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Why are preprocessor macros evil and what are the alternatives?
...ent, no matter if it's one statement or a hundred. Makes it hard to figure out what is going on.
Replacement: Use functions - inline if it needs to be "fast" (but beware that too much inline is not a good thing)
2) Macro expansions can have strange side effects.
The famous one is #define SQUARE(...
List of tables, db schema, dump etc using the Python sqlite3 API
... FROM sqlite_master WHERE type='table';")
print(cursor.fetchall())
Watch out for my other answer. There is a much faster way using pandas.
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Setting the zoom level for a MKMapView
...
Thanks! Yes you are right, I actually took the code out from my project where it was a function rather than an addition to MKMapView. I have just edited to code to reflect your correction.
– quentinadam
Feb 28 '13 at 15:36
...
Most efficient way to determine if a Lua table is empty (contains no entries)?
...block, it will use that, then climb up to the next block, and repeat. Once out of locals, it will only then use the Global Namespace. This is a dumbed down version of it, but in the end, it definitely means the difference in regards to program speed.
– ATaco
No...
How can I write to the console in PHP?
...w panel to provide useful debugging and profiling information. It provides out of the box support for Laravel 4 and Slim 2 and support can be added via its extensible API.
Using Xdebug
A better way to debug your PHP would be via Xdebug. Most browsers provide helper extensions to help you pass the...
Exec : display stdout “live”
...exec. Use spawn which is an EventEmmiter object. Then you can listen to stdout/stderr events (spawn.stdout.on('data',callback..)) as they happen.
From NodeJS documentation:
var spawn = require('child_process').spawn,
ls = spawn('ls', ['-lh', '/usr']);
ls.stdout.on('data', function (data...
How do you print in a Go test using the “testing” package?
...ndex
fmt.X print statements do work inside tests, but you will find their output is probably not on screen where you expect to find it and, hence, why you should use the logging methods in testing.
If, as in your case, you want to see the logs for tests that are not failing, you have to provide go...
Akka or Reactor [closed]
... you imply by “distributed”). For “modular” I do not know enough about Reactor, in particular how you can look up active components and manage them.
If you start a real project now and need something which satisfies your first sentence, then I don’t think it would be controversial to reco...
Find the version of an installed npm package
...older
└── grunt@0.4.1
Alternatively, you can just run npm list without passing a package name as an argument to see the versions of all your packages:
├─┬ cli-color@0.1.6
│ └── es5-ext@0.7.1
├── coffee-script@1.3.3
├── less@1.3.0
├─┬ sentry@0.1.2
│ ├...
Check if object value exists within a Javascript array of objects and if not add a new object to arr
... what to do when you have to add a new user to this array. The easiest way out - just pushing a new element with id equal to array.length + 1:
function addUser(username) {
if (userExists(username)) {
return false;
}
arr.push({ id: arr.length + 1, username: username });
return true;
}
...