linq.js | 易学教程

Removing element from object array with linq.js

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问题 I have started using linq.js a while ago, and found it very useful, but there's an issue I really can't solve somehow. I'm using angular, and I have a simple json array with the following structure: [ { id: 1, name: 'John', age: 20}, { id: 2, name: 'Josh', age: 34}, { id: 3, name: 'Peter', age: 32}, { id: 4, name: 'Anthony', age: 27}, ] I'm looking for the best (or at least a working) example wich could help me understanding how to remove an element of this array by the id property. I have

How can i make a linq

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问题 var adreees = Variables.PolicyCustomerAddresses; var linq= Enumerable.From(adreees) .Where(linq.CUSTOMER_ADRESS_ID === correspondenceAdress && linq.CUSTOMER_ID === customerCode) .DefaultIfEmpty(null) .First(); adreees is an array and it is include 3 index and I want to get CUSTOMER_ADRESS_ID === correspondenceAdress && linq.CUSTOMER_ID === customerCode index's values. 回答1: You need to use $ as placeholder for the actual array and you need to write the condition as a string. var adreees = [{

Creat array of JSON objects from mulitple objects using linq.js

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问题 I have a JSON array like so: var jsonArray = [ { Date: "2010-02-25", Size:"Large", Type:"a", Value: "100"}, { Date: "2010-02-25", Size:"Medium", Type:"a", Value: "160"}, { Date: "2010-02-25", Size:"Small", Type:"a", Value: "200"}, { Date: "2010-02-25", Size:"Large", Type:"b", Value: "400"}, { Date: "2010-02-25", Size:"Medium", Type:"b", Value: "120"}, { Date: "2010-02-25", Size:"Small", Type:"b", Value: "170"} ] I have been using linq.js and I am trying to manipulate the above JSON so the 6

javascript linq.js groupby

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问题 I have the following JSON data in a Javascript function (it's simplified here): var data = [ { Expiry: "2013-01-02T00:00:00", EndDate: "2013-01-16T00:00:00", Category: 10, Amount: 14.53 }, { Expiry: "2013-01-02T00:00:00", EndDate: "2013-01-16T00:00:00", Category: 25, Amount: 14.86 }, { Expiry: "2013-02-06T00:00:00", EndDate: "2013-02-20T00:00:00", Category: 10, Amount: 14.43 }, { Expiry: "2013-02-06T00:00:00", EndDate: "2013-02-20T00:00:00", Category: 25, Amount: 14.76 } ]; Note: An EndDate

Inner join with linqJS

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问题 I create a dateRange wich is an array of dates. Then I have an array of day numbers like 0 for Sunday, 1 for Monday etc... Now I want to get all dateRange dates according to the visibleWeekDays array. The solution is in the getVisibleDateRange function. But I want to do it with LINQ because why reinvent the wheel... The inner or outer selector would still need a .day() because one of the selector is a momentJS object. But to get the day of week I would need to put the ".day()" into the linqJS

linq.js: GroupBy(), then ToJSON()

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问题 I'm new to linq.js. I'd like to do a GroupBy() , which is then converted to JSON. However, I'm getting back a string array. var data = [ { "Gender":"M" }, { "Gender":"M" }, { "Gender":"F" } ]; var grouped_dt = Enumerable.From(data).GroupBy("$.Gender", "", 'key,e=>key+":"+e.Count()', "").ToJSON(); My result then looks something like this: [ "M:2", "F:1" ] , which hardly looks like JSON (furthermore it is a string ; I can alert() it immediately). Does anybody have any idea where in my syntax am

how to bind data from dynamically named inputs inside a ng-repeat

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问题 my goal is to be able to copy data from a table row to another table row. if the data from 2015 has not changed from 2016 the user needs a quick way of copying the values into the 2016 input fields. the models are dynamically created for these forms. the data you see in this image is assigned to a section. the input models are name 'price_min + section_id', price_max + section_id' , etc... the history model does not have the section_id added to the end of the model names. so there needs to be

linqjs group by with a sum

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This might seems like an easy question but I'm struggling with the linqjs syntax. Given the following basic JSON: { "DateEvent": "2013-04-23 14:00:00Z", "DateRecord": "2013-04-23 14:00:00Z", "Amount": -9500, "Type": { "Description": "Capital" }, "Currency": { "ID": "USD", } } Using linqjs how can I return the total for each currency? Enumerable.From(data) .GroupBy("{ currency: $.Currency.ID }", null, function (key, g) { var result = { currency: key.currency, total: g.Sum($.Amount) }}); The code above doesn't work. You almost had it. Your key selector in your GroupBy and Sum is incorrect. Also

linqjs group by with a sum

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问题 This might seems like an easy question but I'm struggling with the linqjs syntax. Given the following basic JSON: { "DateEvent": "2013-04-23 14:00:00Z", "DateRecord": "2013-04-23 14:00:00Z", "Amount": -9500, "Type": { "Description": "Capital" }, "Currency": { "ID": "USD", } } Using linqjs how can I return the total for each currency? Enumerable.From(data) .GroupBy("{ currency: $.Currency.ID }", null, function (key, g) { var result = { currency: key.currency, total: g.Sum($.Amount) }}); The