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Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
I'm looking for a way to dump the structure of an object, similar to the PHP functions print_r and var_dump for debugging reasons.
...
Can an html element have multiple ids?
...erefore, in XHTML 1.0 the
id attribute is defined to be of type
ID. In order to ensure that XHTML 1.0
documents are well-structured XML
documents, XHTML 1.0 documents MUST
use the id attribute when defining
fragment identifiers on the elements
listed above. See the HTML
Compatibility...
Can dplyr package be used for conditional mutating?
...== 4, g := 3L]
df[a %in% c(2,5,7) | (a==1 & b==4), g := 2L]
Note the order of conditional statements is reversed to get g correctly. There's no copy of g made, even during the second assignment - it's replaced in-place.
On larger data this would have better performance than using nested if-el...
Single Page Application: advantages and disadvantages [closed]
...ts directly. I have built a 10K LOC web app with Angular, Bootstrap & PHP as the primary players with about 5K of Angular JS code. There are some really neat features of Angular but at this point I really wish I had just used a traditional page based approach and I think it would have signific...
How to run a Runnable thread in Android at defined intervals?
...crease delayed when run long time
3. Solution
To avoid that Just change order of postDelayed(), to avoid delayed:
public void run() {
handler.postDelayed(this, 1000);
tv.append("Hello World");
}
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Limit results in jQuery UI Autocomplete
...ore efficient to limit directly the mysql result:
select [...] from [...] order by [...] limit 0,10
where 10 is the max numbers of rows you want
Unique ways to use the Null Coalescing operator [closed]
...escing operator means you can write pretty simple comparisons (whether for ordering or equality). For example, using a couple of helper classes in MiscUtil:
public int Compare(Person p1, Person p2)
{
return PartialComparer.Compare(p1.Age, p2.Age)
?? PartialComparer.Compare(p1.Name, p2....
Is there an interactive way to learn Vim? [closed]
...ww.openvim.com/
HJKL-learning game:
http://www.vim.org/scripts/script.php?script_id=3409
Screencasts:
http://derekwyatt.org/vim/tutorials/index.html
http://vimcasts.org
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improve thi...
What is the best way to solve an Objective-C namespace collision?
...
This is gross, but you could use distributed objects in order to keep one of the classes only in a subordinate programs address and RPC to it. That will get messy if you are passing a ton of stuff back and forth (and may not be possible if both class are directly manipulating view...
How to show all privileges from a user in oracle?
...s connect by prior granted_role = grantee start with grantee = '&USER' order by 1,2,3;
select * from dba_sys_privs where grantee = '&USER' or grantee in (select granted_role from dba_role_privs connect by prior granted_role = grantee start with grantee = '&USER') order by 1,2,3;
select ...