I want to remove the first four indexes from the array using splice(), then rebuild the array starting at index 0. How do I do this?
Array.index[0] = 'one';
Array.index[1] = 'two';
Array.index[2] = 'three';
Array.index[3] = 'four';
Array.index[4] = 'five';
Array.index[5] = 'six';
Array.index[6] = 'seven';
Array.index[7] = 'eight';
Array.splice(0, 4);
Array.index[0] = 'five';
Array.index[1] = 'six';
Array.index[2] = 'seven';
Array.index[3] = 'eight';
I am accessing the array via a timer, on each iteration I want to remove the first four indexes of the array. I assumed splice() would remove the indexes then rebuild the array starting at 0 index. it doesn't, so instead what I have done is created a 'deleteIndex' variable, on each iteration a +4 is added to deleteIndex.
var deleteIndex:int = 4;
function updateTimer(event:TimerEvent):void
{
Array.splice(0,deleteIndex);
deleteIndex = deleteIndex + 4;
}
What type of object is "Array" in the code you have shown? The Flash Array object does not have a property named "index". The Array class is dynamic, which means that it let's you add random properties to it at run time (which seems to be what you are doing).
In any case, if you are using the standard Flash Array class, it's splice() method updates the array indexes automatically. Here is a code example that proves it:
var a:Array = [1,2,3,4,5];
trace("third element: ", a[2]); // output: 3
a.splice(2,1); // delete 3rd element
trace(a); // output: 1,2,4,5
trace(a.length); // ouput: 4
trace("third element: ", a[2]); // output: 4
If I am understanding what you want correctly, you need to use the unshift method of Array.
example :
var someArray:Array = new Array(0,1,2,3,4,5,6,7,8);
someArray.splice(0,4);
somearray.unshift(5,6,7,8);
Also, you are using the Array Class improperly, you need to create an instance of an array to work with first.
The question is confusing because you used Array class name instead of an instance of an array. But as the commenter on this post said, if you splice elements, it automatically re-indexes.
im not sure what you want to do, but Array=Array.splice(0,4) should fix somethin..
Related
Ok so I have a spreadsheet which we extract a 2d array of values from.
But really I want one variable per line of this 2d array.
The following code does work... but is this the best way to do it?
function testAssignments(){
config = ss.getRange("C2:C6").getValues();//2D Array
result = []
config.forEach(x => result.push(x[0]))
var [a,b,c,d,e] = result;
console.log(a,b,c,d,e);
}
I also tried the line config.forEach(x=> x=x[0]) but that didn't work for some reason.
Use .flat instead of .forEach and .push. If you want a different variable name for each element, there isn't a better way.
const [a,b,c,d,e] = ss.getRange("C2:C6").getValues().flat();//1D Array
//or
const [[a],[b],[c],[d],[e]] = ss.getRange("C2:C6").getValues();
I have created multiple instances of one object each with there own instance names with numbers on the end. I would like to iterate through these names (they have numbers on the end), modify there properties then push them to an array all through the instance names not the actual object instances.
if (instance60.currentFrame == 4)
{
array.push("instance60")
}
Where the first instance60 is refering to the object itself and the second instance60 is just a pushed string
I think what you are looking to do is set a key value pair.
The key would be how you find the reference to the object later
instances["instance"+60] = instance60;
you can loop using something like:
for(var i:uint=0;i<instances.length;i++){
instances["instance"+i] = new Sprite();
instances["instance"+i].x = 20;
instances["instance"+i].y = 20*i;
//etc...
}
But, although this has it's uses, in this case you are iterating through an integer value anyways, so, given it can run quite a bit faster on large arrays, why not just store them at their position in the array?
for(var i:uint=0;i<instances.length;i++){
instances[i] = new Sprite();
instances[i].x = 20;
instances[i].y = 20*i;
this.addChild(instance[i]);
//etc...
}
I am making a pretty neat quiz-game in flashCC right now and I definitely need your help.
My skills are more on the design then the programming side. So to many of you this might seem a baby question (and asked many times before) but from all the answers I saw so far, I couldn't get any results for my project.
So here is the thing :
I need the EXACT script for creating an array (with movieclips inside? or instance names of mcs? How does this even work?)
and a method, to pick a random element of this array without repeats until the "game is over".
Paul
The easiest way to pick a random element from an array without repeating is to first sort the array with a "random" function, then pop or shift items out of it until the array is empty.
Let's say you have an array of items which can be filled with either instances or instance names, you've chosen instance names: :
var FirstArray:Array = ["blau", "orange", "green"];
Now, you'll need a random sort function:
// you do not need to modify this function in any way.
