I added a statement to my current ts file with :
methodDeclaration.addStatements('let xxx; let yyy;');
But I need to remove it afterwards.
I checked and see that there's a methodDeclaration.removeStatements for doing this, indeed this needs the index or location of the statement to remove it, but I need a way to remove every instance of it .
Is there a way in Ts-morph or TS compiler api to remove every statement like I mentioned in above?
Thanks.
I tried the methodDeclaration.removeStatements few weeks back and I remember that it was not working for me. The statement did not removed as expected .
Related
in my code I was always doing
for(i in vector)...
and it always worked, but the problem is that it somehow changed and now my for shows all the values but also the properties, like "remove" that is a function, and it is breaking my whole code.
I don't know why it suddenly changed, because I didn't do anything and I'm getting crazy with this already.
Do you guys know what is happening with my application?
Another thing is that the code only get this problem on my computer.
If I clone my repository again and try it works for while but then starts the problem again.
Thank you.
The in operator has always had this behaviour. Just check that the property exists directly on the object instead of on the prototype:
for (var i in vector) {
if (vector.hasOwnProperty(i)) {
// Property exists on object
}
}
That should solve your issues.
Tom
I have been trying for getting an id from localStorage but unable to achieve it.
My localStorage inside events contains such as below.
[{"id":"ef5","title":"wan","start":"2016-05-12","end":"2016-05-13"},{"id":"ef6","title":"wana","start":"2016-05-21","end":"2016-05-22"},{"id":"ef7","title":"haha","start":"2016-05-25","end":"2016-05-26"},{"id":"ef8","title":"asdas","start":"2016-05-20","end":"2016-05-21"},{"id":"ef9","title":"sdas","start":"2016-05-19","end":"2016-05-20"}]
Now i will provide 2 coding with different method that i have tried so far. For information, i look through into this topic: localstorage: Get specific localstorage value of which contains many items
but none works for me.
I did tried coding as below:
1st method:
$("#deleteEventYes").click(function(){
var indexDel = localStorage.getItem("events");
var deleteId = calEvent.id;
var result = localStorage.getItem("events");
function getItemHrefById(json, itemId){
return $(json).filter(function(){return this.id == itemId;})[0].href;
}
var href = getItemHrefById(result, deleteId);
alert(href); });
Above code show some kind of array method (i think) where i'm using indexDel to get item from localStorage (events) while deleteId i took from calEvent.id which is the id for the event that has been clicked for to be deleted. Other than that, i think you guys know what it is. However for this method, i use result variable instead of indexDel. Thus don't mind if i getItem from localStorage 2 times
2nd method:
for (var i = 0 ; i < indexDel.length ; i += 1) {
if(deleteId == indexDel[i].id) {
return indexDel[i];
console.log(deleteId);
console.log(indexDel[i]);
}
}
return null;
Above code is using custom loop i think. The declaration of variable for indexDel is still the same with first method. I try to use the refactoring method but it seems its hard for me to understand how is it to be done. Is it because my variable placement is wrong? or is it because it is not suitable for my case?
NOTE: I want to delete an event inside eventClick function, and so far i did retrieve the id and remove the event from the calendar based on id. However my only problem now is to match the deleted event id with the id inside my localStorage and remove the item. So far getting an id from the is quite complicated for me.
UPDATED
I already done something like this but still don't work. Anyone can tell me what went wrong here? It is not giving me any error but it just do nothing. Not even delete.
https://jsfiddle.net/v35a2o07/3/
Never mind. I think i figure it out :)
It is because i forgot to setItem & stringify it after using splice.
Here i can assume splice is the same as add/remove such wrote at w3school
http://www.w3schools.com/jsref/jsref_splice.asp
"The splice() method adds/removes items to/from an array, and returns the removed item(s)."
My final code is on this fiddle given: https://jsfiddle.net/v35a2o07/4/
So the concept is:
1) First step is declare one variable that parse your localStorage key such asvar items = JSON.parse(localStorage["events"]); so that you can use it for the loop
2) Use for loop to determine the length of localStorage based on localStorage key that we parse on No. 1
3) Use if statement to check the comparison between localStorage data with our desire data such as if(items[i].id == deleteId){
4) This is OPTIONAL but important. To enable you to check the comparison is right, create one alert or console.log() and stringify it because if you don't, you will only see [object,object]. The coding such as alert(JSON.stringify(items[i])+"<<<>>>"+deleteId); Make some else statement too if you want to be sure.
5) When all the conditions are correct, then you are ready to do some action to it. For my case, i just use splice() to delete it. It is also can be used to add item. I am not sure how is it done but try to search for it to get more info.
