//排序并获取index的顺序:4,7,2,9-->9,7,4,2-->4,2,1,3 Array.prototype.getIndex=function(){ var orderLength = this.length; var temp,tp; var c=[]; for(var l=0;l<orderLength;l++){ c[l]=l; } for(var u=0;u<orderLength;u++){ for (var v=0;v<orderLength-u-1;…
Let's see how to track index when we use 'ngFor: <li *ngFor="#hero of heros | async, #i = index"> <hero-item [hero]="hero" (changed)="thisHero = $event;" [index]="i"></hero-item> </li> #i = i…
以前用jq 做过图片切换 滑动之类的特效现在想用js 试试是怎么一回事 jq图片切换的思路是用index()函数获取当前点击的按钮的索引然后根据索引值将对应索引的图片显示出来 于是查了一下js 是如何获取index的如下: js代码 var ul = document.getElementById("list"); var ul_child = ul.getElementsByTagName('li'); for (var i = 0; i < ul_child.length;…
ElasticSearch NEST Client 操作Index var indexName="twitter"; var deleteIndexResponse = client.DeleteIndex(indexName); var createIndexResponse = client.CreateIndex(indexName); var getIndexResponse = client.GetIndex(in…
pandas-04 多级index操作 在pandas中可以为series和dataframe设置多个index,也就是说可以有多级index和column.这样可以对pandas的操作更加灵活. import numpy as np import pandas as pd from pandas import Series, DataFrame np.random.seed(666) # series 中的 index s1 = Series(np.random.randn(6), index…