Thank you in advance! I'm new to coding and learning how to deal with Arrays. I am trying to remove random items from an array (deck of cards), and populate a new array (called hand). The problem I always seem to have with arrays is taking the results of one and creating a new function/array/ etc.. Currently, I am outputting 2 separate arrays and I can't seem to push them into one.
let deck = ["dA","dQ","dK","dJ","d10","d09","d08",
"d07","d06","d05","d04","d03","d02","hA","hQ","hK",
"hJ","h10","h09","h08","h07","h06","h05","h04","h03"];
var hand = deck.splice(Math.floor(Math.random()*deck.length),1);
console.log(hand)
var hand = deck.splice(Math.floor(Math.random()*deck.length),1);
console.log(hand);
In your code, just you need to push the value returned from splice method rather than directly assigning it.
By this way every time a new value that gets deleted and will be added to the new array called hand. Hope this helps. :-)
let deck = ["dA","dQ","dK","dJ","d10","d09","d08",
"d07","d06","d05","d04","d03","d02","hA","hQ","hK",
"hJ","h10","h09","h08","h07","h06","h05","h04","h03"];
var hand = [];
const getSelectedCard = () => deck.splice(Math.floor(Math.random()*deck.length),1)
let selectedCard = getSelectedCard();
hand.push(...selectedCard) //or hand.push(selectedCard[0])
console.log(hand);
selectedCard = getSelectedCard();
hand.push(...selectedCard)
console.log(hand);
Related
I am creating an app that gives rewards to the users, so they can obtain randomly complements to their avatars. I have a list of items that they can win and another list of items that they already have. My problem is that I don't know how to look for a match between the two arrays and create another without the ones that they already have.
var availableAvatar =['Csimple','Calien','Ccosmonaut','CgreenAereal','ChappyBirthday']
var userAvatars=['Ccosmonaut','ChappyBirthday']
I tried with the filter method but it creates an array of the matches and I don't know how to do it the other way.
What I need:
var possibleAward=['Csimple','Calien','CgreenAereal']
var random = avatarP[Math.floor(Math.random() * possibleAward.length)];
Thank you very much.
The array filter function is perfect for this:
var availableAvatars = ['Csimple','Calien','Ccosmonaut','CgreenAereal','ChappyBirthday']
var userAvatars = ['Ccosmonaut','ChappyBirthday']
var possibleAvatars = availableAvatars.filter(x => !userAvatars.includes(x));
var randomAvatar = possibleAvatars[Math.floor(Math.random() * possibleAvatars.length)];
console.log(possibleAvatars);
console.log(randomAvatar);
var availableAvatar =['Csimple','Calien','Ccosmonaut','CgreenAereal','ChappyBirthday']
var userAvatars=['Ccosmonaut','ChappyBirthday']
var possibleRewards = availableAvatar.filter(element => {
return !userAvatars.includes(element);
});
console.log(possibleRewards);
So I have a db document that holds some string values in an array, I want to push just the array from every entry into an array in the application for usage later, But I can see the array fine on the fetch, and when I iterate it but my "Global array" is staying empty can someone explain why?
specialDates : Specialdates[] = [];
specialRange: any[] = [];
this.specialDates.forEach(ag => {
//ag,range -> I can see fine
this.specialRange.push(ag.range);
//this.specialrange -> Stays empty
});
Array looks something like the following:
1205,1206,1207,1208
What is wrong with this approach?
Reason for doing this is because the documents have 2 fields minimum: EG ->
ID/Array
And I just need the array
this.specialRange = this.specialDates.map(ag => ag.range)
I have a collection of $linesheetItems, now I need to loop these $linesheetItems inside a foreach loop and store a seasons array by using line sheet item's season code ($linesheetItem['season']). But according to my current code, it returns an empty array.
Code:
$seasons = [];
foreach($linesheetItems as $linesheetItem) {
$seasons = Season::where('code', $linesheetItem['season'])->get();
}
dd($seasons);
How to achieve this, and what are the modifications should I do to my code?
