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Easy way to concatenate two byte arrays
What is the easy way to concatenate two byte arrays?
12 Answers
12
...
Default value in Go's method
...s
// Both parameters are optional, use empty string for default value
func Concat1(a string, b int) string {
if a == "" {
a = "default-a"
}
if b == 0 {
b = 5
}
return fmt.Sprintf("%s%d", a, b)
}
**Option 2:** A single optional parameter at the end
// a is required, b is optional...
How do I modify fields inside the new PostgreSQL JSON datatype?
... required to manipulate json values).
Merging 2 (or more) JSON objects (or concatenating arrays):
SELECT jsonb '{"a":1}' || jsonb '{"b":2}', -- will yield jsonb '{"a":1,"b":2}'
jsonb '["a",1]' || jsonb '["b",2]' -- will yield jsonb '["a",1,"b",2]'
So, setting a simple key can be done using:...
Most efficient way to concatenate strings in JavaScript?
... every browser.
For building strings in the DOM, it seems to be better to concatenate the string first and then add to the DOM, rather then iteratively add it to the dom. You should benchmark your own case though.
(Thanks @zAlbee for correction)
...
Getting DOM elements by classname
...he above selector is compiled to the following xpath (untested):
[contains(concat(' ', normalize-space(@class), ' '), ' my-class ')]
So the PHP would be:
$dom = new DomDocument();
$dom->load($filePath);
$finder = new DomXPath($dom);
$classname="my-class";
$nodes = $finder->query("//*[contains(...
Change auto increment starting number?
... DECLARE _stmt VARCHAR(1024);
SET @inc := 0;
SET @MAX_SQL := CONCAT('SELECT IFNULL(MAX(`id`), 0) + 1 INTO @inc FROM ', _table);
PREPARE _max_stmt FROM @MAX_SQL;
EXECUTE _max_stmt;
DEALLOCATE PREPARE _max_stmt;
SET @SQL := CONCAT('ALTER TABLE ', _table, ' AUTO_INCREMENT...
How to install grunt and how to build script with it
...ou may need in your build process. Just for sake of this sample I will add Concat module for combining files together:
npm install grunt-contrib-concat --save-dev
Now you need to setup your Gruntfile.js which will describe your build process. For this sample I just combine two JS files file1.js an...
Is String.Format as efficient as StringBuilder
...id some benchmarking:
http://jdixon.dotnetdevelopersjournal.com/string_concatenation_stringbuilder_and_stringformat.htm
Updated:
Sadly the link above has since died. However there's still a copy on the Way Back Machine:
http://web.archive.org/web/20090417100252/http://jdixon.dotnetdevelop...
Calendar Recurring/Repeating Events - Best Storage Method
... EM1.`event_id` = EV.`id`
RIGHT JOIN `events_meta` EM2 ON EM2.`meta_key` = CONCAT( 'repeat_interval_', EM1.`id` )
WHERE EM1.meta_key = 'repeat_start'
AND (
( CASE ( 1299132000 - EM1.`meta_value` )
WHEN 0
THEN 1
ELSE ( 1299132000 - EM1.`meta_value` )
...
How do you debug MySQL stored procedures?
..._msg(enabled INTEGER, msg VARCHAR(255))
BEGIN
IF enabled THEN
select concat('** ', msg) AS '** DEBUG:';
END IF;
END $$
CREATE PROCEDURE test_procedure(arg1 INTEGER, arg2 INTEGER)
BEGIN
SET @enabled = TRUE;
call debug_msg(@enabled, 'my first debug message');
call debug_msg(@enabled, (...