Here's Apple's official Doc example:
class Counter {
var count: Int = 0
func incrementBy(amount:Int, numberOfTimes times:Int){
count += amount * times
}
}
var counter = Counter()
counter.incrementBy(2, numberOfTimes: 8)
Actually, what's the difference with the following codes:
class Counter {
var count: Int = 0
func incrementBy(amount:Int, numberOfTimes:Int){
count += amount * numberOfTimes
}
}
var counter = Counter()
counter.incrementBy(2, numberOfTimes: 8)
why times is put inside in the official Doc?
i'm new to programming, can someone explain the theory behind?
Thx!!
numberOfTimes is the external parameter name/label, whereas times is the internal parameter name, used only inside the function. See Function Parameter Names for more information.
Related
I'd like to ask about my program bcs it doesn't work correctly. I want to recall a set of variable in two different Sequence Array. Here is my code.
// Array of Arrays
var SequenceGo:Array =
\[
{dt:dt1, P:P1, s0:s01, s:s1},
{dt:dt2, P:P2, s0:s02, s:s2},
{dt:dt3, P:P3, s0:s03, s:s3},
{dt:dt4, P:P4, s0:s04, s:s4},
{dt:dt5, P:P5, s0:s05, s:s5},
{dt:dt6, P:P6, s0:s06, s:s6},
{dt:dt7, P:P7, s0:s07, s:s7},
{dt:dt8, P:P8, s0:s08, s:s8},
{dt:dt9, P:P9, s0:s09, s:s9},
{dt:dt10, P:P10, s0:s010, s:s10},
\];
var SequenceBack:Array =
\[
{dtback:dt10back, P:P10, s0:s010, sback:s10back},
{dtback:dt9back, P:P9, s0:s09, sback:s9back},
{dtback:dt8back, P:P8, s0:s08, sback:s8back},
{dtback:dt7back, P:P7, s0:s07, sback:s7back},
{dtback:dt6back, P:P6, s0:s06, sback:s6back},
{dtback:dt5back, P:P5, s0:s05, sback:s5back},
{dtback:dt4back, P:P4, s0:s04, sback:s4back},
{dtback:dt3back, P:P3, s0:s03, sback:s3back},
{dtback:dt2back, P:P2, s0:s02, sback:s2back},
{dtback:dt1back, P:P1, s0:s01, sback:s1back}
\];
function onNext(index:int = 0):void
{
if (index >= SequenceGo.length)
{
return;
}
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = SequenceBack[index];
//variables
F = s_teganganst.value;
m = s_masjenst.value/10000;
v = Math.sqrt(F/m);
tp = 5000/v;
f = s_frekuensist.value;
w = 2*Math.PI*f;
aDataGo.dt += t;
aDataGo.s = aDataGo.s0 - A * Math.sin(w * aDataGo.dt);
aDataGo.P.y = aDataGo.s;
if(P10.y < 607){
aDataBack.dtback += t;
aDataBack.sback = - A * Math.sin(w * aDataBack.dtBack);
aDataBack.P.y = aDataGo.s + aDataBack.sback;
}
setTimeout(onNext, tp, index + 1);
}
Actually, code
aDataBack.P.y = aDataGo.s + aDataBack.sback;
is not a fit code for the animation because aDataBack is ordered inversely from aDataGo (we have to stay this inverse order for the proper animation in my program). I want to recall the variables based on its number, so each variable will match with another variable. For example,
P1.y = s1 + s1back;
P2.y = s2 + s2back;
P3.y = s3 + s3back;
P4.y = s4 + s4back;
//and so on
I've tried the code above, but it also doesn't work. Any other expression for calling some couples of variables just like my code above? Thanks!
I want to recall the variables based on its number, so each variable will match with another variable
Ok, there are two options.
Option one, simple and straightforward: compose a method to find the correspondent back object on spot:
function findBack(P:Object):Object
{
for each (var aDataBack:Object in SequenceBack)
{
if (aDataBack.P == P)
{
return aDataBack;
}
}
}
So, that piece of code would be
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = findBack(aDataGo.P);
The possible problem here is the performance. It is fine on the scale of 10 or 100 objects, but as (I suppose) you devise a particle system, the object count easily scales to thousands, and the amount of loop-searching might become cumbersome.
So I advise to prepare a pre-indexed hash so that you won't need to search each single time.
var SequenceBack:Array =
[
// ...
];
// Dictionary is a storage of key:value data, just like Object,
// but Dictionary allows Object keys.
var HashBack:Dictionary = new Dictionary;
for each (var aDataBack:Object in SequenceBack)
{
HashBack[aDataBack.P] = aDataBack;
}
I encourage you to read more about Dictionary class.
