Good morning to all and thank you for your help.
I'm working in a map page (map.html) create by leaflet library that take data from a external geojson file called water_well.js. This file, previously generated by overpass service is just a list of markers. every Marker have some proprerties. Follow an exemple:
"properties": {
"operator:type": "international",
"is_in:district": "west_mamprusi",
"is_in:region": "northern",
"source:date": "2012-02-11",
"source:ele": "gps",
"water_wells:source_type": "borehole"
},
The main page extract those data from the file before with this javascript:
var wwMarker = L.geoJson(water_well, {
pointToLayer : function (feature, latlng) {
lat = feature.geometry.coordinates[0];
lng = feature.geometry.coordinates[1];
//following code that make error
op_type = feature.properties.operator_type;
district = feature.properties.is_in:district;
region = feature.properties.is_in:region;
source_date = feature.properties.source:date;
source_ele = feature.properties.source:ele;
source_type = feature.properties.water_wells:source_type;
.....
I'm sure the problem is my Zero javascript knowledge, but I'm not a programmer and I do this map for my NGO engaged in water wells in Burkina Faso.
The script for extraction of the data don't work in this point:
op_type = feature.properties.operator:type;
The problem is ":" because is invalid character.
The second question is that not all markers in the first file called water_well.js have the same "properties" filled ad actually it is possible that someone have different group of "properties like those two:
{
"type": "Feature",
"id": "node/1606958159",
"properties": {
"#id": "node/1606958159",
"amenity": "drinking_water",
"man_made": "water_well",
"name": "puits 4"
},
"geometry": {
"type": "Point",
"coordinates": [
-3.6235696,
12.02171
]
}
},
{
"type": "Feature",
"id": "node/1913126817",
"properties": {
"#id": "node/1913126817",
"ele": "170.8000030517578",
"grid_proximity": "grid_further_500_m",
"is_in:district": "builsa",
"is_in:region": "upper_east",
"man_made": "water_well",
"operational_status": "open",
"operator:type": "individual",
"pipe_connection": "no",
"pump": "manual",
"seasonal": "another_pattern",
"source": "MVP,Columbia University",
"source:date": "2012-02-14",
"source:ele": "gps",
"water_wells:source_type": "unprotected_well"
},
"geometry": {
"type": "Point",
"coordinates": [
-1.2430456,
10.3233693
]
}
},
maybe it is possible to extract all properties of each item independently from which one is present or not..... This can be de better way to solve the problem but I've no idea how to do that.
This is what I do (ckick the water tap to see pop-up): www.h2openmap.org/map
This is almost what I would like to do (ckick the water tap to see pop-up): overpass-turbo.eu/s/7Ov
Thank you for spending your time reading my question.
Have a nice day everyone, Francesco
You can access those properties using the bracketnotation, instead of using:
district = feature.properties.is_in:district;
Use bracketnotation:
district = feature.properties['is_in:district'];
Reference on property-accessors: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors
Now if you want to do something based on if a property exists there is a hasOwnProperty method available on objects. Since feature.properties is an object you can use that in a condition:
if (features.properties.hasOwnProperty('is_in:district')) {
// Property exists, do stuff
}
// or
if (!features.properties.hasOwnProperty('is_in:district')) {
// Property does not exist, do stuff
}
If you want to do something base on wether multiple properties exist you can use the && (and) operator:
if (features.properties.hasOwnProperty('is_in:district') &&
features.properties.hasOwnProperty('source:data')) {
// Properties exist, do stuff
}
// Or
if (!features.properties.hasOwnProperty('is_in:district') &&
!features.properties.hasOwnProperty('source:data')) {
// Properties do not exist, do stuff
}
You could use the || (or) operator to see if at least one of the conditions matches:
if (features.properties.hasOwnProperty('is_in:district') ||
features.properties.hasOwnProperty('source:data')) {
// At least one of the properties exist, do stuff
}
// Or
if (!features.properties.hasOwnProperty('is_in:district') ||
!features.properties.hasOwnProperty('source:data')) {
// At least one of the properties does not exist, do stuff
}
Reference for this can be found here under "Logical operators": https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators
You can use something like to build (or don't build) the data object that you need for your popup. Hope that helps.
Related
I have an JSON object with the structure below. When looping over key_two I want to create a new object that I will return. The returned object should contain a title with the value from key_one's name where the id of key_one matches the current looped over node from key_two.
Both objects contain other keys that also will be included but the first step I can't figure out is how to grab data from a sibling object while looping and match it to the current value.
{
"key_one": [
{
"name": "some_cool_title",
"id": "value_one",
...
}
],
"key_two": [
{
"node": "value_one",
...
