Share your favorite code snippet by grider123

View this thread on: hive.blog | peakd.com | ecency.com

programming · @grider123 · Jun 10 '17

Share your favorite code snippet

I'm interested in your favorite code snippet. It can be in any language.
Please share it in the comments below.

Mine is a way to swap to variables without using a temporary variable:

var a  = 5;
var b = 3;
var a = b + a;
var b = a - b;
var a = a - b;

After that a is equal to 3 and b is equal to 5. We have swapped the variables without using a third variable.

👍 javifo, bedroomshaman, grider123

`author`	grider123
`permlink`	share-your-favorite-code-snippet
`category`	programming
`json_metadata`	{"tags":["programming","code","snippet","share"],"app":"steemit/0.1","format":"markdown"}
`created`	2017-06-10 11:18:06
`last_update`	2017-06-10 11:18:06
`depth`	0
`children`	4
`last_payout`	2017-06-17 11:18:06
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	363
`author_reputation`	107,965,352,035,530
`root_title`	"Share your favorite code snippet"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	4,525,544
`net_rshares`	1,002,495,818
`author_curate_reward`	""

properties (23)vote details (3)

voter	rshares	pct
bedroomshaman	195,301,393	10%
grider123	50,764,697	100%
javifo	756,429,728	100%

@adnanrahic · Jun 10 '17

```var port = process.env.PORT || 8000```
It's just so fancy using the pipes to set a default value when the initial value is undefined.

👍 grider123

`author`	adnanrahic
`permlink`	re-grider123-share-your-favorite-code-snippet-20170610t221941713z
`category`	programming
`json_metadata`	{"tags":["programming"],"app":"steemit/0.1"}
`created`	2017-06-10 22:19:42
`last_update`	2017-06-10 22:19:42
`depth`	1
`children`	1
`last_payout`	2017-06-17 22:19:42
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	136
`author_reputation`	1,605,311,705,685
`root_title`	"Share your favorite code snippet"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	4,557,725
`net_rshares`	75,557,058
`author_curate_reward`	""

properties (23)vote details (1)

voter	weight	wgt%	rshares	pct	time
grider123	0 B		75,557,058	100%

@grider123 · Jun 11 '17

Good example! Ty

properties (22)

`author`	grider123
`permlink`	re-adnanrahic-re-grider123-share-your-favorite-code-snippet-20170611t105642208z
`category`	programming
`json_metadata`	{"tags":["programming"],"app":"steemit/0.1"}
`created`	2017-06-11 10:56:45
`last_update`	2017-06-11 10:56:45
`depth`	2
`children`	0
`last_payout`	2017-06-18 10:56:45
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	16
`author_reputation`	107,965,352,035,530
`root_title`	"Share your favorite code snippet"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	4,585,806
`net_rshares`	0

@xerdo · Jun 12 '17

Alternate way of swapping two vars without using a third:

```
a ^= b;
b ^= a;
a ^= b;
```

I'm also a fan of Java 8 streams:

```
public class MyObj {
    int someValue;
    // ...
}

List<MyObj> someList; // already defined

someList.stream()
  .map(myObj -> myObj.someValue)
  .filter(value -> value > 0)
  .findFirst().orElse(null);
```

👍 grider123

`author`	xerdo
`permlink`	re-grider123-share-your-favorite-code-snippet-20170612t085328298z
`category`	programming
`json_metadata`	{"tags":["programming"],"app":"steemit/0.1"}
`created`	2017-06-12 08:53:27
`last_update`	2017-06-12 08:53:27
`depth`	1
`children`	1
`last_payout`	2017-06-19 08:53:27
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	340
`author_reputation`	82,257,647,130
`root_title`	"Share your favorite code snippet"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	4,646,338
`net_rshares`	152,228,300
`author_curate_reward`	""

properties (23)vote details (1)

voter	weight	wgt%	rshares	pct	time
grider123	0 B		152,228,300	100%

@grider123 · Jun 12 '17

Cool XOR swap. Didn't know this trick! Really neat.

properties (22)