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How to concatenate columns in a Postgres SELECT?
...catenated to NULL is NULL. If NULL values can be involved and the result shall not be NULL, use concat_ws() to concatenate any number of values (Postgres 9.1 or later):
SELECT concat_ws(', ', a, b) AS ab FROM foo;
Or concat() if you don't need separators:
SELECT concat(a, b) AS ab FROM foo;
No...
How do I check if an array includes a value in JavaScript?
...e', 'jane', 'mary'].includes('jane')); //true
You can also use Array#indexOf, which is less direct, but doesn't require polyfills for outdated browsers.
Many frameworks also offer similar methods:
jQuery: $.inArray(value, array, [fromIndex])
Underscore.js: _.contains(array, value) (also alia...
How to write a cron that will run a script every day at midnight?
...2
wd day of week 0-7 (Sunday = 0 or 7)
command: what you want to run
all numeric values can be replaced by * which means all
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How do I auto size a UIScrollView to fit its content
... size.
Source:
https://developer.apple.com/library/ios/technotes/tn2154/_index.html
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Advances social tools app with cool UI - Koded Apps - Kodular Community
...osition: absolute;
left: 0;
top: 0;
width: 100%;
z-index: 1001;
--animation-state: paused;
}
#d-splash .preloader-image {
max-width: 100%;
height: 100vh;
}
#d-splash .preloader-text-wrapper {
position: absolute;
opacity: 0;
...
Best Practice to Organize Javascript Library & CSS Folder Structure [closed]
...contained in a folder. Inside this folder you must create your application index file or main entry point. appcropolis-project my-index.html Generally, your application will be comprised of HTML, CSS, Images, and Javascript files. Some of those files will be specific to your application and so...
Adding multiple class using ng-class
...t;</div>
2. Adds 'odd' or 'even' classes to div, depending on the $index:
<div ng-class="[{0:'even', 1:'odd'}[ $index % 2]]"></div>
3. Dynamically creates a class for each div based on $index
<div ng-class="[{true:'index'+$index}[true]]"></div>
If $index=5 this ...
Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...iew::Base.field_error_proc = Proc.new do |html_tag, instance|
class_attr_index = html_tag.index 'class="'
if class_attr_index
html_tag.insert class_attr_index+7, 'error '
else
html_tag.insert html_tag.index('>'), ' class="error"'
end
end
This allows me to merely add a class nam...
string.charAt(x) or string[x]?
...rks I did showed a three time decrease in performance when using charAt vs indexer in Chrome when the string is boxed in an object. I know that's not really relevant, but still worth noting.jsfiddle.net/mdasxxd2
– Siderite Zackwehdex
Jul 25 '16 at 10:51
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How do you create different variable names while in a loop? [duplicate]
...ments in a Python list that don't yet exist (you'll get a "list assignment index out of range" error). You may want to use string.append("Hello") instead.
– Greg Hewgill
May 31 '11 at 1:10
...