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Writing a compiler in its own language
...piler to another architecture of microprocessor the bootstrapping should restart from a working compiler for that architecture. Is this right? If this is right this means that is better to keep the first compiler as it could be useful to port your compiler to other architectures (especially if is wr...
Difference between matches() and find() in Java Regex
...tch the expression against the entire string and implicitly add a ^ at the start and $ at the end of your pattern, meaning it will not look for a substring. Hence the output of this code:
public static void main(String[] args) throws ParseException {
Pattern p = Pattern.compile("\\d\\d\\d");
...
How to make an Android device vibrate?
...
Grant Vibration Permission
Before you start implementing any vibration code, you have to give your application the permission to vibrate:
<uses-permission android:name="android.permission.VIBRATE"/>
Make sure to include this line in your AndroidManifest....
How to create an installer for a .net Windows Service using Visual Studio
...ing. Here's a bit of sample code from one of my services you can use as a starting point.
public static int Main(string[] args)
{
if (System.Environment.UserInteractive)
{
// we only care about the first two characters
string arg = args[0].ToLowerInvariant().Substring(0, 2)...
eclipse stuck when building workspace
...on:
mv .metadata\.plugins\org.eclipse.core.resources\.projects projects
Start and exit Eclipse, then move the .projects folder back to where it was originally:
mv projects .metadata\.plugins\org.eclipse.core.resources\.projects
Use at your own risk, of course.
...
MySQL: Transactions vs Locking Tables
...eiver, and your telephone gets repossessed.
So... enter transactions. You start a transaction, you debit your account $20, you try to credit the receiver with $20... and something blows up again. But this time, instead of exit(), the code can just do rollback, and poof, your $20 is magically added ...
How do I run Redis on Windows?
...e. I just copied c:\program files\Redis\conf\redis-dist.conf. Then I could start the service from the services control panel (or 'net start redis' from a command line)
– solublefish
May 24 '13 at 3:49
...
GroupBy pandas DataFrame and select most common value
...k, fiddle with the implementation of foo for a bit. If you're still having starting trouble, I recommend opening a new Q.
– cs95
Mar 26 '19 at 10:51
1
...
How to replace all occurrences of a character in string?
... str, const std::string& from, const std::string& to) {
size_t start_pos = 0;
while((start_pos = str.find(from, start_pos)) != std::string::npos) {
str.replace(start_pos, from.length(), to);
start_pos += to.length(); // Handles case where 'to' is a substring of 'from'...
How to use Elasticsearch with MongoDB?
...sources list.
echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
Get the 10gen package.
sudo apt-get install mongodb-10gen
Then pick your version if you don't want the most recent. If you are setting your environment up...