I am iterating over a collection of data, in my case, an array of objects. Here is a sample of 2 data points from it:
{
violation_id: '211315',
inspection_id: '268804',
violation_category: 'Garbage and Refuse',
violation_date: '2012-03-22 0:00',
violation_date_closed: '',
violation_type: 'Refuse Accumulation' },
{
violation_id: '214351',
inspection_id: '273183',
violation_category: 'Building Conditions',
violation_date: '2012-05-01 0:00',
violation_date_closed: '2012-04-17 0:00',
violation_type: 'Mold or Mildew' }
I need to create a new array of objects from this, one for each "violation_category" property. If Violation category already exists in the new array I am creating, i simply add the information to that existing category object (instead of having two "building conditions" objects for example, I would just add to an existing one).
However, I am having trouble assigning to the existing object if the current one exists (it's easy to check if it does not, but not the other way around). This is what am attempting to do currently:
if (violationCategory.uniqueCategoryName) {
violationCategory.uniqueCategoryName.violations = results[i].violation_id;
violationCategory.uniqueCategoryName.date = results[i].violation_date;
violationCategory.uniqueCategoryName.closed =
results[i].violation_date_closed;
} else {
category.violations = results[i].violation_id;
category.date = results[i].violation_date;
category.closed = results[i].violation_date_closed;
violationCategory.push(category);
}
In first condition, if this category (key) exists, I simply add to it, and in the second condition, this is where I am struggling. Any help appreciated. Thanks guys.
Just add an empty object to the key if there no object there :
violationCategory.uniqueCategoryName = violationCategory.uniqueCategoryName || {};
And only then, add the data you want to the object.
violationCategory.uniqueCategoryName.violations = results[i].violation_id;
violationCategory.uniqueCategoryName.date = results[i].violation_date;
violationCategory.uniqueCategoryName.closed =
results[i].violation_date_closed;
No condition needed.
Good luck!
Assuming that you have an input variable which is an array of objects, where the objects are looking like the objects of the question, you can generate your output like this:
var output = {};
for (var item of input) {
if (!output[item.violation_category]) output[item.violation_category] = [];
output[item.violation_category].push(item);
}
Of course you might customize it like you want.
Related
How I could append an element to an array like that ?.
Adding an item to an array structure like that, requires three steps:
Read the existing data.
Determine the key of the new item.
Write the new item.
In code that'd be something like:
const ref = admin.database().ref("javascript");
ref.once("value").then((snapshot) => {
let numChildren = parseInt(snapshot.numChildren());
ref.child(""+(numChildren+1)).set(4);
});
Note that this type of data structure is fairly non-idiomatic when it comes to Firebase, and I recommend reading:
Best Practices: Arrays in Firebase.
I am trying to copy data from one list to other list (both lists are on different sites) along with lookup columns. But, I am getting an error for lookup field as:
Value does not fall within the expected range
Code works and data gets copied for other non-lookup fields. I tried every possible way including increasing List View Lookup Threshold and all possible ways of code but still error persists at ExecuteQuery().
Below is my code for lookup field:
if (field is FieldLookup && field.InternalName == "Country")
{
var CountryLookup = (item.FieldValues["Country"] as FieldLookupValue).LookupValue.ToString();
var CountryLookupId = (item.FieldValues["Country"] as FieldLookupValue).LookupId.ToString();
FieldLookupValue flvRDS = new FieldLookupValue();
flvRDS.LookupId = int.Parse(CountryLookupId);
itemToCreate["Country"] = flvRDS;
itemToCreate.Update();
destContext.ExecuteQuery();
}
Help is really appreciated.
I assume item is the new ListItem you're trying to create on your target list.
But you're never in fact reading any value from field here! So basically, you're trying to set your new FieldLookup.LookupId with the item["Country"].LookupId, which should logically be empty at this moment.
Here's a method I use to retrieve a lookup field ListItem from a value, feel free to modify it to fit your need, since I don't know how you want to retrieve it (SPList is an alias for Microsoft.SharePoint.Client.List).
