Is using StringBuilder Remove method more memory efficient than creating a new StringBuilder in loop?
Date : March 29 2020, 07:55 AM
This might help you Several of the answers gently suggested that I get off my duff and figure out it myself so below are my results. I think that sentiment generally goes against the grain of this site but if you want something done right, you might as well do.... :) I modified option #1 to take advantage of @Ty suggestion to use StringBuilder.Length = 0 instead of the Remove method. This made the code of the two options more similar. The two differences are now whether the constructor for the StringBuilder is in or out of the loop and option #1 now uses the the Length method to clear the StringBuilder. Both options were set to run over an outputStrings array with 100,000 elements to make the garbage collector do some work. ClassName Instances TotalBytesAllocated Gen0_InstancesCollected Gen0BytesCollected Gen1InstancesCollected Gen1BytesCollected
=======Option #1
System.Text.StringBuilder 100,001 2,000,020 100,016 2,000,320 2 40
System.String 301,020 32,587,168 201,147 11,165,268 3 246
System.Char[] 200,000 8,977,780 200,022 8,979,678 2 90
System.String[] 1 400,016 26 1,512 0 0
System.Int32 100,000 1,200,000 100,061 1,200,732 2 24
System.Object[] 100,000 2,000,000 100,070 2,004,092 2 40
======Option #2
System.Text.StringBuilder 200,000 4,000,000 200,011 4,000,220 4 80
System.String 401,018 37,587,036 301,127 16,164,318 3 214
System.Char[] 200,000 9,377,780 200,024 9,379,768 0 0
System.String[] 1 400,016 20 1,208 0 0
System.Int32 100,000 1,200,000 100,051 1,200,612 1 12
System.Object[] 100,000 2,000,000 100,058 2,003,004 1 20
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Using a loop variable inside a function, javascript scoping confusion
Date : March 29 2020, 07:55 AM
wish helps you I have built a dropdown menu system, everything works when tested independently, the problem I have is in the code below. I use the jQuery ready function to build the menu bar from an external array (menubar[]). Here I am trying to get the mouseover event to call the dropdown() function, but using a different argument for each anchor tag. $(function() {
$(menubar).each(function(i){
$("#menu").append('<a href="' + baseurl + '/' + menubar[i].url + '" class="menutitle">' + menubar[i].name + '</a>');
});
$("#menu a").hover(
function(){
dropdown($(this).index());
},
function(){
activeTimer = setTimeout("removedropdowns()", 100);
}
);
});
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Stringbuilder add new line inside foreach loop
Tag : chash , By : Alpinfish
Date : March 29 2020, 07:55 AM
Any of those help In html new line is not \r\n but it's , so you need to add after each element, a simple string.Join should work fine: var result = string.Join("<br>", groups);
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Is there a memory penalty to use a string rather than a StringBuilder inside a loop?
Date : March 29 2020, 07:55 AM
should help you out since garbage collector doesn't allow memory leak, there's no memory penalty because this statement: str_1 = an_object_var.toString();
for(long i = 0; i < 1000000000000; i++)
{
an_object_var=(Object)i;
str_1 = an_object_var.toString();
}
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How to correct Laravel's Blade variable section scoping when yielding inside a loop?
Date : March 29 2020, 07:55 AM
wish helps you After wading through the source code, namely BladeCompiler and View/Factory I noticed the following snippet: protected function compileOverwrite($expression)
{
return '<?php $__env->stopSection(true); ?>';
}
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