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How to find out the MySQL root password
...sword.
On ubuntu I did the following:
sudo service mysql stop
sudo mysqld_safe --skip-grant-tables --skip-syslog --skip-networking
Then run mysql in a new terminal:
mysql -u root
And run the following queries to change the password:
UPDATE mysql.user SET authentication_string=PASSWORD('passw...
NSString property: copy or retain?
...not, then it just gets retained. Exactly the semantics that you want in an app (let the type do what's best).
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USB Debugging option greyed out
...Software Information”
Tap “Build number” five times.
A pop-up will appear saying “You are now a developer”. Your’re not done yet.
Go back to your phone’s home page by pushing the home button.
Go to “Settings”.
Go to “Developer options”
Click the “USB debugging- Turn on debu...
Argparse: Way to include default values in '--help'?
...parser = argparse.ArgumentParser(
# ... other options ...
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
To quote the documentation:
The other formatter class available, ArgumentDefaultsHelpFormatter, will add information about the default value of each of the arguments.
Not...
Order discrete x scale by frequency/value
...library(ggplot2)
# Automatic levels
ggplot(mtcars, aes(factor(cyl))) + geom_bar()
# Manual levels
cyl_table <- table(mtcars$cyl)
cyl_levels <- names(cyl_table)[order(cyl_table)]
mtcars$cyl2 <- factor(mtcars$cyl, levels = cyl_levels)
# Just to be clear, the above line is no different...
Maximum number of threads per process in Linux?
...p_count
echo 200000 > /proc/sys/kernel/pid_max
./100k-pthread-create-app
2018 update from @Thomas, on systemd systems:
/etc/systemd/logind.conf: UserTasksMax=100000
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Proper way to wait for one function to finish before continuing?
... work like this is to use a callback function, eg:
function firstFunction(_callback){
// do some asynchronous work
// and when the asynchronous stuff is complete
_callback();
}
function secondFunction(){
// call first function and pass in a callback function which
// first ...
jQuery.ajax handling continue responses: “success:” vs “.done”?
....ajax is now a deferred promise that can be bound to anywhere else in your application. So let's say you want to make this ajax call from a few different places. Rather than passing in your success function as an option to the function that makes this ajax call, you can just have the function return...
How Can I Download a File from EC2 [closed]
...mazon.com/gettingstarted/latest/computebasics-linux/getting-started-deploy-app-connect-linux.html
When you are able to ssh as in the above doc, you will be able to use scp to copy the file.
Another option is to bring up some Web server on your instance, configure HTTPS if your file is sensitive a...
Making code internal but available for unit testing from other projects
... testing projects. It's probably not a good choice for use in your actual application assemblies, for the reason stated above.
Example:
[assembly: InternalsVisibleTo("NameAssemblyYouWantToPermitAccess")]
namespace NameOfYourNameSpace
{
...