In your code, you are overriding the $seasons variable each time the loop runs. In order to add an item to an array you have to set $seasons[] = Season::where('code', $linesheetItem['season'])->get();. This will always push a new item into the array. If you want to have custom keys on the array, you can do $seasons['your-key'] = Season::where('code', $linesheetItem['season'])->get();
I'm working on a form where I need to pull the contents of a spreadsheet column like 50 times, to try to input multiple items from a list. I see that I can do this by defining a few variables and redoing a small piece of Script again and again. I want to see if anyone can help me overcome this lengthy script to make it smaller with fewer iterations. Thanks.
function updateForm(){
// call the form and connect to the drop-down items
var Form_SQ = FormApp.openById("FORM ID");
var SQ_IT01_List = Form_SQ.getItemById("ITEM 01").asListItem();
var SQ_IT02_List = Form_SQ.getItemById("ITEM 02").asListItem();
//Similarly defining upto 50 dropdown lists.
var SS01 = SpreadsheetApp.getActive();
var SQ_IT01_Names = SS01.getSheetByName("Sheet2");
var SQ_IT02_Names = SS01.getSheetByName("Sheet2");
//Similarly defining upto 50 names lists.
// Item_01 Part Number Dropdown
var SQ_IT01_Values = SQ_IT01_Names.getRange(2, 1, SQ_IT01_Names.getMaxRows() - 1).getValues();
var SQ_IT01_Items = [];
for(var i = 0; i < SQ_IT01_Values.length; i++)
if(SQ_IT01_Values[i][0] != "")
SQ_IT01_Items[i] = SQ_IT01_Values[i][0];
SQ_IT01_List.setChoiceValues(SQ_IT01_Items);
// Item_02 Part Number Dropdown
var SQ_IT02_Values = SQ_IT01_Names.getRange(2, 1, SQ_IT02_Names.getMaxRows() - 1).getValues();
var SQ_IT02_Items = [];
for(var i = 0; i < SQ_IT02_Values.length; i++)
if(SQ_IT02_Values[i][0] != "")
SQ_IT02_Items[i] = SQ_IT02_Values[i][0];
SQ_IT02_List.setChoiceValues(SQ_IT02_Items);
//Similarly defining upto 50 lookup lists.
}
Problem
Reusing code and making use of loops. Scripting is all about efficiency (see DRY principle): make as little assignments and same-functionality coding as possible - use loops, move reusable code snippets to functions that can be called on demand, etc.
Solution
This sample makes several assumptions:
SQ_IT01_Names is different for each item (in your sample it always is Sheet2 - if this is the case, you don't have to reassign it 50 times, one variable assignment will do just fine).
You intended to do something when a value is an empty string (the sample just filters them out). As you use the [index] notation, those values in the resulting Array will be undefined (and that's not something one would want in an Array of choice values).
All items are choice items (if you need id filtering, the sample is easily expanded).
function updateForm() {
var form = FormApp.openById("FORM ID");
//access every item;
var items = form.getItems();
var ss = SpreadsheetApp.getActive();
//loop over items;
items.forEach(function(item,i){
var namesSheet = ss.getSheetByName('Sheet'+i); //assuming this is diff each time;
var namesRange = namesSheet.getRange(2,1,namesSheet.getLastRow());
var namesValues = namesRange.getValues();
//map values to first column;
namesValues = namesValues.map(function(value){
return value[0];
});
//filter out undefined (undefined and false functional equivalence);
namesValues = namesValues.filter(function(value){
return value;
});
item.asListItem().setChoiceValues(namesValues);
});
}
Notes
Please, use closures {} with loops and if statements, this way you'll be able to keep track of which statements are enclosed in it and save yourself debugging time when looping / conditioning multiple statements.
Since you only need rows that have data in them, use the getLastRow() method instead of the getMaxRows()-1 calc you have to perform in your script.
Reference
forEach() method reference;
filter() method reference;
map() method reference;
getLastRow() method reference;
Up until now I have been creating var inside the classes I made. e.g.
var backpack:Array = new Array("food", "water");
I want to create objects dynamically now like:
player = {};
player.backpack = ("food", "water"); // not the right syntax
OR
player = {backpack:Array = new Array("food", "water")} // not right either.
Any help? Thanks in advance. I can do this with simple vars like int, but can't find the answer to arrays.
ActionScript's generic object properties don't have any variable type associated with them. You assign them one of the following ways.
Example 1
player = {backpack: new Array("food", "water")};
Example 2
player.backpack = new Array("food", "water");
Example 3
player["backpack"] = new Array("food", "water");
You can use square brackets to define literal arrays. Not only is it shorter, but it's also faster (see this post).
The correct syntax for your two examples are
player = {};
player.backpack = ["food", "water"];
and
player = {backpack: ["food", "water"]};
Also, if you find it easier, you can use it in the first line of code you wrote.
var backpack:Array = ["food", "water"];