle the input with the value 'sample' should be kept when the append action takes place. Use jquery filter :gt(0) to exclude first element. $('[id]').each(function () { $('[id="' + this.id + '"]:gt(0)').remove(); }); Or select all the available elements, then exclude the first element

JQuery $.each() JSON array object iteration

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I am having some real difficulty attempting to solve a JQuery $.each() iteration This is my array, limiting results for convenience [{"GROUP_ID":"143", "GROUP_TYPE":"2011 Season", "EVENTS":[ {"EVENT_ID":"374","SHORT_DESC":"Wake Forest"}, {"EVENT_ID":"376","SHORT_DESC":"Yale"}, {"EVENT_ID":"377","SHORT_DESC":"Michigan State"}] }, {"GROUP_ID":"142", "GROUP_TYPE":"2010 Season", "EVENTS":[ {"EVENT_ID":"370","SHORT_DESC":"Duke"}, {"EVENT_ID":"371","SHORT_DESC":"Northwestern"}, {"EVENT_ID":"372","SHORT_DESC":"Brown"}] }] My first $.each iteration works very well, but the sub iteration for "EVENTS"

jQuery 源码分析(四) each函数 $.each和$.fn.each方法详解

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$.each一般用来遍历一个数组或对象，$.fn.each()就是指jQuery实例可以执行的操作(因为$.fn是jQuery对象的原型) $.each用来遍历一个数组或对象，并依次执行回掉函数，最后返回传递的数组或对象，以支持链式操作，可以传递三个参数，如下: 　　object　　　待遍历的对象或数组　　callback　　要执行的函数，该函数可以带两个参数,分别表示该元素的索引(如果遍历对象则为键名)和值 writer by:大沙漠 QQ:22969969 　　args　　　一个数组，如果设置了该值，则参数2对应的函数里的参数就是该值，一般可以忽略 $.fn.each就是调用调用$.each来实现的，它传入的参数1就是当前对象this 例如: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script src="http://libs.baidu.com/jquery/1.7.1/jquery.min.js"></script> </head> <body> <p>1</p> <p>2</p> <script> var A = [11,12,13,14,15] $.each(A,function(index,elem){console.log

Tell the end of a .each loop in ruby

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If i have a loop such as users.each do |u| #some code end Where users is a hash of multiple users. What's the easiest conditional logic to see if you are on the last user in the users hash and only want to execute specific code for that last user so something like users.each do |u| #code for everyone #conditional code for last user #code for the last user end end users.each_with_index do |u, index| # some code if index == users.size - 1 # code for the last user end end If it's an either/or situation, where you're applying some code to all but the last user and then some unique code to only the

jQuery looping .each() JSON key/value not working

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I am having problems in looping the key/value of JSON by jQuery .each() function Initially I have a JSON like this: json = {"aaa":[ {"id":"1","data":"aaa1data"} ,{"id":"2","data":"aaa2data"} ], "bbb":[ {"id":"3","data":"bbb1data"} ] } And I would like to loop through all the key/value elements inside the JSON (aaa and bbb) and the retrieve the inner JSON arrays for looping again, so I tried $(json).each(function(index,data) { var zzz = data; $(zzz).each(function(index,data)) { //some other stuff } } However, I discovered that the first .each() function will regard the whole json as a single

jQuery '.each' and attaching '.click' event

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I am not a programer but I enjoy building prototypes. All of my experience comes from actionScript2. Here is my question. To simplify my code I would like to figure out how to attach '.click' events to div's that are already existing in the HTML body. <body> <div id="dog-selected">dog</div> <div id="cat-selected">cat</div> <div id="mouse-selected">mouse</div> <div class="dog"><img></div> <div class="cat"><img></div> <div class="mouse"><img></div> </body> My (failed) strategy was: 1) make an array of objects: var props = { "dog": "false", "cat": "true", "mouse": "false" }; 2) iterate through

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