[https://i.imgur.com/4wFEh1v.jpg][1]
You can see in image. I want to write count for this array. red box is analytic for attr of objects in array. i tried count Present,Late,Leave,...when list item checked with present or Late or Leave,...
How to count them. Please help code in angularjs or lodash. Thank you!
$scope.CountStudents = _.countBy($scope.Students, 'length');
console.log($scope.CountStudents);
You're not very clear about what exactly your problem is (besides learning AngularJS and Lodash ;-) ) and surely omitted a lot of required information.
However, just guessing:
With lodash's filter() function you can excerpt only those elements of a list that match a condition:
$scope.countAbsent = _.filter(students, {AbsentStatus: 'whatever'}).length;
To give you the number of students with 'whatever' as the AbsentStatus.
Related
I'm trying to write a cell formula which can essentially create a single playlist of songs.
Currently the songs are grouped by decade, but I'd like to be able to see a single list of everything that has been ticked.
I tried an array formula, but it only returned the first ticked song. Plus not sure how to make the array formula include the adjacent lists.
I tried a FILTER function, it works for one list of songs, but I don't know how to get it to append the other lists on the end.
Could I use a QUERY function? Not sure how though.
Many thanks!
try:
={"LIST"; FILTER({C:C; F:F}; {B:B; E:E}=TRUE)}
awesome question! You were super close in your filter example, one more filter in your array would've done it :)
Example Image:
Example Formula:
={"LIST"; FILTER(C:C, B:B=TRUE); FILTER(F:F, E:E=TRUE)}
I have a variable descriptions that is an Option[JsonArray] (JsonArray results from calling getJsonArray on a JsonObject). descriptions is a list of objects that I'm getting back as a response from a server. Each object has a structure like so:
{age: String,
number: Long,
link: String}
I'd like to loop through this JsonArray and edit the link field to a certain value that is returned from a function. I don't even need to edit it in place and can take a new array of objects. In JS, it might be as simple as descriptions.map(d => ({...d, link: someValue})) but I'm not sure how I need to transform the JsonArray to get this working in Scala. Any help is appreciated!
#mysl didn't provide necessary details as mentioned in the comments. So I'm going to speculate that the approach you've proposed didn't work and you want to understand why.
Most probably you've assumed that JsonArray would be mutated when you .map a lambda over it (which is the case for Javascript I guess). That's not true in Scala case. I.e. when you map a list over you've got another list. I.e. .map, as the name assumes, is just a way to map one collection to another.
So what you need to do is:
val originalJsonArray = ...
val updatedJsonArray = originalJsonArray.map { description =>
description.copy(link = description.link.replace("foo","bar"))
}
println(s"originalJsonArray=$originalJsonArray, updatedJsonArray=$updatedJsonArray")
I hope that helps, though I'm not sure I guessed your problem correctly.
I have an array with a few items in it. Every x seconds, I receive a new array with the latest data. I check if the data has changed, and if it has, I replace the old one with the new one:
if (currentList != responseFromHttpCall) {
currentList = responseFromHttpCall;
}
This messes up the classes provided by ng-animate, as it acts like I replaced all of the items -- well, I do actually, but I don't know how to not.
These changes can occur in the list:
There's one (or more) new item(s) in the list - not necessaryly at the end of the list though.
One (or more) items in the list might be gone (deleted).
One (or more) items might be changed.
Two (or more) items might have been swapped.
Can anyone help me in getting ng-animate to understand what classes to show? I made a small "illustation" of my problem, found here: http://plnkr.co/edit/TS401ra58dgJS18ydsG1?p=preview
Thanks a lot!
To achieve what you want, you will need to modify existing list on controller (vm.list) on every action. I have one solution that may work for your particular example.
you would need to compare 2 lists (loop through first) similar to:
vm.list.forEach((val, index)=>{
// some code to check against array that's coming from ajax call
});
in case of adding you would need to loop against other list (in your case newList):
newList.forEach((val, index)=>{
// some code to check array on controller
});
I'm not saying this is the best solution but it works and will work in your case. Keep in mind - to properly test you will need to click reset after each action since you are looking at same global original list which will persist same data throughout the app cycle since we don't change it - if you want to change it just add before end of each function:
original = angular.copy(vm.list);
You could also make this more generic and put everything on one function, but for example, here's plnkr:
http://plnkr.co/edit/sr5CHji6DbiiknlgFdNm?p=preview
Hope it helps.
I am having different objects like in the code sample below. I have some checkboxes that filters based on brewer, style, aroma and country. It is filtering only if it has one property in the array.
What is the best solution to make the filter work based on all the elements in the array? I checked some other questions and I couldn't find anything related.
It will be great if any of you could help me.
Thanks.
sample of the code here: http://pastie.org/10787362
You could use filter method of Javascript Array() object.
For example:
$scope.filteredNames = $scope.names.filter(function(element) {
return
'brewer1' in element.brewers &&
'aroma1' in element.aromas
;
});
$scope.filteredNames should contain all names with 'brewer1' value in brewers property AND 'aroma1' value in aromas property...
I don't want to use any Javascript code or $scope variable.
Just want to print 1,2,3,4,5 values in Drop Down using ng-options.
This is what I have tried:
<select ng-name="priority" ng-options="priority for priority in Range(1, 5)"></select>
Working solution, within your requirements:
<select ng-model="priority" ng-options="priority for priority in [1,2,3,4,5]"></select>
Just in case, here's the plnkr to experiment with. If you have a quick look at the angular source code, you will see that ng-options requires select element as well as ng-model. Not sure what is the Range implementation mentioned in your example, but here is a very creative thread on this topic. Though, if your array is always the same and you really don't want to use scope (but why?), you're better off with the solution above.