private ListItem GetLookupItem(FieldLookup lookupField, string lookupValue)
{
string mappingField = lookupField.LookupField;
Microsoft.SharePoint.Client.List lookupList = Context.Web.Lists.GetById(new Guid(lookupField.LookupList));
Context.Load(lookupList);
Context.ExecuteQuery();
ListItemCollection libListItems = lookupList.GetItems(CamlQuery.CreateAllItemsQuery());
Context.Load(libListItems, items => items.Include(
itemlookup => itemlookup.Id,
itemlookup => itemlookup[mappingField]));
Context.ExecuteQuery();
foreach (ListItem mappedItem in libListItems)
{
object mappedField = mappedItem[mappingField];
if (mappedField != null && mappedField.ToString().Equals(lookupValue))
return mappedItem;
}
return null;
}
Now that you have the corresponding ListItem, you can set your item.LookupId with its Id:
if (field is FieldLookup && field.InternalName == "Country")
{
FieldLookupValue flvRDS = new FieldLookupValue();
flvRDS.LookupId = GetLookupItem(field as FieldLookup, "France").Id; // here, dunno how you get your country's name
itemToCreate["Country"] = flvRDS;
itemToCreate.Update();
destContext.ExecuteQuery();
}
Feel free to add some more previous code if you want an answer more suited for your specific issue.
Is it possible to select a single object from a group created like this?
var r = new fabric.Rect(...);
var l = new fabric.Line(...);
var roadGroup = new fabric.Group([r,l],{ ... });
So I want to have a group, but select objects l or r separately.
The simple answer is yes, but you should make sure you take into account the purpose of a group.
To get a handle on an object that is wrapped in a group you can do something like this:
var r = roadGroup._objects[0];
var l = roadGroup._objects[1];
To select a child of a group try something like this:
fabricCanvas.setActiveObject(roadGroup._objects[0]);
soapbox:
The purpose of creating a group is to treat several objects as if they were a single one. The purpose of selecting an object is to allow user interactions with an object. If you want your user to interact with a portion of a group, you might want to consider not grouping them in the first place, or else un-grouping them prior to selecting the child object.
/soapbox
I believe _objects is to be used internally only and may thus change in the future.
To me it group.item(indexOfItem) seems to be the way
So I had this scenario where I have multiple images in a box. Those all images move along with the box (as a group) but user should also be able to select an individual image and move it.
Basically I wanted to select individual objects (in my case images) of group, I did it like this:
groupImages.forEach(image => image.on('mousedown', function (e) {
var group = e.target;
if (group && group._objects) {
var thisImage = group._objects.indexOf(image);
var item = group._objects[thisImage];//.find(image);
canvas.setActiveObject(item);
}
}));
groupImages could be list of objects which you want to select individually.
I seem to be having a problem with assigning values to fields of a content item with a custom content part and the values not persisting.
I have to create the content item (OrchardServices.ContentManager.Create) first before calling the following code which modifies a field value:
var fields = contentItem.As<MyPart>().Fields;
var imageField = fields.FirstOrDefault(o => o.Name.Equals("Image"));
if (imageField != null)
{
((MediaLibraryPickerField)imageField).Ids = new int[] { imageId };
}
The above code works perfectly when against an item that already exists, but the imageId value is lost if this is done before creating it.
Please note, this is not exclusive to MediaLibraryPickerFields.
I noticed that other people have reported this aswell:
https://orchard.codeplex.com/workitem/18412
Is it simply the case that an item must be created prior to amending it's value field?
This would be a shame, as I'm assigning this fields as part of a large import process and would inhibit performance to create it and then modify the item only to update it again.
As the comments on this issue explain, you do need to call Create. I'm not sure I understand why you think that is an issue however.
I have a list which contains more than 75 thousand object. To search item from list currently I am using following code.
from nd in this.m_ListNodes
where
nd.Label == SearchValue.ToString()
select
nd;
Is this code is efficient?
How often do you need to search the same list? If you're only searching once, you might as well do a straight linear search - although you can make your current code slightly more efficient by calling SearchValue.ToString() once before the query.
If you're going to perform this search on the same list multiple times, you should either build a Lookup or a Dictionary:
var lookup = m_ListNodes.ToLookup(nd => nd.Label);
or
var dictionary = m_ListNodes.ToDictionary(nd => nd.Label);
Use a dictionary if there's exactly one entry per label; use a lookup if there may be multiple matches.
To use these, for a lookup:
var results = lookup[SearchValue.ToString()];
// results will now contain all the matching results
or for a dictionary:
WhateverType result;
if (dictionary.TryGetValue(SearchValue.ToString(), out result))
{
// Result found, stored in the result variable
}
else
{
// No such item
}
No. It would be better if you used a Dictionary or a HashSet with the label as the key. In your case a Dictionary is the better choice:
var dictionary = new Dictionary<string, IList<Item>>();
// somehow fill dictionary
IList<Item> result;
if(!dictionary.TryGetValue(SearchValue.ToString(), out result)
{
// if you need an empty list
// instead of null, if the SearchValue isn't in the dictionary
result = new List<Item>();
}
// result contains all items that have the key SearchValue