6) After splicing it, it is safely to break and get out from the loop.
7) This is important otherwise, it will not work. Don't forget to set it back to localStorage and stringify it such as localStorage.setItem('events', JSON.stringify(items));
That's it.
I wish this would help anyone that needs it. If i have make wrong statement or wrong concept, please make correction and clarify it for anyone.
Cheers.
Why is this always returning false when it shouldn't be? How do I get it to behave?
var originalDiv = $(clickedButton).parent();
alert($(originalDiv).hasClass('.question_box_expanded'));
Remove the . before your class name. That's used for selectors only.
In order to debug this yourself, set a break point on that line. Then, step into the jQuery calls and look at what is happening. Somewhere along the way, it'd become obvious that the . was causing the issue.
Firstoff I'd like to add I've been learning javascript for like only 2 days now. I'm pretty much way ahead of myself with what I'm trying to get but here goes.
I have a json array from which I get data to replace/insert in my page. The first problem I have is that if it comes across an empty ('null') key it will just stop. Will not even try to continu.
document.getElementById("id1")src=json.img1.link;
document.getElementById("id2")src=json.img2.link;
document.getElementById("id3")src=json.img3.link;
json.img2.link is empty ('null' response from json.). javascript will then not replace "id2" but it also won't replace "id3".
I'm now trying to find a solution where it will if nothing else at least set a default.
The script is not continuing executing because it comes to an error --trying to access property link of an undefined object
Try
document.getElementById('id2').src = json.img2 ? json.img2.link : 'defaultLink';
This way your are checking for undefined (ie null) object in img2 and assigning the default value. This assumes that what is not defined (null) is the img2 object.
Actually I don't think your code should work at all, you are missing the. before the src So, try
document.getElementById("id1").src=json.img1.link;
document.getElementById("id2").src=json.img2.link;
document.getElementById("id3").src=json.img3.link;
and let us know if that doesn't solve the problem.
Btw, +points for learning JavaScript and not just straight into jQuery!
if (1) {
google_conversion_value = 1;
}
What is the meaning of the above statement? I mean, this looks like it will always execute so why bother with the if statement?
updated: one reason might be remnants of scripting on the server side. Any other ideas?
updated2: could as easily change the value of the assignment without bothering with the if statement, no?
There are two likely explanations:
It's a leftover from debugging.
The file containing this code is generated dynamically and the original sourcecode contains something like if(<?php echo $some_stuff_enabled; ?>)
However, in the latter case it would have been cleaner to output that code block only if the condition is met - but maybe it's used in some crappy template engine that just allows replacements but no conditionals...
I've seen this before, and I've always assumed it was a remnant of some old condition that was no longer needed, but never removed. I can't see any actual reason to do something like that otherwise.
Potentially because the person writing the code wanted an easy way to turn it off and on again, this is especially useful if there is a lot of code inside the block (not the case here).
Another possibility is that the original programmer couldn't be bothered writing the logic or, more likely, it hadn't been specified so the "if" was left as a placeholder.
More than likely left in from a debug release or something similar. You're right, it will always execute. It could also have been done like this so that it can be easily enabled / disabled by setting the if to 0. Perhaps the developer intended to use it as a flag somewhere else in the code?
actually, this happens when the "if" condition is driven from server, so instead of doing the right thing and not produce the script when the condition is false, they do something like this:
if (<% if (my_server_condition) then Response.Write("1") else Response.Write("0") %>){
// code goes here
}
Perhaps the if statement used to check for a legitimate conditional, and then someone replaced it with a truthy value for testing/debugging/etc.
You're right, it will always execute because 1 is truthy. I would go through your source control history and investigate that line to see if it used to contain a real conditional. If the conditional was always 1, then it's likely a debugging statement. Otherwise someone might have meant for it to be a temporary change, and may not have meant to check that in (which could be bad).
I'm not sure where this code is from, but as you indicated it will always execute. As for why you'd do this, there are times where you want to see what the result of branch code would be, without having to setup an environment. In this case you can comment out the actual value and replace it with if(1) instead for testing:
// if( ... some hard to achieve condition )
if (1) {
// Now you can see what happens if this value is set quickly
google_conversion_value = 1;
}
Of course the problem with this is that it's sometimes easy to forget to remove the if(1) and uncomment the proper condition.
This is actually the javascript recommended by Google on http://support.google.com/adwords/bin/answer.py?hl=en&answer=1722054#nocomments (click on Step 2 for the sample HTML)