del has Javascript behaviour when used on a list item

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#682 4 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript, python
Domain
compilers

Research direction

Start by reproducing the Python example and inspect the compiler path that translates del applied to a list item. Compare the generated JavaScript with Python's length-2 behavior; done means list-item deletion has equivalent behavior rather than JavaScript delete semantics.

Written by the indexing model from the issue text.

Description

IS: enhancement STATE: under consideration

The Python del results in the Javascript delete, which doesn't have the same behaviour on a list item as in Python. try:

t = [1,2,3]
del(t[0])
print(len(t))

In Python you get length 2, and in Javascript length 3. Javascript's t.splice(0,1) could solve the problem.

Dominant language
Python
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