// the Array.sort method accepts a function that takes in 2 objects and returns an int
// this function has been written to comply with that
function randomSort(a:Object, b:Object):int
{
return Math.random() > .5 ? -1 : 1;
}
The way a sort function normally works is it compares two objects and returns -1 if the first item precedes the second item, 1 if the opposite is true, and 0 if they are the same.
So what we're doing in the function above is returning -1 or 1 randomly. This should get the array all jumbled up when you call:
FirstArray.sort(randomSort);
Now that the array is randomly sorted, you can begin pulling items from it like so:
if(FirstArray.length) // make sure there's at least one item in there
{
// since you are using instance names, you'll need to use that to grab a reference to the actual instance:
var currentQuizItem:MovieClip = this[FirstArray.pop()];
// if you had filled your array with the actual instances instead, you would just be assigning FirstArray.pop() to currentQuizItem
// every time you call pop on an array, you're removing the last item
// this will ensure that you won't repeat any items
// do what you need to do with your MovieClip here
}
else
{
// if there aren't any items left, the game is over
}
When strung together, the above code should be enough to get you up and running.
You could try something like:
var array:Array = [1, 2, 3, 4, 5];
var shuffledArray:Array = [];
while (array.length > 0)
{
shuffledArray.push(array.splice(Math.round(Math.random() * (array.length - 1)), 1)[0]);
}
trace('shuffledArray: ', shuffledArray, '\nrandom item: ', shuffledArray[0]);
I was trying to make a similar thing with the game SameGame (ie. the block above the removed blocks fall downward). Before trying this with an Array that contains MovieClips, this code worked (tried it with int values). With MovieClips on the array, it seems not working the same way.
With int values, example:
popUp(0, 4): Before: 1,2,3,4,5,6,7,8,9,10; After: 1,2,3,4,6,7,8,9,10
But with MovieClips:
popUp(0, 4): Before: 1,2,3,4,5,6,7,8,9,10; After; 1,2,3,4
// Assume the numbers are movieclips XD
Basically, it strips everything else, rather than just the said block >_<
Here's the whole method. Basically, two extra arrays juggle the values above the soon-to-be removed value, remove the value, then re-stack it to the original array.
What could be wrong with this? And am I doing the right thing for what I really wanted to emulate?
function popUp(col:uint, row:uint)
{
var tempStack:Array = new Array();
var extraStack:Array = new Array();
tempStack = IndexArray[col];
removeChild(tempStack[0]);
for(var ctr:uint = tempStack.length-(row+1); ctr > 0; ctr--)
{
removeChild(tempStack[ctr]);
extraStack.push(tempStack.pop());
trace(extraStack);
}
tempStack.pop();
for(ctr = extraStack.length; ctr > 0; ctr--)
{
tempStack.push(extraStack.pop());
//addChild(tempStack[ctr]);
}
IndexArray[col] = tempStack;
}
PS: If it's not too much to ask, are there free step-by-step guides on making a SameGame in AS3 (I fear I might not be doing things right)? Thanks in advance =)
I think you just want to remove an element and have everything after that index shift down a place to fill what you removed. There's an inbuilt function for this called splice(start:uint, length:uint);
Parameters:
start - the index to start removing elements from
length - the amount of elements to remove
var ar:Array = ["hello","there","sir"];
ar.splice(1, 1);
ar is now -> ["hello", "sir"];
As per question:
Here's an example with different types of elements:
var ar:Array = [new MovieClip(), "some string", new Sprite(), 8];
ar.splice(2, 1);
trace(ar); // [object MovieClip], some string, 8
And further example to display the indexes being changed:
trace(ar[2]); // was [object Sprite], is now 8
How to make a kind of array that index things based on a object? but not being strict like dictionary.
What I mean:
var a:Object = {a:3};
var b:Object = {a:3};
var dict:Dictionary = new Dictionary();
dict[a] = 'value for a';
// now I want to get the value for the last assignment
var value = dict[b];
// value doesn't exits :s
How to make something like that. TO not be to heavy as a lot of data will be flowing there.
I have an idea to use the toString() method but I would have to make custom classes.. I would like something fast..
Why not make a special class that encapsulates an array, put methods in there to add and remove elements from the array, and then you could make a special method (maybe getValueByObject(), whatever makes sense). Then you could do:
var mySpecialArrayClass:MySpecialArrayClass = MySpecialArrayClass();
var a:Object = {a:3};
var b:Object = {a:3};
mySpecialArrayClass.addElement(a,'value for a');
var value = mySpecialArrayClass.getValueByObject(a);
I could probably cook up a simple example of such a class if you don't follow.
Update:
Would something like this help?
http://snipplr.com/view/6494/action-script-to-string-serialization-and-deserialization/
Update:
Could you use the === functionality? if you say
if ( object === object )
it compares the underlying memory address to see if two objects are the same reference...