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Want to find records with no associated records in Rails
...ager loading table(s) Currently, Active Record recognizes the table in the string, and knows to JOIN the comments table to the query, rather than loading comments in a separate query. However, doing this without writing a full-blown SQL parser is inherently flawed. Since we don't want to write an SQ...
Putting license in each code file? [closed]
...not allowed to use it at all. So as the publisher, you don't have to go to extra lengths to make people read the license.
– Michael Borgwardt
May 10 '09 at 21:59
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How do you create a remote Git branch?
...n do gitb feature/abcd - this sets it up for git pull and git push without extra arguments + pushes the new branch into the remote repo to verify that the name is really free.
– youurayy
Jun 9 at 20:35
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Does JavaScript guarantee object property order?
...imply put, the iteration order is a combination of the insertion order for strings keys, and ascending order for number-like keys:
// key order: 1, foo, bar
const obj = { "foo": "foo", "1": "1", "bar": "bar" }
Using an array or a Map object can be a better way to achieve this. Map shares some simil...
Why do we need tuples in Python (or any immutable data type)?
...mutable objects can allow substantial optimization; this is presumably why strings are also immutable in Java, developed quite separately but about the same time as Python, and just about everything is immutable in truly-functional languages.
in Python in particular, only immutables can be hashable ...
Resizing an iframe based on content
...frame(height);
}
// Helper function, parse param from request string
function getParam( name )
{
name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regexS = "[\\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var r...
When to use PNG or JPG in iPhone development?
...
PNG's are pixel perfect (non-lossy), and require very little extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression l...
Hash function that produces short hashes?
Is there a way of encryption that can take a string of any length and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
...
Must qualify the allocation with an enclosing instance of type GeoLocation
...E GeoLocation.java
public class GeoLocation {
public static void main(String[] args) throws InterruptedException {
int size = 10;
// create thread pool with given size
ExecutorService service = Executors.newFixedThreadPool(size);
// queue some tasks
f...
App store link for “rate/review this app”
...#define YOUR_APP_STORE_ID 545174222 //Change this one to your ID
static NSString *const iOS7AppStoreURLFormat = @"itms-apps://itunes.apple.com/app/id%d";
static NSString *const iOSAppStoreURLFormat = @"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Softwa...