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.border-radius(@val) {
	-webkit-border-radius: @val;
	-moz-border-radius: @val;
	border-radius: @val;
}

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.box-shadow (...) {
	box-shadow: @arguments;
	-moz-box-shadow: @arguments;
	-webkit-box-shadow: @arguments;
	-o-box-shadow: @arguments;
}

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.background-size (...) {
	background-size:@arguments;
	-webkit-background-size: @arguments;
}

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.button-gradient (@start, @end) {
	background: -webkit-gradient( linear, left top, left bottom, color-stop(0.05, @start), color-stop(1, @end) );
	background: -webkit-linear-gradient(top, @start 5%, @end 100% );
	background: -moz-linear-gradient(top, @start 5%, @end 100% );
	background: -o-linear-gradient(top, @start 5%, @end 100% );
	background: -ms-linear-gradient(top, @start 5%, @end 100% );
	background: linear-gradient(top, @start 5%, @end 100% );
	background-color: @start;
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='@{start}', endColorstr='@{end}');
}

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/* low resolutions */
@media only screen and (max-width: 1023px) {

}

/* handheld */
@media handheld, only screen and (max-width: 767px) {

}

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<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7">

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// scales the bg to the element size
@mixin ms-bgsize ($bg)
{	filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='#{$bg}',sizingMethod='scale');
	-ms-filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='#{$bg}',sizingMethod='scale');
	background-image: none;
}

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// simple ms gradient
@mixin ms-gradient ($start, $end) {
	filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#{ie_hex_str($start)},endColorstr=#{ie_hex_str($end)});
	-ms-filter: progid:DXImageTransform.Microsoft.Gradient(StartColorStr='#{ie_hex_str($start)}', EndColorStr='#{ie_hex_str($end)}');
}

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<?php
/**
 * UUID class
 *
 * The following class generates VALID RFC 4211 COMPLIANT
 * Universally Unique IDentifiers (UUID) version 3, 4 and 5.
 *
 * UUIDs generated validates using OSSP UUID Tool, and output
 * for named-based UUIDs are exactly the same. This is a pure
 * PHP implementation.

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// create the function
DB::connection()->pdo->sqliteCreateFunction("REGEXP", "preg_match", 2);

// build a query
DB::table('tablename')->raw_where('REGEXP("#^[a-z]+$#iu", tablename.row)')->get();