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Split value from one field to two
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Unfortunately MySQL does not feature a split string function. However you can create a user defined function for this, such as the one described in the following article:
MySQL Split String Function by Federico Cargnelutti
With that fu...
Sign APK without putting keystore info in build.gradle
...pretty simple.
Create a keystore.properties file (in this example, in the root directory of your project next to settings.gradle, though you can put it wherever you like:
storePassword=...
keyPassword=...
keyAlias=...
storeFile=...
Add this to your build.gradle:
allprojects {
afterEvaluate ...
The performance impact of using instanceof in Java
...all efficiencies, say about 97% of the time: premature optimization is the root of all evil." The performance of instanceof probably won't be an issue, so don't waste your time coming up with exotic workarounds until you're sure that's the problem.
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How to set the prototype of a JavaScript object that has already been instantiated?
...through the [[prototype]] chain until it finds a match, or fail, after the root Object prototype. This is how Javascript allows for runtime building and modification of objects; it has a plan for searching for what it needs.
The __proto__ property exists in some implementations (a lot now): any Moz...
How can I get the root domain URI in ASP.NET?
Let's say I'm hosting a website at http://www.foobar.com .
14 Answers
14
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Make .git directory web inaccessible
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Put this in an .htaccess file at the root of your web server:
RedirectMatch 404 /\.git
This solution is robust and secure: it
works for all .git directories in your site, even if there are more than one,
also hides other Git files like .gitignore and .gitmo...
How to reference the initial commit?
...tional problem with your question: there can exist more than one such TAIL root commit (parentless commit) in a repository (even if we discount disconnected branches, such as 'html', 'man' and 'todo' in git.git repository). This is usually result of joining separate projects in one, or using subtree...
insert a NOT NULL column to an existing table
...crosoft SQL server. If you want to perform the same operation on Oracle or MySQL you need to use semicolon ; like that:
ALTER TABLE MY_TABLE ADD STAGE INT NULL;
UPDATE MY_TABLE SET <a valid not null values for your column>;
ALTER TABLE MY_TABLE ALTER COLUMN STAGE INT NOT NULL;
...
node.js global variables?
...vCounters: [Function],
binding: [Function] },
GLOBAL: [Circular],
root: [Circular],
Buffer:
{ [Function: Buffer]
poolSize: 8192,
isBuffer: [Function: isBuffer],
byteLength: [Function],
_charsWritten: 8 },
setTimeout: [Function],
setInterval: [Function],
clear...
What is the point of interfaces in PHP?
...ce IPersonService
{
public function Create($personObject);
}
class MySqlPerson implements IPersonService
{
public function Create($personObject)
{
// Create a new person in MySql database.
}
}
class MongoPerson implements IPersonService
{
public function Create($pers...