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Unexpected results when working with very big integers on interpreted languages
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Here is the answer in C, for completeness:
#include <stdio.h>
int main(void)
{
unsigned long long sum = 0, i;
for (i = 0; i <= 1000000000; i++) //one billion
sum += i;
printf("%llu\n", sum); //500000000500000000
return 0;
}
Th...
Format LocalDateTime with Timezone in Java8
...this is either OffsetDateTime (which contains an offset but not a timezone including DST-rules) or ZonedDateTime. You can watch out all supported fields of such a type by look-up on the method isSupported(TemporalField).. The field OffsetSeconds is supported in OffsetDateTime and ZonedDateTime, but ...
Validating IPv4 addresses with regexp
... in case anybody else is looking for validating 'Internet IP addresses not including the common private addresses'
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vs. . Which to use?
When looking at most sites (including SO), most of them use:
15 Answers
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Practical uses of git reset --soft?
... new commits that are more useful for reviewers. I'd say that soft resets (including plain git reset) are good when you (a) want to rewrite history, (b) don't care about the old commits (so you can avoid the fussiness of interactive rebase), and (c) have more than one commit to change (otherwise, co...
How to check if a Constraint exists in Sql server?
...Key constraints or Primary Key constraints, etc. For best results, always include the appropriate object type as the second parameter for the OBJECT_ID function:
Constraint Object Types:
C = CHECK constraint
D = DEFAULT (constraint or stand-alone)
F = FOREIGN KEY constraint
PK = PRIMARY KEY cons...
How do BitTorrent magnet links work?
...t. The "infohash" is the hash of the encoded info data.
Some magnet links include trackers or web seeds, but they often don't. Your client may know nothing about the torrent except for its infohash. The first thing it needs to is find other peers who are downloading the torrent. It does this using ...
When do I need to use a semicolon vs a slash in Oracle SQL?
...eed forward slash as they will run automatically at the end of semicolons, including DDL, DML, DCL and TCL statements.
For other PL/SQL blocks, including Procedures, Functions, Packages and Triggers, because they are multiple line programs, Oracle need a way to know when to run the block, so we ha...
Remove Identity from a column in a table
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