}
],
}
This is a good example of a 'join' operation (in SQL terms). JSONata supports this in a path expression. See https://docs.jsonata.org/path-operators#-context-variable-binding
So in your example, you could write:
key_one#$k1.key_two[node = $k1.id].{
"title": $k1.name
}
You can then add extra fields into the resulting object by referencing items from either of the original objects. E.g.:
key_one#$k1.key_two[node = $k1.id].{
"title": $k1.name,
"other_one": $k1.other_data,
"other_two": other_data
}
See https://try.jsonata.org/--2aRZvSL
I seem to have found a solution for this.
[key_two].$filter($$.key_one, function($v, $k){
$v.id = node
}).{"title": name ? name : id}
Gives:
[
{
"title": "value_one"
},
{
"title": "value_two"
},
{
"title": "value_three"
}
]
Leaving this here if someone have a similar issue in the future.
In Elasticsearch, I have an object that contains an array of objects. Each object in the array have type, id, updateTime, value fields.
My input parameter is an array that contains objects of the same type but different values and update times. Id like to update the objects with new value when they exist and create new ones when they aren't.
I'd like to use Painless script to update those but keep them distinct, as some of them may overlap. Issue is that I need to use both type and id to keep them unique. So far I've done it with bruteforce approach, nested for loop and comparing elements of both arrays, but I'm not too happy about that.
One of the ideas is to take array from source, build temporary HashMap for fast lookup, process input and later store all objects back into source.
Can I create HashMap with custom object (a class with type and id) as a key? If so, how to do it? I can't add class definition to the script.
Here's the mapping. All fields are 'disabled' as I use them only as intermidiate state and query using other fields.
{
"properties": {
"arrayOfObjects": {
"properties": {
"typ": {
"enabled": false
},
"id": {
"enabled": false
},
"value": {
"enabled": false
},
"updated": {
"enabled": false
}
}
}
}
}
Example doc.
{
"arrayOfObjects": [
{
"typ": "a",
"id": "1",
"updated": "2020-01-02T10:10:10Z",
"value": "yes"
},
{
"typ": "a",
"id": "2",
"updated": "2020-01-02T11:11:11Z",
"value": "no"
},
{
"typ": "b",
"id": "1",
"updated": "2020-01-02T11:11:11Z"
}
]
}
And finally part of the script in it's current form. The script does some other things, too, so I've stripped them out for brevity.
if (ctx._source.arrayOfObjects == null) {
ctx._source.arrayOfObjects = new ArrayList();
}
for (obj in params.inputObjects) {
def found = false;
for (existingObj in ctx._source.arrayOfObjects) {
if (obj.typ == existingObj.typ && obj.id == existingObj.id && isAfter(obj.updated, existingObj.updated)) {
existingObj.updated = obj.updated;
existingObj.value = obj.value;
found = true;
break;
}
}
if (!found) {
ctx._source.arrayOfObjects.add([
"typ": obj.typ,
"id": obj.id,
"value": params.inputValue,
"updated": obj.updated
]);
}
}
There's technically nothing suboptimal about your approach.
A HashMap could potentially save some time but since you're scripting, you're already bound to its innate inefficiencies... Btw here's how you initialize & work with HashMaps.
Another approach would be to rethink your data structure -- instead of arrays of objects use keyed objects or similar. Arrays of objects aren't great for frequent updates.
Finally a tip: you said that these fields are only used to store some intermediate state. If that weren't the case (or won't be in the future), I'd recommend using nested arrays to enable querying independently of other objects in the array.
I want to create a custom angular schematic that can accept a collection of action names. I will then generate 3 ngrx actions for every action name provided from the user.
for example I want to create a schematic that can be invoked like this:
ng g my-collection:my-schematic --actions=GetById,GetByFirstName
Then I'll generate code for GetById, GetByIdSuccess, GetByIdError, GetByFirstName, GetByFirstNameSuccess, GetByFirstNameError.
The issue is I've only seen angular schematics that will accept a single value as an input parameter. Anyone know how to handle collections in a custom angular schematic?
you can follow this blog, it will teach you how to create your own schematics project:
https://blog.angular.io/schematics-an-introduction-dc1dfbc2a2b2
after you generate your schematics project in file collection.json you can extend the #ngrx/schematics:
{
...
"extends": ["#ngrx/schematics"],
}
and then use the ngrx schematics to generate 3 actions like this:
externalSchematic('#ngrx/schematics', 'action')
I haven't found a good example of how to an array of string into a schematic parameter, but I found a workaround. What I did was have a simple string input parameter that is consistently delimited (I used , to delimit the values). Here is my schema:
export interface Schema {
name: string;
path?: string;
project?: string;
spec?: boolean;
actions: string;
__actions: string[];
store?: string;
}
I parse the actions param that is provided and generate the string array __actions and use that property in my templates. Here is a snippet from my index.ts:
export default function(options: ActionOptions): Rule {
return (host: Tree, context: SchematicContext) => {
options.path = getProjectPath(host, options);
const parsedPath = parseName(options.path, options.name);
options.name = parsedPath.name;
options.path = parsedPath.path;
options.__actions = options.actions.split(',');
options.__actions = options.__actions.map(_a => classify(_a));
If you know of a better way to process these please share. Thanks!
