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onKeyPress Vs. onKeyUp and onKeyDown
... an empty input element:
The value of the input element will be an empty string (old value) inside the keypress handler
The value of the input element will be 1 (new value) inside the keyup handler.
This is of critical importance if you are doing something that relies on knowing the new value af...
Using PHP with Socket.io
...th php/mysql/static files only) with adsl subscription, without paying any extra. So no, being able to buy crappy VPS for $5 is definitely not a solution.
– Olli
Apr 1 '12 at 12:51
...
Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
...the file is stored under C:\Program Files (x86)\Android\android-studio\sdk\extras\intel\Hardware_Accelerated_Execution_Manager, then I need to copy it to somewhere else.
– User
Sep 4 '14 at 8:14
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SQL order string as number
...o number
select col from yourtable
order by col + 0
BTW MySQL converts strings from left to right. Examples:
string value | integer value after conversion
--------------+--------------------------------
'1' | 1
'ABC' | 0 /* the string does not contain a number, so the re...
BestPractice - Transform first character of a string into lower case
I'd like to have a method that transforms the first character of a string into lower case.
11 Answers
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Batch file to delete files older than N days
...amples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task.
...
ActiveRecord: size vs count
...many association, size will use the cached count directly, and not make an extra query at all.
class Image < ActiveRecord::Base
belongs_to :product, counter_cache: true
end
class Product < ActiveRecord::Base
has_many :images
end
> product = Product.first # query, load product into m...
How to pass parameters correctly?
...ssing an rvalue (in this case, one move will be performed).
Account(std::string number, float amount, CreditCard const& creditCard)
: number(number), amount(amount), creditCard(creditCard) // copy here
{ }
Account(std::string number, float amount, CreditCard&& creditCard)
: number(n...
Representing graphs (data structure) in Python
...should be expressed only in terms of existence, or whether they carry some extra information.
From Python built-in data types point-of-view, any value contained elsewhere is expressed as a (hidden) reference to the target object. If it is a variable (i.e. named reference), then the name and the ref...
List of all special characters that need to be escaped in a regex
... It's safer to escape it. For example, the patterns [-] and [-)] match the string - but not with [(-)].
– Kenston Choi
Sep 12 '16 at 5:28
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