key-value

PHP - Make an associative array unique, key -> value and value -> key

由 放肆的年华 提交于 2019-12-10 17:39:27
问题 I have a little problem in php, which i find hard to explain in words. I have an associative array which contains key-value. I would like to make a function (or if there is already one) which would take an array as input and remove the duplicates but both ways. For example: In my array I have {a -> b} {a -> c} {b -> a} {b -> c} ... From this view it does not seem like there is any duplicate, but to me {a -> b} and {b -> a} are duplicate. So I would like the function to see it as a duplicate

Hadoop: Array of primitives as value in a key value pair

由 丶灬走出姿态 提交于 2019-12-10 17:01:44
问题 I have asked a very resemblant question in a previous thread Hadoop: How can i have an array of doubles as a value in a key-value pair? . My problem is that i want to pass a double array as value from map to reduce phase. The answer i got was to serialize, convert to Text, pass it to the reducer and deserialize. This is a fine solution but its like serializing and deserializing it twice. ArrayWritable only accepts types that implement Writable like FloatWritable for example. So another

How to set http body request efficiently?

由 心已入冬 提交于 2019-12-10 10:56:45
问题 in my app, I'm currently sending http requests from each viewcontroller. However, currently I'm implementing one class, that is supposed to have method for sending requests. My requests vary in number of parameters. For example, to get list of things for tableview I need to put category, subcategory, filter and 5 more parameters into request. This is what my request looks like now: NSMutableURLRequest *request = [[NSMutableURLRequest alloc]init]; [request setValue:verifString

GPT - Non key value ads showing in key valuse ad slots

由 ☆樱花仙子☆ 提交于 2019-12-10 10:30:03
问题 I have set up Ad Units and Key Values in DFP. I have built the site with the following code based on Google's tutorials: <html lang="en"> <head> <script type="text/javascript"> var googletag = googletag || {}; googletag.cmd = googletag.cmd || []; (function() { var gads = document.createElement("script"); gads.async = true; gads.type = "text/javascript"; var useSSL = "https:" == document.location.protocol; gads.src = (useSSL ? "https:" : "http:") + "//www.googletagservices.com/tag/js/gpt.js";

Flatten an array of objects containing key\values

由 孤街浪徒 提交于 2019-12-10 10:17:53
问题 Say I have the follow array of objects storing a single key\value pair: var someArray = [ {foo: 1}, {bar: 2} ]; I would like to flatten this array into a single object, where each key from the original objects become a property of the new single object like so: someObject = { foo: 1, bar: 2 } I will always have unique keys, and only ever one key\value pairing. I know if I loop over the array in a foreach, then I can only access the index and value of the item, e.g. 0: {foo: 1} I want to be

Run a series of forumulae against key/value pairs stored in a java.util.List

由 醉酒当歌 提交于 2019-12-10 09:33:00
问题 Say I have a List containing components like the following: [ { "id": 1, "name": "Displacement", "value": 200 }, { "id": 2, "name":"Time", "value": 120 }, { "id":3, "name":"Mass", "value": 233 }, { "id":4, "name": "Acceleration", "value": 9.81 }, { "id": 5, "name":"Speed of Light", "value": 300000000 } ] Each component is an object of the following class: class Component { Integer id; String name; Long value; // necessary getters and setters } I need to get the following metrics from the

Is there any character limitation in Dictionary Keys?

由 血红的双手。 提交于 2019-12-10 09:28:05
问题 In .NET can I use any string as a dictionary key? This is part of a templating engine and I'm planning allow users to add their custom headers and values. Headers will be something like "Value of X" or "Summary of Analyse & XYZ Reports", I'm worried if they would get an exception in a rare character or something like that. I assume there size limit but expecting it to be larger than 256 characters. MSDN hasn't got any details on the subject. 回答1: Yes, it can use any valid string (which is

Does Each Element of a multimap Contain Both the Key and Value?

由 ￡可爱￡侵袭症＋ 提交于 2019-12-10 03:49:03
问题 I can't imagine this hasn't been asked, but I'm not having any luck finding it. Does each element of a multimap contain its value and its key? That is does the internal structure of a multimap look like more like this: map<key, vector<value>> Or more like this: vector<pair<key, value>> 回答1: Each element contains both its key and value. You can tell because iteration returns a stable non-allocating reference to std::pair<Key const, Value> . What more, Keys can compare equal but be different. A

使用NewLisp设计Key-Value数据库系统

由 岁酱吖の 提交于 2019-12-09 16:16:28
Lisp是一个很好的语言，最强大的就是其S-表达式，可以说是Lisp能活到今天的唯一一个原因。其次就是函数为基本类型和后来的闭包。当然Lisp也有很大的缺点，即： 一般的设计师难以避免Lisp的缺点。 Lisp有很多方言，很多子系列，可以说百花齐放，也可以说是散沙一盘。这就是Lisp的优点之一，同时也是其缺点之一，但是这些缺点主要是用Lisp的人造成的，而之所以会这样，是因为Lisp太容易滥用了(其缺点正是因为其优点导致的)。 NewLisp是一个非常强大的Lisp实现，也可以称为一个方言，是一个非常简单而又能力十足的方言。你可以用来编写各种脚本、可以用来制作小工具，可以用来设计桌面应用，可以用来设计本地软件、甚至还能胜任大型软件(只要你想，就可以做到)。为什么呢，因为其不但有着十足的灵活性，而且还能极其容易的和其他语言合作，比如你用C语言写底层库，就能在NewLisp中轻易的使用。当然NewLisp有一个致命的缺点： 没有完善的错误信息，一旦出现错误，就如同C++模板一样让你神经失常。 关于这一点，需要NewLisp以后改善，或者是有一个IDE之类的工具提供支持。这是NewLisp不适合设计商业软件的致命原因，再加上本来Lisp就是没多少人用的语言，而且还这么多方言分支，所以目前应该是只适合个人开发了。 项目地址: https://git.oschina.net/nneolc

get Key by value, dict, python

由 随声附和 提交于 2019-12-09 05:42:37
问题 How can I get a key from a value? my dict: countries = { "Normal UK project" : "1", "UK Omnibus project" : "1-Omni", "Nordic project" : ["11","12","13","14"], "German project" : "21", "French project" : "31" } my semi functioning code: for k, v in countries.items(): if "1" in v: print k expected output: Normal UK project actual output: French project UK Omnibus project German project Normal UK project How can I fix my code? 回答1: The problem is that the types of the values in the dictionary
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