popFirst - remove & return first element(s) of collection [1007610]

< > BotCompany Repo | #1007610 // popFirst - remove & return first element(s) of collection

JavaX fragment (include) [tags: use-pretranspiled]

static <A> A popFirst(L<A> l) {
  if (empty(l)) null;
  A a = first(l);
  l.remove(0);
  ret a;
}

static <A> A popFirst(Cl<A> l) {
  if (empty(l)) null;
  A a = first(l);
  l.remove(a);
  ret a;
}

static <A, B> Pair<A, B> popFirst(Map<A, B> map) {
  if (map == null) null;
  var it = map.entrySet().iterator();
  if (!it.hasNext()) null;
  var p = mapEntryToPair(it.next());
  it.remove();
  ret p;
}

static <A> L<A> popFirst(int n, L<A> l) {
  L<A> part = cloneSubList(l, 0, n);
  removeSubList(l, 0, n);
  ret part;
}

static <A> AppendableChain<A> popFirst(AppendableChain<A> a) {
  ret a?.popFirst();
}

Author comment

Began life as a copy of #1002780

Travelled to 14 computer(s): aoiabmzegqzx, bhatertpkbcr, cbybwowwnfue, cfunsshuasjs, gwrvuhgaqvyk, irmadwmeruwu, ishqpsrjomds, lpdgvwnxivlt, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tslmcundralx, tvejysmllsmz, vouqrxazstgt

Snippet ID:

#1007610

Snippet name:

popFirst - remove & return first element(s) of collection

Eternal ID of this version:

#1007610/8

Text MD5:

c46ad9d62a7a95d792ade67c1462b59f

Transpilation MD5:

24fc6ad9c15661747663a4d9c967e2c2

Author:

stefan

Category:

javax

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2021-10-11 15:07:28

Source code size:

640 bytes / 32 lines

Pitched / IR pitched:

No / No

Views / Downloads:

697 / 789

Version history:

7 change(s)

Referenced in:

[show references]

1	static <A> A popFirst(L<A> l) {
2	if (empty(l)) null;
3	A a = first(l);
4	l.remove(0);
5	ret a;
6	}
7
8	static <A> A popFirst(Cl<A> l) {
9	if (empty(l)) null;
10	A a = first(l);
11	l.remove(a);
12	ret a;
13	}
14
15	static <A, B> Pair<A, B> popFirst(Map<A, B> map) {
16	if (map == null) null;
17	var it = map.entrySet().iterator();
18	if (!it.hasNext()) null;
19	var p = mapEntryToPair(it.next());
20	it.remove();
21	ret p;
22	}
23
24	static <A> L<A> popFirst(int n, L<A> l) {
25	L<A> part = cloneSubList(l, 0, n);
26	removeSubList(l, 0, n);
27	ret part;
28	}
29
30	static <A> AppendableChain<A> popFirst(AppendableChain<A> a) {
31	ret a?.popFirst();
32	}