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The simplest way to comma-delimit a list?
...
Java 8 and later
Using StringJoiner class :
StringJoiner joiner = new StringJoiner(",");
for (Item item : list) {
joiner.add(item.toString());
}
return joiner.toString();
Using Stream, and Collectors:
return list.stream().
map(Object...
How do you reverse a string in place in JavaScript?
How do you reverse a string in place (or in-place) in JavaScript when it is passed to a function with a return statement, without using built-in functions ( .reverse() , .charAt() etc.)?
...
PHP global in functions
...of external code on which it depends? It can not function without a lot of extras. Using the Zend framework, have you ever changed the implementation of an interface? An interface is in fact a global.
Another globally used application is Drupal. They are very concerned about proper design, but just...
Swift Beta performance: sorting arrays
...sing namespace std;
using namespace std::chrono;
int main(int argc, const char * argv[]) {
const auto arraySize = 10000000;
vector<uint32_t> randomNumbers;
for (int i = 0; i < arraySize; ++i) {
randomNumbers.emplace_back(arc4random_uniform(arraySize));
}
const...
Using str_replace so that it only acts on the first match?
...] - The maximum possible
replacements for each pattern in each
subject string. Defaults to -1 (no
limit).
Though, see zombat's answer for a more efficient method (roughly, 3-4x faster).
share
|
...
How are Python's Built In Dictionaries Implemented?
... ...
For a 64 bit machine, this could save up to 16 bytes per key per extra dictionary.
Shared Keys for Custom Objects & Alternatives
These shared-key dicts are intended to be used for custom objects' __dict__. To get this behavior, I believe you need to finish populating your __dict__ be...
SQL keys, MUL vs PRI vs UNI
...------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| foo | int(11) | YES | | NULL | |
+-------+---------+------+-----+---------+-------+
1 row in set (0.00 sec)
A table with one column and an index o...
Select SQL Server database size
...13.04 MB
Function:
ALTER FUNCTION [dbo].[GetDBSize]
(
@db_name NVARCHAR(100)
)
RETURNS TABLE
AS
RETURN
SELECT
database_name = DB_NAME(database_id)
, log_size_mb = CAST(SUM(CASE WHEN type_desc = 'LOG' THEN size END) * 8. / 1024 AS DECIMAL(8,2))
, row_size_mb = CAST(SUM...
ASP.NET MVC RequireHttps in Production Only
...cal machine with a self-signed certificate is that I have to go through an extra step of deployment to test changes. I think that if you are testing something related to security than it makes sense, but say if you are just checking some other minor change, it is a pain to have to deploy just to get...
How to fix “Incorrect string value” errors?
...r noticing an application tended to discard random emails due to incorrect string value errors, I went though and switched many text columns to use the utf8 column charset and the default column collate ( utf8_general_ci ) so that it would accept them. This fixed most of the errors, and made the ...