logo
down
shadow

Scoping a StringBuilder inside a for loop


Scoping a StringBuilder inside a for loop

Content Index :

Scoping a StringBuilder inside a for loop
Tag : java , By : user157138
Date : January 10 2021, 01:57 PM


Comments
No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

Is using StringBuilder Remove method more memory efficient than creating a new StringBuilder in loop?


Tag : chash , By : Feroz
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

Using a loop variable inside a function, javascript scoping confusion


Tag : javascript , By : Milander
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);
        }
    );
});

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);

Is there a memory penalty to use a string rather than a StringBuilder inside a loop?


Tag : java , By : flesk
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();            
}

How to correct Laravel's Blade variable section scoping when yielding inside a loop?


Tag : php , By : beng
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); ?>';
}
Related Posts Related QUESTIONS :
  • What code analysis tools do you use for your Java projects?
  • IllegalArgumentException or NullPointerException for a null parameter?
  • How do I configure and communicate with a serial port?
  • What are the different methods to parse strings in Java?
  • Android Broadcastreceiver for other apps install/delete not working
  • Android Studio onClick not working in BindViewHolder
  • How to use Spring Converter for some controllers only?
  • How verify that 3 numbers in sequence are equals?
  • When using .compareTo to compare dates, why doesn't it take Months into account?
  • Does the perfomance of "filter then map" and "map then filter" differ in a Stream?
  • How can I set the initial Delay after pressing the start Button to a specific time (HH:mm:ss) format
  • How to switch between Android devices during the tests
  • How to configure java.util.logging via properties to use standard output?
  • How to iterate through array in order
  • Is there better way of iteration to find the evenly divisible number?
  • How do I avoid using if statements with a large amount of variables in java
  • Writing JUnit test cases for a Spring Boot Service Application with autowired components
  • Cors for GET with Postman not showing headers
  • Printing values in different column same row using APACHE POI
  • Fully decompile java6 web application
  • Passing keycloak configuration parameters in the code rather than reading from application.properties
  • setDataSource() IO exception
  • Unexpected Output while retrieving Data from mongodb and displaying in a csv file?
  • Algorithm for searching a value in two arrays
  • How to avoid casting with generic return values?
  • Java/RegEx - Negation of pattern not working
  • How to split a string to non empty words if it might include a separator like tab on first place
  • Supplier<Sequence<String>> cannot be iterated more than once
  • Why there is only one thread can actually started in @PostConstruct method?
  • Manage CompletionStage inside of Netty handler
  • Url Problem while Developing on Localhost and deploy on Remote Virtual Server
  • How to identify the missing type id in Jackson error?
  • android data binding error: cannot find symbol
  • Spring Boot application with a jar dependency does not run after maven build
  • Spring Data JPA query , filter ? search engine ? JPQL?
  • Why LiveData returns null in ViewModel?
  • what this line of code mean....new URLClassLoader(new URL[0],getClass().getClassLoader());
  • Why do need to use new Random() instead of just Random Randomnum?
  • I want to access zk components from the java file
  • How do I cast FieldValue.serverTimestamp() to Kotlin/Java Date Class
  • Insertion Sort Double Array with User Input - JAVA
  • Creating 2 dimesional array with user input and find sum of specific columns
  • can not get Advertising ID Provider in android
  • Convert list of Objects to map of properties
  • How to represent an undirected weighted graph in java
  • Return values as array from collection
  • ByteBuddy generic method return cast to concrete type
  • ImageView hides the round corners of the parent
  • Is there a way to find setter method by its getter method or vice versa in a class?
  • Get aggregated list of properties from list of Objects(Java 8)
  • Unable to find a document in Mongodb where exact date match in java
  • UsernamePasswordAuthenticationFilter skips success handler
  • Use Java filter on stream with in a stream filter
  • Default Login not successful in spring boot 2.1.7
  • Adding key value pairs from a file to a Hashmap
  • Rub regex: matching a char except when after by another char
  • Convert Base64 String to String Array
  • Escape Unicode Character 'POPCORN' to HTML Entity
  • An empty JSON field which is a boolean/nullable field in Java model, is getting converted as null
  • Mongo java driver cannot find public constructor for interface
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com