And so that piece of code would be
var aDataGo:Object = SequenceGo[index];
var aDataBack:Object = HashBack[aDataGo.P];
A complex question :
I've got this code (not the complete code, but the essentials for the question, I think) :
var $pmm:String;
var $pms:String;
var $bmm:String;
var $bms:String;
function get haute1():String { return $pmm; };
function get haute2():String { return $pms; }
function get basse1():String { return $bmm; };
function get basse2():String { return $bms; };
accueil.todayHaute_txt.htmlText = haute1;
accueil.todayBasse_txt.htmlText = basse1;
accueil.todayHauteSecond_txt.htmlText = haute2;
accueil.todayBasseSecond_txt.htmlText = basse2;
"haute1" is an hour (in 24h format). Something like "13h25".
It changes everyday.
Question : How can put them in ascending order in AS3 ?
Example : If haute1 = 15h20, haute2= 6h00, basse1= 11h and basse2 = 17h, the function would put them in this order :
"haute2", then "basse1", then "haute1" and finally "basse2".
Thx
EDIT
I add this code that I have. is it helping you ?
/ Assigns hours and tidal heights
$pmm = convdateheure($tpbs[1 + $deltapm]);
$pms = convdateheure($tpbs[3 + $deltapm]);
$bmm = convdateheure($tpbs[2 - $deltapm]);
$bms = convdateheure($tpbs[4 - $deltapm]);
function convdateheure($valeur:Number):String
{
var $heure:Number = Math.floor($valeur);
var $minute:Number = Math.floor(Math.floor(($valeur - Math.floor($valeur)) * 100) * 0.6);
var hoursLabel:String = "", minsLabel:String = "";
if ($heure == 24) $heure = 0; // Check if at the 24 hour mark, change to 0
if ($heure < 10) hoursLabel += "0" + $heure.toString(); else hoursLabel = $heure.toString();
if ($minute < 10) minsLabel += "0" + $minute.toString(); else minsLabel = $minute.toString();
return hoursLabel + ":" + minsLabel;
}
If you want to order some dates written in some String format:
One way would be, depending on you date string format, just to push them into array and sort them as strings, then read them all.
Another way would be to first parse those strings into Date instances, and push their Date.time property to array, sort it, then do reverse: parse all time values from sorted array into new Date instances then use Date.toString or similar.
Assuming that $valuer is a numerical value:
var timesArray:Array = new Array();
var convertedTimesArray:Array = new Array();
function sortTimes():void{
timesArray.push($valuer);
timesArray.sort(Array.NUMERIC);
}
function convertTimes():void{
convertedTimesArray = []; // clear the array
for (var i:int = 0; i < timesArray.length; i++){
var s:String = convdateheure(timesArray[i]);
convertedTimesArray.push(s);
}
}
That should give you one array of actual times, sorted in numerical order, and one array sorted in the same numerical order, but converted to String values using your function.
I have a date like:
19/août/2016 (août = august)
And I have the following function which changes the month into a number:
function swapMonthForNumber(str:String):String {
//do the same line of code for every item in the array
for(var i:int=0;i<months.length;i++){
//i is the item, which is 0 based, so we have to add 1 to make the right month number
str = str.replace(months[i],String(+i+1));
}
//return the updated string
return str;
}
str = swapMonthForNumber(mySharedObject.data.theDate);
trace("Php will use this date :"+str);
So str will be 19/8/2016, but I want str to be 19/08/2016 (adding a 0 before the 8).
How can I do this?
Check out the reference of the Date class!
If forgot to mention this link : flash.globalization.DateTimeFormatter
DateTimeFormatter(requestedLocaleIDName:String, dateStyle:String = "long", timeStyle:String = "long")
Here is an example.
import flash.globalization.DateTimeFormatter;
var df:DateTimeFormatter = new DateTimeFormatter(LocaleID.DEFAULT, DateTimeStyle.SHORT, DateTimeStyle.NONE);
var currentDate:Date = new Date(2016,7,19);
var shortDate:String = df.format(currentDate);
trace (shortDate);
// output : 19/08/2016
DateTimeStyle
LocaleID
Adding leading zeros to a number is commonly called zero padding.
Below is a function to do this, from the answer here.
public function zeroPad(number:int, width:int):String {
var ret:String = ""+number;
while( ret.length < width )
ret="0" + ret;
return ret;
}
In your swapMonthForNumber function, in the for loop, swap the code for this:
var month = zeroPad(i + 1, 2);
str = str.replace(months[i], month);
I have a Goggle Spreadsheet with some data, and I want to write a custom function to use in the sheet, which accepts a range of cells and a delimiter character, takes each cell value, splits it by the delimiter, and counts the total.
