<commit_before># concat

#### signature: `concat(observables: ...*): Observable`

## Subscribe to observables in order as previous completes, emit values.

---

:bulb: You can think of concat like a line at a ATM, the next transaction
(subscription) cannot start until the previous completes!

:bulb: This operator can be used as either a static or instance method!

:bulb: If throughput, not order, is not a primary concern, try [merge](merge.md)
instead!

---

<div class="ua-ad"><a href="https://ultimateangular.com/?ref=76683_kee7y7vk"><img src="https://ultimateangular.com/assets/img/banners/ua-leader.svg"></a></div>

### Examples

(
[example tests](https://github.com/btroncone/learn-rxjs/blob/master/operators/specs/combination/concat-spec.ts)
)<commit_msg>Minor note correction (#89)<commit_after># concat

#### signature: `concat(observables: ...*): Observable`

## Subscribe to observables in order as previous completes, emit values.

---

:bulb: You can think of concat like a line at a ATM, the next transaction
(subscription) cannot start until the previous completes!

:bulb: This operator can be used as either a static or instance method!

:bulb: If throughput, not order, is a primary concern, try [merge](merge.md)
instead!

---

<div class="ua-ad"><a href="https://ultimateangular.com/?ref=76683_kee7y7vk"><img src="https://ultimateangular.com/assets/img/banners/ua-leader.svg"></a></div>

### Examples

(
[example tests](https://github.com/btroncone/learn-rxjs/blob/master/operators/specs/combination/concat-spec.ts)
)
{'fraction_non_alphanumeric': 0.1474025974025974, 'fraction_numerical': 0.01038961038961039, 'mean_word_length': 4.94980694980695, 'pattern_counts': {'":': 0, '<': 13, '<?xml version=': 0, '>': 13, 'https://': 6, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '3494387', 'n_tokens_mistral': 512, 'n_tokens_neox': 481, 'n_words': 144}