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Storing money in a decimal column - what precision and scale?
... a decimal scale of 8 (or more) is required but this is where a 'normal' monetary amount (say four decimal places) has been pro rata'd, implying the decimal precision should be reduced accordingly (also consider a floating point type in such circumstances). And no one has that much money nowadays to...
SortedList, SortedDictionary and Dictionary
... Types of the System.Collections.Generic namespace.
http://geekswithblogs.net/BlackRabbitCoder/archive/2011/06/16/c.net-fundamentals-choosing-the-right-collection-class.aspx
Extracts:
Dictionary<>
The Dictionary is probably the most used associative container class. The Dictionary is th...
When to use setAttribute vs .attribute= in JavaScript?
...deValue.
Performance
I've built a jsperf test case to show the difference: https://jsperf.com/set-attribute-comparison. Basically, In order:
Custom properties because they don't affect the DOM and are not attributes.
Special mappings provided by the browser (dir, id, className).
If attributes alrea...
Checking for empty arrays: count vs empty
... for arrays. empty is more general and can be applied to other types.
php.net gives the following warning for count though :
count() may return 0 for a variable that isn't set, but it may also return 0 for a variable that has been initialized with an empty array. Use isset() to test if a variab...
How to handle click event in Button Column in Datagridview?
...
In VB.net you don't have to check the column index. I'm using this exact example for a dgv with two columns. One column that's editable and the 2nd with a remove buttton. I click all over the dgv and the event only fires off when I...
Combining two expressions (Expression)
...,
Expression.Invoke(expr2, param)), param);
}
Starting from .NET 4.0, there is the ExpressionVisitor class which allows you to build expressions that are EF safe.
public static Expression<Func<T, bool>> AndAlso<T>(
this Expression<Func<T, bool>&g...
How can I store my users' passwords safely?
...y (one PHP file) that will give you PHP 5.5's password_hash in PHP 5.3.7+: https://github.com/ircmaxell/password_compat
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Using Gulp to Concatenate and Uglify files
... }))
.pipe(uglify({
output: { // http://lisperator.net/uglifyjs/codegen
beautify: debug,
comments: debug ? true : /^!|\b(copyright|license)\b|@(preserve|license|cc_on)\b/i,
},
compress: { // http://lisperator.net/uglifyj...
Splitting string into multiple rows in Oracle
...str2tbl function used in this answer was originally developed by Tom Kyte:
https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:110612348061
The concept of associating statistics with object types can be further explored by reading this article:
http://www.oracle-developer.net/displ...
C# Interfaces. Implicit implementation versus Explicit implementation
...red Sep 27 '08 at 11:09
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