String.prototype.capitalize=function(){return this.charAt(0).toUpperCase()+this.slice(1);};
String.prototype.followCase=function(b){
	if(b==b.toUpperCase()){return this.toUpperCase();}
	if(b==b.toLowerCase()){return this.toLowerCase();}
	if(b==b.capitalize()){return this.capitalize();}
	return this;
};
String.prototype.atRemoveAdd=function(index,n,string){
	return this.substring(0,index)+string+this.substring(index+n,this.length);
};
String.prototype.matchIndex=function(re){
	var a=[];
	while((match=re.exec(this))!==null){
		a.push({chars:match[0].length,index:match.index});
	}
	return a;
};
String.prototype.caseReplace=function(o,n){
	for(var s=this,a=this.matchIndex(o),shift=0,i=0;i<a.length;i++){
		var c=n.followCase(this.substring(a[i].index,a[i].index+a[i].chars));
		s=s.atRemoveAdd(a[i].index+shift,a[i].chars,c);
		shift+=c.length-a[i].chars;
	}
	return s;
};

My code from 2016 for the hall of shame where I realized today that caseReplace could just return this.replace(o,m=>n.followCase(m)) instead.

By Anonymous, 2017-12-19 03:55:58
if (cookiesBannerHeight !== 0 && isMobile) {
      style = {
        top: cookiesBannerHeight === 0 ? 0 : cookiesBannerHeight
      }
}
By Kubus, 2018-02-28 11:00:11
let already_in = True;
while (already_in) {
    let random_index = Math.floor(arr.length * Math.random());
    let already_in = False;
    for (ex of exs) {
        if (ex.id === arr[random_index].id) {
            already_in = True;
        }
    }
}

Yes, this is JavaScript, and yes it didn't work. Found while reviewing some code

By L., 2021-05-17 11:20:12
scrollToEl($el.parent().parent().parent());

Someones idea of how to select an element to scroll to.... Please no.

By Anonymous, 2019-09-27 15:20:17
class FileReader extends EventTarget(...READER_EVENTS) {
    // [...]
    readAsArrayBuffer() {
        throw new Error('FileReader.readAsArrayBuffer is not implemented');
    }
}

React Native's way of saying they don't support FileReader.readAsArrayBuffer()

By Aurovik, 2018-12-12 12:50:22
function resetfields_simple()
{
	pole1=document.getElementById('dataOd');
	pole1.value='';
	pole2=document.getElementById('dataDo');
	pole2.value='';
	pole3=document.getElementById('trescKom');
	pole3.value='';	
	pole4=document.getElementById('katId');
	pole4.value='';	
}

function resetfields()
{
	pole1=document.getElementById('dataOd');
	pole1.value='';
	pole2=document.getElementById('dataDo');
	pole2.value='';
	pole3=document.getElementById('trescKom');
	pole3.value='';	
	pole4=document.getElementById('dokId');
	pole4.value='';	
	pole5=document.getElementById('katId');
	pole5.value='';	
	pole6=document.getElementById('currId');
	pole6.value='';		
}

function resetfields_arch()
{
	pole1=document.getElementById('dataOd');
	pole1.value='';
	pole2=document.getElementById('dataDo');
	pole2.value='';
	pole3=document.getElementById('trescKom');
	pole3.value='';	
	pole4=document.getElementById('dokId');
	pole4.value='';	
	pole5=document.getElementById('katId');
	pole5.value='';	
}
By javascriptowiec, 2020-06-30 21:29:57
pageEndReached() {
      if (!this.endOfResults) {
        //load more pages
        this.page++;
        this.getPosts();
      followerCount: null,
      postCount: null,
      measurementKeys: ["a", "b", "c", "d", "e"],
      showDrafts: false,
    };
  },

nani

By sonic, 2021-06-08 22:52:01
// What they did:
var serverCommands = {};
for(var each in commandList.general)
    (dmCommands[commandList.general[each].type] ? dmCommands[commandList.general[each].type] +=
    (config.prefix + each + (commandList.general[each].args ? ' ' + commandList.general[each].args : '') +
    ': ' + commandList.general[each].description + '\n') : (dmCommands[commandList.general[each].type] =
    '\u200B'+ config.prefix + each + (commandList.general[each].args ? ' ' + commandList.general[each].args : '') +
    ': ' + commandList.general[each].description + '\n'))

// What they should've done:
let srvrCmds = new Map();
let gldCmds = commandList[message.guild.id];
for (let each in gldCmds) {
    const cur = gldCmds[each];
    const text = `${config.prefix + each + (cur.args ? " " + cur.args : "")}: ${cur.description}\n`;
    const srvrCmdType = srvrCmds.get(cur.type);
    srvrCmds.set(cur.type, (srvrCmdType || "\u200B") + text);
}
By Anonymous, 2018-01-18 05:57:37
$options.splice($options.indexOf('option7'), 1);
$options.splice($options.indexOf('option5'), 1);
$options.splice($options.indexOf('option4'), 1);
$options.splice($options.indexOf('option3'), 1);
$options.splice($options.indexOf('option2'), 1);
$options.splice($options.indexOf('option1'), 1);
By A "senior" developer, 2018-02-19 16:49:52
function clean(toClean, source){
	if (typeof(toClean) !== 'string') return true;
	if (typeof(source) !== 'string') return true;
	
	return source.replace(toClean, String('CLEANED')).toString();
}

Found this in a project at work and someone clearly doesn't trust JavaScripts typeof function

By Anonymous, 2018-06-02 22:09:57
$(document).on('click', '.edit-item', function(event) {
    let row_id = event.currentTarget.attributes['data-row'].value,
    data = dataIndex[
        dataIndex.findIndex(i => i.id === Number(row_id))
    ];
    $('.modal-body div:nth-child(1) input').attr('value', data.name)
    $('.modal-body div:nth-child(2) input').attr('value', data.category)
    $('.modal-body div:nth-child(3) #basicSelect').val(data.status)
    $('.modal-body div:nth-child(4) input').attr('value', data.price)
    $('.modal-body div:nth-child(5) input').attr('value', data.bju.mass)
    $('.modal-body div:nth-child(6) input').attr('value', data.bju.calories)
    $('.modal-body div:nth-child(7) input').attr('value', data.bju.proteins)
    $('.modal-body div:nth-child(8) input').attr('value', data.bju.fats)
    $('.modal-body div:nth-child(9) input').attr('value', data.bju.carbohydrates)
}
)
By Nik Destrave, 2021-05-30 21:59:31
let showDots = typeof project.showDots === 'boolean' ? project.showDots : false;

if (showDots) {
    // Somecode ...
}

Why, just why??

By Anonymous, 2017-08-08 11:41:49
isCreatedUser : !this.isEdit ? true : false

Vue.js project, someone wanted to verify if the user was being edited or created...

By rat, 2021-10-21 17:11:54
		roots.push(resolver(Config.root, `${pageDir}${path.sep}${page}${path.sep}${page}.html`));
By Anonymous, 2023-04-01 10:39:37
/**
 * Stringify a JSON object
 * @param {*} value JSON value to stringify
 * @returns {string} stringify JSON
 */
function stringify(value) {
    var result = {};
    try {
        result = JSON.stringify(value);
    } catch (e) {
        Logger.error('Error while trying to stringify ' + e);
        result = JSON.stringify(result);
    }
    return result;
}

Stringify a JSON object

By Ihor Did, 2023-04-12 19:36:08