Use `a <- v` instead of `a = append(a, v)`

[xushiwei]

Proposal

In Go:

a = append(a, v)
a = append(a, v1, v2, v3)
a = append(a, b...)

In Go+:

a <- v
a <- v1, v2, v3
a <- b...

Easier to understand.

[akofer]

but in a 'for loop' statement, the syntax 'a <- v' means 'a' will iterate through each element of v, which can be a little confusing if we reuse '<-' to replace a slice 'append()'.

proposal: it might be better to use 'for a in v' instead of 'for a <- v'.

[xushiwei]

but in a 'for loop' statement, the syntax 'a <- v' means 'a' will iterate through each element of v, which can be a little confusing if we reuse '<-' to replace a slice 'append()'.

proposal: it might be better to use 'for a in v' instead of 'for a <- v'.

Related issue: https://github.com/goplus/gop/issues/295 (reopened)

[xushiwei]

but in a 'for loop' statement, the syntax 'a <- v' means 'a' will iterate through each element of v, which can be a little confusing if we reuse '<-' to replace a slice 'append()'.

proposal: it might be better to use 'for a in v' instead of 'for a <- v'.

supported in https://github.com/goplus/gop/pull/2166

[xushiwei]

@niupilot Please add related documentation to the quick start.

[niupilot[bot]]

Task Completed ✅

I've successfully added documentation for the <- append operator to the quick start guide.

What was done:

• Added a new subsection "Appending to slices" in the Slices section of doc/docs.md
• Documented all three forms of the <- append operator with examples:
  • a <- v - append single element
  • a <- v1, v2, v3 - append multiple elements
  • a <- b... - append another slice
• Included comparison with Go's append() function for clarity

Pull Request

Created PR #2459: https://github.com/goplus/xgo/pull/2459

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Branch: codeagent/claude/issue-2107-1760151315
Job Run: https://github.com/goplus/xgo/actions/runs/1