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How does the Java 'for each' loop work?
...or the same thing. Therefore, when reading each element, one by one and in order, a foreach should always be chosen over an iterator, as it is more convenient and concise.
foreach
for(int i : intList) {
System.out.println("An element in the list: " + i);
}
Iterator
Iterator<Integer> in...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
...en home. Reason being GROUP BY will fetch any random row for each home and ORDER BY will just sort the overall all result as produced by GROUP BY
– sactiw
Nov 26 '15 at 12:11
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Using helpers in model: how do I include helper dependencies?
...
To access helpers from your own controllers, just use:
OrdersController.helpers.order_number(@order)
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What is the relationship between Looper, Handler and MessageQueue in Android?
... Also note that a thread can't be associated with more than one Looper. In order to guarantee this association, Looper is stored in thread-local storage, and it can't be created via its constructor directly. The only way to create it is to call prepare static method on Looper. prepare method first e...
Homebrew’s `git` not using completion
...ofile to get homebrew's bash-completion working:
if [ -f $(brew --prefix)/etc/bash_completion ]; then
. $(brew --prefix)/etc/bash_completion
fi
The above is mentioned in the caveats when you install the bash-completion formula.
Note: if you are using Bash v4 or later (via brew install bash...
Failed to Attach to Process ID Xcode
... cannot resolve localhost: Unknown host something is screwed up with your /etc/hosts file, go to Step 2
Step2: Check /etc/hosts
Check that the top of your /etc/hosts file looks like this
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
If ...
What is cURL in PHP?
...bout it (and most other extensions) can be found in the PHP manual.
In order to use PHP's cURL functions
you need to install the » libcurl
package. PHP requires that you use
libcurl 7.0.2-beta or higher. In PHP
4.2.3, you will need libcurl version 7.9.0 or higher. From PHP 4.3.0, you wi...
Remove duplicate rows in MySQL
...owing columns:
employee (id, first_name, last_name, start_date, ssn)
In order to delete the rows with a duplicate ssn column, and keeping only the first entry found, the following process can be followed:
-- create a new tmp_eployee table
CREATE TABLE tmp_employee LIKE employee;
-- add a unique...
How to make node.js require absolute? (instead of relative)
...uch as require('xyz') from /beep/boop/foo.js, node searches these paths in order, stopping at the first match and raising an error if nothing is found:
/beep/boop/node_modules/xyz
/beep/node_modules/xyz
/node_modules/xyz
For each xyz directory that exists, node will first look for a xyz/package.j...
What is the difference between trie and radix trie data structures?
...0110 1110 0110 0111 ...
Let us consider that the nodes are added in the order they are presented above. smile_item is the root of this tree. The difference, bolded to make it slightly easier to spot, is in the last byte of "smile", at bit 36. Up until this point, all of our nodes have the same pr...