You need to pass the actions multiple times.
ng g my-collection:my-schematic --actions=GetById --actions=GetByFirstName
Define the parameter as an array within your schema.json file.
...
"actions": {
"type": "array",
"items": {
"type": "string"
},
"description": "The name of the actions."
},
...
Also in your schema.ts.
export interface Schema {
actions: string[]
}
If you want to pull them right off of the command args, you can do the following:
{
"$schema": "http://json-schema.org/draft-07/schema",
"$id": "Sample",
"title": "Sample Schematic",
"type": "object",
"description": "Does stuff.",
"additionalProperties": false,
"properties": {
"things": {
"type": "array",
"items": {
"type": "string"
},
"$default": {
"$source": "argv"
},
"description": "Things from the command-line args."
}
}
}
Then when you run your schematic you can do:
schematics schematic-lib:sample stuff other-stuff more-stuff
In this case, the things property will be ['stuff', 'other-stuff', 'more-stuff'].
Edit: Note that the required value in the schema won't cause the schematic to fail if you don't provide any args. You'd need to do validation on that property in your schematic.
Most of the other methods in the language api, such as analyze_syntax, analyze_sentiment etc, have the ability to return the constituent elements like
sentiment.score
sentiment.magnitude
token.part_of_speech.tag
etc etc etc....
but I have not found a way to return name and confidence in isolation from classify_text. It doesn't look like it's possible but that seems weird. Am missing something? Thanks
The language.documents.classifyText method returns a ClassificationCategory object which contains name and confidence. If you only want one of the fields you can filter by categories/name or categories/confidence. As an example I executed:
POST https://language.googleapis.com/v1/documents:classifyText?fields=categories%2Fname&key={YOUR_API_KEY}
{
"document": {
"content": "this is a test for a StackOverflow question. I get an error because I need more words in the document and I don't know what else to say",
"type": "PLAIN_TEXT"
}
}
Which returns:
{
"categories": [
{
"name": "/Science/Computer Science"
},
{
"name": "/Computers & Electronics/Programming"
},
{
"name": "/Jobs & Education"
}
]
}
Direct link to API explorer for interactive testing of my example (change content, filters, etc.)
I'm trying to decide upon the best format of response for my API. I need to return a reports response which provides information on the report itself and the fields contained on it. Fields can be of differing types, so there can be: SelectList; TextArea; Location etc..
They each use different properties, so "SelectList" might use "Value" to store its string value and "Location" might use "ChildItems" to hold "Longitude" "Latitude" etc.
Here's what I mean:
"ReportList": [
{
"Fields": [
{
"Id": {},
"Label": "",
"Value": "",
"FieldType": "",
"FieldBankFieldId": {},
"ChildItems": [
{
"Item": "",
"Value": ""
}
]
}
]
}
The problem with this is I'm expecting the users to know when a value is supposed to be null. So I'm expecting a person looking to extract the value from "Location" to extract it from "ChildItems" and not "Value". The benefit to this however, is it's much easier to query for things than the alternative which is the following:
"ReportList": [
{
"Fields": [
{
"SelectList": [
{
"Id": {},
"Label": "",
"Value": "",
}
]
"Location": [
{
"Id": {},
"Label": "",
"Latitude": "",
"Longitude": "",
"etc": "",
}
]
}
]
}
So this one is a reports list that contains a list of fields which on it contains a list of fieldtype for every fieldtype I have (15 or something like that). This is opposed to just having a list of reports which has a list of fields with a "fieldtype" enum which I think is fairly easy to manipulate.
So the Question: Which format is best for a response? Any alternatives and comments appreciated.
EDIT:
To query all fields by fieldtype in a report and get values with the first way it would go something like this:
foreach(field in fields)
{
switch(field.fieldType){
case FieldType.Location :
var locationValue = field.childitems;
break;
case FieldType.SelectList:
var valueselectlist = field.Value;
break;
}
The second one would be like:
foreach(field in fields)
{
foreach(location in field.Locations)
{
var latitude = location.Latitude;
}
foreach(selectList in field.SelectLists)
{
var value= selectList.Value;
}
}
I think the right answer is the first one. With the switch statement. It makes it easier to query on for things like: Get me the value of the field with the id of this guid. It just means putting it through a big switch statement.
I went with the first one because It's easier to query for the most common use case. I'll expect the client code to put it into their own schema if they want to change it.