key-value

问题 This question already has answers here : Find object by id in an array of JavaScript objects (32 answers) Loop through an array in JavaScript (41 answers) Closed last year . In an example like this, I'm trying to get inside the array of the 'new folder' to take out the keys from the information array that is nested inside the "new folder' array. let info = [ { fileName: ‘new folder’, size: 233423, information: { created: ‘2014-06-06’, modified: ‘2016-03-04 } }, { fileName: ‘untitled’, size:

问题 I'm trying to make an app in Rails 4. I use simple form for forms. I have an attribute called 'self_governance' in my model. I've written a helper method so that I can define 5 levels which can be stored for this attribute, but which are displayed to the user as options (rather than numbers 1 .. 5). In my helper, I have: module PreferencesHelper def self_gov_selector [ [ 'tier 1','1'], [ 'tier 2','2'], [ 'tier 3','3'], [ 'tier 4','4'], [ 'tier 5','5'], ] end In my form, I then have: <%= f

问题 The code below contains various single-threaded implementations of reduceByKeyXXX methods and a few helper methods to create input sets and measure execution times. (Feel free to run the main -method) The main purpose of reduceByKey (as in Spark) is to reduce key-value-pairs with the same key. Example: scala> val xs = Seq( "a" -> 2, "b" -> 3, "a" -> 5) xs: Seq[(String, Int)] = List((a,2), (b,3), (a,5)) scala> ReduceByKeyComparison.reduceByKey(xs, (x:Int, y:Int) ⇒ x+y ) res8: Seq[(String, Int)

问题 I would like to use redis to query data from commandline, scripts, web and from within spreadsheets. I can find good examples for all but spreadsheets... I don't quite know where to start for access from a MS Excel spreadsheet, though. Google is failing me. Please let me know how you would suggest doing this, thanks! p.s. for those unfamiliar redis is a key-value datastore described here: http://code.google.com/p/redis/ 回答1: I think I found what I want with XLLoop http://xlloop.sourceforge

问题 I'm looking for a way to have a function such as: myFunction({"Key", value}, {"Key2", value}); I'm sure there's something with anonymous types that would be pretty easy, but I'm not seeing it. The only solution I can think of is to have a params KeyValuePair<String, object>[] pairs parameter, but that ends up being something similar to: myFunction(new KeyValuePair<String, object>("Key", value), new KeyValuePair<String, object>("Key2", value)); Which is, admittedly, much uglier. EDIT: To

问题 I have a dictionary and I would like to get some values from it based on some keys. For example, I have a dictionary for users with their first name, last name, username, address, age and so on. Let's say, I only want to get one value (name) - either last name or first name or username but in descending priority like shown below: (1) last name: if key exists, get value and stop checking. If not, move to next key. (2) first name: if key exists, get value and stop checking. If not, move to next

问题 I have an array within my JSON file which looks as follows: { "commands": [ { "user": "Rusty", "user_id": "83738373", "command_name": "TestCommand", "command_reply": "TestReply" } ] } and so on. I want to limit the amount of commands to a certain user (recognized by the user_id ) to 3 commands. I know I need to start by looping through each object but stuck at how to accomplish this part. 回答1: You can do this by using the .reduce() method on the Array prototype. The idea is to go through the

问题 I create a xib. The file owner of the xib is a set to a custom class called PackageTrackingListViewElement . The PackageTrackingListViewElement has an IBOutlet property called contentView , among others. Several views in interface builder are connected to the IBOutlet properties of the custom class called PackageTrackingListViewElement . I try to initialize an object from the xib. PackageTrackingListViewElement *element2 = [[[NSBundle mainBundle] loadNibNamed:@

问题 New to python here. Trying to get find the average of totaled up keys in a dictionary. I've managed to grab the total of all values for each key, but I'm not certain how to find the average of these new values. import os f = open("iris.data", "r") count = 0 d = {} # You want the dictionary to have d = {Iris-setosa: list of values] # Populate dictionary # Code would work regardless of file # Reference movie names file for line in f: if line.isspace(): continue #If a particular line is made of

问题 This question already has answers here : Converting Object to JSON and JSON to Object in PHP, (library like Gson for Java) (4 answers) How do I extract data from JSON with PHP? (7 answers) Closed last year . I have data as a string, for example: $a = '{"ip":"111.11.1.1","country":"abc","country_code":"xy","city":"xxx"}'; How to convert it into "key=>value" (associative) array like this : ip => 111.11.1.1 country => abc country_code => xy city => xxx 回答1: You can use json-decode and then cast