treemap

How do you find second highest number in an integer array? [duplicate]

一世执手 提交于 2019-12-11 02:28:13
问题 This question already has answers here : Finding the second highest number in array (39 answers) Closed 5 years ago . How do you find second highest number in an integer array? Is this a good implementation? Is there a better way to do this? public class Find2ndHighest { public static void main(String[] args) { int b[] = {2,3,1,0,5}; TreeMap<Integer,Integer> tree = new TreeMap<Integer,Integer>(); for(int i = 0; i<b.length;i++){ tree.put(b[i], 0); } System.out.println(tree.floorKey(tree

What causes the ClassCastException: java.util.TreeSet cannot be cast to java.lang.Comparable?

北战南征 提交于 2019-12-11 01:59:09
问题 So I'm trying to move all Strings of a certain length from a Collection of Strings (could either be a Set or a List) to a TreeMap and setting a Set of the characters in each String as the key for that String but the line map.put(keyRinger(word), word); throws java.lang.ClassCastException: java.util.TreeSet cannot be cast to java.lang.Comparable Map<Set<Character>, String> map = new TreeMap<Set<Character>, String>(); for (String words : words) { if (word.length() == length) { map.put(keyRinger

Is this null pointer exception in TreeMap due to concurrent access?

眉间皱痕 提交于 2019-12-10 23:33:59
问题 I know that TreeMap is not thread safe. I am trying to do a comparison of TreeMap with ConcurrentSkipListMap. Code I use is shown below and I want to make sure if the error I am getting is due TreeMap not being threadsafe and not because of some other. Exception in thread "pool-1-thread-52" java.lang.NullPointerException at java.util.TreeMap.rotateLeft(TreeMap.java:2060) at java.util.TreeMap.fixAfterInsertion(TreeMap.java:2127) at java.util.TreeMap.put(TreeMap.java:574) at ThreadTestTreeMap$1

Google Guava TreeMultimap — retrieve values based on sorted ordering?

吃可爱长大的小学妹 提交于 2019-12-10 22:15:28
问题 I'm trying to implement something that requires sorting of values of a <Destination -> Quantity> map, such as: <San Francisco -> 10, Seattle -> 20, LA -> 10} The values are not necessarily distinct. I want to be able to retrieve the key/value pair with the largest and smallest value, similar to what a TreeMap is able to do with keys. I found Google Guava's TreeMultimap, which is an implementation of Multimap whose keys and values are ordered by their natural ordering or by supplied

.NET Core开发的iNeuOS工业互联网平台,发布 iNeuDA 数据分析展示组件,快捷开发图形报表和数据大屏

谁说我不能喝 提交于 2019-12-10 21:52:20
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SortedBiTreeMultimap data structure in Java?

廉价感情. 提交于 2019-12-10 19:32:37
问题 Is there any Java library with TreeMap-like data structure which also supports all of these: lookup by value (like Guava's BiMap) possibility of non-unique keys as well as non unique values (like Guava's Multimap) keeps track of sorted values as well as sorted keys If it exists, it would probaby be called SortedBiTreeMultimap, or similar :) This can be produced using a few data structures together, but I never took time to unite them in one nice class, so I was wondering if someone else has

【更新】Essential Studio for JavaScript 2018 v4发布

旧巷老猫 提交于 2019-12-10 16:47:01
下载Essential Studio for JavaScript最新版本 Essential Studio for JavaScript 是首款专门用于LOB应用开发的JavaScript框架。包含40多种独特的、全新设计的控件,包括网格、图表、计量器、编辑器、树形视图、菜单、OLAP网格等等。 Common 新组件 以下组件已经添加到Essential JS 2 。 Chip Chip控件包含一小块在单击操作时触发事件的基本信息。它还包含主要文本、图像或两者,并且主要用于邮件、联系人或筛选器标记。 输入芯片——基本芯片与删除图标,代表一个人或实体,并能够从芯片列表收集移除芯片。 选择芯片——用于从可用的芯片中选择一个选项。 过滤芯片——用于从可用的选项中选择多个选项。 In-place Editor In-place Editor控件用于编辑具有内联和弹出模式的适当元素。该控件具有内置的支持来处理所有表单控件,如文本框、下拉列表、日期选择器和富文本编辑器。 PDF阅读器 PDF查看器组件使您可以查看和打印PDF文件: 可以打开和显示用AES和RC4加密保护的正常和PDF文件。 包括核心交互:滚动、缩放、平移和页面导航。 内置工具栏。 可以从PDF文件中选择和复制文本。 可以在整个PDF文档中容易地搜索文本。 借助于书签、缩略图、超链接和内容表,可以轻松导航。

【更新】Essential Studio for ASP.NET Core 2018 v2发布

余生颓废 提交于 2019-12-10 16:46:50
下载Essential Studio for ASP.NET Core最新版本 Essential Studio for ASP.NET Core是一款创建在Windows,Linux和Mac上运行的Web应用程序的界面控件。 Common 新组件 以下组件已经添加到Essential JS 2 for ASP.NET MVC。 Chip Chip控件包含一小块在单击操作时触发事件的基本信息。它还包含主要文本、图像或两者,并且主要用于邮件、联系人或筛选器标记。 输入芯片——基本芯片与删除图标,代表一个人或实体,并能够从芯片列表收集移除芯片。 选择芯片——用于从可用的芯片中选择一个选项。 过滤芯片——用于从可用的选项中选择多个选项。 In-place Editor In-place Editor控件用于编辑具有内联和弹出模式的适当元素。该控件具有内置的支持来处理所有表单控件,如文本框、下拉列表、日期选择器和富文本编辑器。 PDF阅读器 PDF查看器组件使您可以查看和打印PDF文件: 可以打开和显示用AES和RC4加密保护的正常和PDF文件。 包括核心交互:滚动、缩放、平移和页面导航。 内置工具栏。 可以从PDF文件中选择和复制文本。 可以在整个PDF文档中容易地搜索文本。 借助于书签、缩略图、超链接和内容表,可以轻松导航。 包括适合页面和适合宽度两种视图模式。

How to get last n elements of a Treemap

…衆ロ難τιáo~ 提交于 2019-12-10 14:21:13
问题 I have a TreeMap, that looks like this: TreeMap<Instant, HashMap<Type, Double>> The Instant values are representing hours of a day; for each passed hour a value is stored in my map. Now I would like to get the last 24 elements (so the hours of the passed day) of this map. How could I do that? Cheers 回答1: You can use the descendingMap call to get a view on the map which is basically in the reverse order, then take the first 24 entries from that (call iterator etc). (Guava's Iterables provides

How do you adjust/control the scale in a treemap (using the 'portfolio' library) in R?

元气小坏坏 提交于 2019-12-10 14:11:07
问题 I am using R and the 'portfolio' library to build a treemap. The scale is defaulting to '-1000 to 1000'. I need it to be '0 to 1000', for example. I know there is a 'scale' parameter to map.market(), but I can't figure out what to pass to it. 回答1: A symmetric colour-mapping around zero is hard coded into map.market : legend.ncols <- 51 l.x <- (0:(legend.ncols - 1))/(legend.ncols) l.y <- unit(0.25, "npc") l.cols <- color.ramp.rgb(seq(-1, 1, by = 2/(legend.ncols - 1))) if (is.null(scale)) { l