Attempting to loop through this array, stored in a JSON file. I want to be able to check if a quote is saved and then display it depending on whether it is saved or not.
_toggleCheck() {
var checked = !this.state.checked;
this.setState({ checked: checked });
// For loop to run through arrray and update booleans
for(int i = 0; i<quotesArray.length-1; i++;){
quotes.quotesArray[i].isSaved = checked;
}
this.props.onChange && this.props.onChange(this.props.name, checked);
}
In attempting to do this, I have come across this error and can not resolve it. Line 63 is the beginning of the for loop. I dont know how to use a for loop in react native and cant find any tutorials on line.
for(int i = 0; i<quotesArray.length-1; i++;){
^ remove this semicolon
By the way, are you sure you want i < quotesArray.length - 1 instead of i < quotesArray.length? You're skipping the last element when you add -1.
Related
Im trying to via a for-loop remove all the items that matches a condition in the state array. But it seems to only be removing the last items in the array and not the ones that matches. Am I using the .splice() incorrectly? Thanks in advance. Code is:
rmTravel() {
for(var i = 0; i < this.cards.length; i++){
if(this.cards[i].sg_categories.includes("travel")){
this.cards.splice(i, 1);
console.log('Removed following card:', this.cards[i].slug)
}
}
console.log('Cards in cards state: ', this.cards)
}
This is a bit of a classic problem; you're iterating forward and shrinking the array at the same time so you're going to end up skipping over records.
I suggest using Array.prototype.filter() instead
this.cards = this.cards.filter(({ sg_categories }) =>
!sg_categories.includes('travel'))
This will reduce the array to entries who's sg_categories property does not include "travel".
First time poster here for Google Script related services, hopefully I put it in the right place! I'm encountering an error and I can't seem to find the right terminology to look up a solution. Below is the function. Within it I have a variable, string1, that I apply the split to. If I hard-code the value of the string (in the line commented out in the string), then it works and I receive the correct output. If, on the other hand, I try to pass that string into the function from another function, I receive the following error:
"TypeError: Cannot find function split in object Wed Oct 30 2013 09:00:26 GMT-0400 (EDT),danno,ticket,netid,request,mac,Error - Invalid Mac / Mac Not Found."
Note: My call to the function looks like this - formatEmailRow(completeEmailArray[i])
function formatEmailRow(rowToFormat) {
var formattedString = "";
var array1 = [];
var string1 = "";
///////////////////////
string1 = rowToFormat;
//string1 ="10/30/2013 9:00:26,danno,ticket,netid,request,mac,Error - Invalid Mac / Mac Not Found ";
///////////////////////
array1 = string1.split(",| ,|, ");
if (array1 != ""){
for (var i = 0; i < array1.length; i++) {
formattedString = formattedString + " " +(array1[i]);
}}
return formattedString;
}
Please help!
Thanks ahead of time, any advice is appreciated!
-Danno
You're getting that error because .split() isn't a method contained in the type of object you've passed in. Since you're new to this, it's worth a pause to read up on Objects and Methods - this is a quick overview.
You want to receive a String, but it seems that you're not. The problem will be with the code that's calling formatEmailRow().
My guess is that you're passing an array - probably all the cells in a row - but here's how you can check.
Add this line as the first line in your function:
Logger.log("rowToFormat = " + JSON.stringify(rowToFormat));
... then run, with your error. Check the logs - you want to see that you are getting a simple string. If you're getting an array, then you know what you need to fix. (Maybe you want to get the array after all!)
basically I need a loop within a loop to compare two different arrays in my actionscript3 lottery game.
I have attempted the loop but I cannot seem to get it to work ...
check_win.addEventListener(MouseEvent.CLICK, f_check_win);
function f_check_win(event:Event):void{
for(index = 0; index < matches[index]; index++ ){
trace(index);
for(index2 = 0; index2 < input_array.length; index2++){
if (match[index2] == input_array[index2]){
choose_change = choose_change+1;
}
}
}
So basically within this code check_win is a button. Once the button is clicked it runs the loop. It is meant to take an instance of matches which contains 6 properties and loop until index is greater than matches. According to my output this is happening but the second loop doesn't appear to do anything. Any help is greatly appreciated.
Based on the code you've provided, it looks like your inner loop should look more like this:
for(index2 = 0; index2 < input_array.length; index2++){
if (matches[index] == input_array[index2]){
choose_change = choose_change+1;
}
}
Actually I've parsed a website using htmlparser and I would like to find a specific value inside the parsed object, for example, a string "$199", and keep tracking that element(by periodic parsing) to see the value is still "$199" or has changed.
And after some painful stupid searching using my eyes, I found the that string is located at somewhere like this:
price = handler.dom[3].children[3].children[3].children[5].children[1].
children[3].children[3].children[5].children[0].children[0].raw;
So I'd like to know whether there are methods which are less painful? Thanks!
A tree based recursive search would probably be easiest to get the node you're interested in.
I've not used htmlparser and the documentation seems a little thin, so this is just an example to get you started and is not tested:
function getElement(el,val) {
if (el.children && el.children.length > 0) {
for (var i = 0, l = el.children.length; i<l; i++) {
var r = getElement(el.children[i],val);
if (r) return r;
}
} else {
if (el.raw == val) {
return el;
}
}
return null;
}
Call getElement(handler.dom[3],'$199') and it'll go through all the children recursively until it finds an element without an children and then compares it's raw value with '$199'. Note this is a straight comparison, you might want to swap this for a regexp or similar?
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