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Most efficient way to create a zero filled JavaScript array?
...rray(5) you're creating an object that kinda looks like this: { length: 5, __proto__: Array.prototype } - try console.dir( Array(5) ). Notice that it doesn't have any properties 0, 1, 2, etc. But when you apply that unto the Array constructor, it's like saying Array(undefined, undefined, undefined, ...
Can I replace groups in Java regex?
...
replace the password fields from the input:
{"_csrf":["9d90c85f-ac73-4b15-ad08-ebaa3fa4a005"],"originPassword":["uaas"],"newPassword":["uaas"],"confirmPassword":["uaas"]}
private static final Pattern PATTERN = Pattern.compile(".*?password.*?\":\\[\"(.*?)\"\\](,\"|}$...
How to set up Spark on Windows?
.../docs/latest/building-spark.html
Download and install Maven, and set MAVEN_OPTS to the value specified in the guide.
But if you're just playing around with Spark, and don't actually need it to run on Windows for any other reason that your own machine is running Windows, I'd strongly suggest you in...
How to add text inside the doughnut chart using Chart.js?
...rt is refreshed by providing new data params
– techie_28
Jun 29 '16 at 9:19
Have you figured out the solution for that...
Animate change of view controllers without using navigation controller stack, subviews or modal cont
...iewController{
[self addChildViewController:aNewViewController];
__weak __block ViewController *weakSelf=self;
[self transitionFromViewController:self.currentViewController
toViewController:aNewViewController
duration:1.0
...
How to get the sizes of the tables of a MySQL database?
...e (although you need to substitute the variables first):
SELECT
table_name AS `Table`,
round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB`
FROM information_schema.TABLES
WHERE table_schema = "$DB_NAME"
AND table_name = "$TABLE_NAME";
or this query to list the size ...
What is the difference between an interface and abstract class?
...s a mix between conventions and special methods that call descriptors (the __method__ methods).
As usual with programming, there is theory, practice, and practice in another language :-)
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im...
Send email with PHPMailer - embed image in body
...
I found the answer:
$mail->AddEmbeddedImage('img/2u_cs_mini.jpg', 'logo_2u');
and on the <img> tag put src='cid:logo_2u'
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...
Profiling Vim startup time
....g.:
vim -V 2>&1 | perl -MTime::HiRes=time -ne 'print time, ": ", $_' | tee vilog
You might have to blindly type :q to get back to your prompt. Afterwards, you should find the file vilog in your current directory with hires timestamps at the beginning of each line.
If you can do with a gr...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...se 4-byte UTF8 with Connector/J configure the MySQL server with
character_set_server=utf8mb4. Connector/J will then use that setting
as long as characterEncoding has not been set in the connection
string. This is equivalent to autodetection of the character set.
Adjust your columns and datab...