For example
Column A has the following values in rows 1-3: {"Sheep","Sheep,Dog","Cat"}
My function would be called like this: =CountDelimitedValues(A1:A3;",");
It should return the value: 4 (1+2+1)
The problem I am having is in my custom script I get errors like
"TypeError: cannot get function GetValues from type Sheep"
This is my current script:
function CountArrayList(arrayList, delimiter) {
var count = 0;
//for (i=0; i<array.length; i++)
//{
//count += array[i].split(delimiter).length;
//}
var newArray = arrayList.GetValues();
return newArray.ToString();
//return count;
}
I understand that the parameter arraylist is receiving an array of objects from the spreadsheet, however I don't know how to get the value out of those objects, or perhaps cast them into strings.
Alternatively I might be going about this in the wrong way? I have another script which extracts the text from a cell between two characters which works fine for a single cell. What is it about a range of cells that is different?
That's something you can achieve without using script but plain old formula's:
=SUM(ARRAYFORMULA(LEN(A1:A3)-LEN(SUBSTITUTE(A1:A3; ","; "")) + 1))
Credit goes here: https://webapps.stackexchange.com/q/37744/29140
something like this works :
function CountArrayList(arrayList) {
return arrayList.toString().split(',').length
}
wouldn't it be sufficient ?
edit Oooops, sorry I forgot the user defined delimiter, so like this
function CountArrayList(arrayList,del) {
return arrayList.toString().split(del).length
}
usage : =CountArrayList(A1:C1;",")
NOTE : in this example above it would be dangerous to use another delimiter than "," since the toString() joins the array elements with commas... if you really need to do so try using a regex to change the commas to what you use and apply the split on that.
try like this :
function CountArrayList(arrayList,del) {
return arrayList.toString().replace(/,/g,del).split(del).length
}
Another solution I have was that I needed to implicitly cast the objects in the array being passed as a string.
For example this function accepts the array of cells, and outputs their contents as a string with del as the delimiter (similar to the String.Split() function). Note the TrimString function and that it is being passed an element of the array.
function ArrayToString(array,del) {
var string = "";
for (i=0; i < array.length; i++) {
if (array[i] != null) {
var trimmedString = TrimString(array[i]);
if (trimmedString != "") {
if (string.length > 0) {
string += del;
}
string += trimmedString;
}
}
}
return string;
}
Below is the TrimString function.
function TrimString(string) {
var value = "";
if (string != "" && string != null) {
var newString = "";
newString += string;
var frontStringTrimmed = newString.replace(/^\s*/,"");
var backStringTrimmed = frontStringTrimmed.replace(/\s*$/,"");
value = backStringTrimmed;
}
return value;
}
What I found is that this code threw a TypeError unless I included the declaration of the newString variable, and added the array element object to it, implicitly casting the array element object as a string. Otherwise the replace() functions could not be called.
I am reading a file which contains approx 1200 words in the following format:
words:a:/zenb:/fixx:/wew:/sina:/benb:/sixx:/hew:/bin
I need to find how many keywords are there in that text file, by keyword i mean:
zen fix we sin ben six he bin
Right now I am trying to do it with RegExp like this:
var s:String = "words:b:sa:/zenb:/fixx:/wew:/sina:/benb:/sixx:/hew:/bin";
var pattern:RegExp = /:/+/g;
var results:Array = s.match(pattern);
trace(results.length);
Its producing an error, since I am a beginner I really don't understand how this RegExp work , are there any alternate methods to get the same results?
Thanks
Your var pattern:RegExp = /:/+/g; has a syntax error, you skipped a backslash \ change this to :
var pattern:RegExp = /:\/+/g;
and it should work, Alternatively with this format you can use the String split method to get the total word count. Try this:
var s:String = "words:b:sa:/zenb:/fixx:/wew:/sina:/benb:/sixx:/hew:/bin";
var wordCount:Number = s.split(":/").length -1;
trace( wordCount );
Hope that works.
package
{
import flash.display.Sprite;
public class CountWordsExample extends Sprite
{
public function CountWordsExample()
{
super();
// 8 7 0
trace(countWords(
"words:b:sa:/zenb:/fixx:/wew:/sina:/benb:/sixx:/hew:/bin",
":/"),
countWords(
"words:b:sa:/:/fixx:/wew:/sina:/benb:/sixx:/hew:/bin",
":/"),
countWords(
"words:b:sa::zenb::fixx::wew::sina::benb::sixx::hew::bin",
":/"));
}
public static function countWords(words:String, delimiter:String,
countBlanks:Boolean = false):uint
{
var result:uint;
var wordPointer:int = -1;
var delimiterPointer:int;
var delimiterLength:uint = delimiter.length;
if (words.length >= delimiterLength)
{
do
{
delimiterPointer = wordPointer;
wordPointer = words.indexOf(
delimiter, wordPointer + delimiterLength);
if (countBlanks ||
// we moved by more characters, then the length of
// delimiter
wordPointer - delimiterLength > delimiterPointer)
result++;
}
while (wordPointer > -1)
}
return result;
}
}
}
Here's an example of how to count words without ever creating additional arrays or sub-strings of the original string. It also verifies that the words counted have at least one character length.