How to keep only a user-defined quantity of labels? - label

Question

First of all sorry for the likely dumb question but i have problems with the label.delete() function used to keep a limited number of labels on charts and deleting older ones, i used this code as reference: https://www.tradingview.com/pine-script-docs/en/v4/concepts/Text_and_shapes.html#deleting-labels
on a function used to create pivots but does not seem to work since it deletes all newer labels created without deleting the older ones, here is the code:
//#version=5
indicator(title='RSI Pivot', precision=0, max_labels_count=500)
qtyLabelsInput = input.int(20, 'Labels to keep', minval=0)
myRSI = ta.rsi(close, 20)
plot(myRSI)
drawLabel(_offset, _pivot, _style, _size, _text, _textcolor) =>
if (_pivot)
label.new(bar_index[_offset], _pivot, style=_style, size=_size, text=_text, textcolor=_textcolor)
if array.size(label.all) > qtyLabelsInput
label.delete(array.get(label.all, 0))
leftLenH = input.int(title='Pivot High main', defval=2, minval=1, inline='Pivot High main')
rightLenH = input.int(title='/', defval=2, minval=1, inline='Pivot High main')
leftLenL = input.int(title='Pivot Low main', defval=2, minval=1, inline='Pivot Low main')
rightLenL = input.int(title='/', defval=2, minval=1, inline='Pivot Low main')
ph = ta.pivothigh(myRSI, leftLenH, rightLenH)
pl = ta.pivotlow(myRSI, leftLenL, rightLenL)
//---------------------------------------------------------------------------------------------------------------MAIN label
drawLabel(rightLenH, ph, label.style_none, size.tiny , "T", color.red)
drawLabel(rightLenL, pl, label.style_none, size.tiny, "B", color.green)
EDIT CODE 2:
//#version=5
indicator(title='CMF Pivot', precision=0, max_labels_count=500)
qtyLabelsInput = input.int(20, 'Labels to keep', minval=0)
myRSI = ta.rsi(close, 20)
plot(myRSI, "RSI")
drawLabel(_offset, _pivot, _style, _size, _text, _textcolor, _y) =>
// x y y(2)=na? plot location
var label[] label_array = array.new_label(qtyLabelsInput)
if (_pivot)
array.unshift(label_array, label.new(bar_index[_offset], _pivot, style=_style, size=_size, text=_text, textcolor=_textcolor, y=_y))
label.delete(array.pop(label_array))
//cmf code
var cumVol = 0.
cumVol += nz(volume)
if barstate.islast and cumVol == 0
runtime.error("No volume is provided by the data vendor.")
length = input.int(20, minval=1)
ad = close==high and close==low or high==low ? 0 : ((2*close-low-high)/(high-low))*volume
cmf = math.sum(ad, length) / math.sum(volume, length)
//
leftLenH = input.int(title='Pivot High main', defval=2, minval=1, inline='Pivot High main')
rightLenH = input.int(title='/', defval=2, minval=1, inline='Pivot High main')
leftLenL = input.int(title='Pivot Low main', defval=2, minval=1, inline='Pivot Low main')
rightLenL = input.int(title='/', defval=2, minval=1, inline='Pivot Low main')
ph = ta.pivothigh(cmf, leftLenH, rightLenH)
pl = ta.pivotlow(cmf, leftLenL, rightLenL)
//---------------------------------------------------------------------------------------------------------------MAIN label
//drawLabel(rightLenH, ph, label.style_none, size.tiny , "T", color.red, myRSI)
//drawLabel(rightLenL, pl, label.style_none, size.tiny, "B", color.green, myRSI)
plotchar(ph, location=location.top, size = size.tiny, text = "H", textcolor = color.red, show_last=15, color=#000000)
plotchar(pl, location=location.bottom, size = size.tiny, text = "L", textcolor = color.green, show_last=15, color=#000000)

Answer 1

You can manage your labels of a fixed number by using a var label array. When your condition is met and you are adding a new label to the array, you also remove and delete the last label in order to keep a fixed number of labels.
drawLabel(_offset, _pivot, _style, _size, _text, _textcolor) =>
var label[] label_array = array.new_label(qtyLabelsInput)
if (_pivot)
array.unshift(label_array, label.new(bar_index[_offset], _pivot, style=_style, size=_size, text=_text, textcolor=_textcolor))
label.delete(array.pop(label_array))

Answer 2

Found the solution, thanks again for your help
drawLabel(_pivot, _y, _style, _size, _text, _textcolor) =>
var label[] label_array = array.new_label(qtyLabelsInput)
if _pivot
array.unshift(label_array, label.new(bar_index[_pivot], y=_y, style=_style, size=_size, text=_text, textcolor=_textcolor))
label.delete(array.pop(label_array))