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Rails extending ActiveRecord::Base
...RY up your models has been in highlights.
Concerns basically allow you to group similar code of a model or across multiple models in a single module and then use this module in the models. Here is a example:
Consider a Article model, a Event model and a Comment Model. A article or A event has many...
Why are regular expressions so controversial? [closed]
...ability. The white space allow for cognitive chunking, so you can see what groups with what.
Modern patterns also now support both relatively numbered and named backreferences now. That means you no longer need to count capture groups to figure out that you need $4 or \7. This helps when creating ...
Where can I get a list of Ansible pre-defined variables?
...ost.
Template (later called dump_variables):
HOSTVARS (ANSIBLE GATHERED, group_vars, host_vars) :
{{ hostvars[inventory_hostname] | to_yaml }}
PLAYBOOK VARS:
{{ vars | to_yaml }}
Playbook to use it:
- hosts: all
tasks:
- template:
src: templates/dump_variables
dest: /tmp/ansi...
UITableview: How to Disable Selection for Some Rows but Not Others
I am displaying in a group tableview contents parsed from XML. I want to disable the click event on it (I should not be able to click it at all) The table contains two groups. I want to disable selection for the first group only but not the second group. Clicking the first row of second group nav...
Run a single test method with maven
...y TestNG, (sorry, JUnit doesn't support this) test cases is I can assign a group to the test I want to run
@Test(groups="broken")
And then simply run 'mvn -Dgroups=broken'.
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How to check what user php is running as?
... Nice: the only non-privileged solution here to also find the group that PHP is running as.
– tanius
Dec 29 '14 at 3:25
2
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What is the difference between Unidirectional and Bidirectional JPA and Hibernate associations?
...ly for "one-to-very-many" and "many-to-very-many" relationships. Imagine a Group that contains thousands of Users:
How would you access them? With so many Users, you usually need to apply some filtering and/or pagination, so that you need to execute a query anyway (unless you use collection filter...
How to check permissions of a specific directory?
... Removing leading '/' from absolute path names
# file: tmp
# owner: root
# group: root
# flags: --t
user::rwx
group::rwx
other::rwx
[flying@lempstacker ~]$
or
[flying@lempstacker ~]$ stat -c "%a" /tmp
1777
[flying@lempstacker ~]$ stat -c "%n %a" /tmp
/tmp 1777
[flying@lempstacker ~]$ stat -c "%...
UITableView Cell selected Color?
...ells in plain-style tables (UITableViewStylePlain) and non-nil for section-group tables UITableViewStyleGrouped).
Therefore, if you're using a plain-style table, then you'll need to alloc-init a new UIView having your desired background colour and then assign it to selectedBackgroundView.
Alterna...
What is the difference between “px”, “dip”, “dp” and “sp”?
...hysical size, measured as the screen's diagonal.
For simplicity, Android groups all actual screen sizes into four
generalized sizes: small, normal, large, and extra-large.
Screen density
The number of pixels within a physical area of the
screen; usually referred to as dpi (dots per inc...