C.Lang is right, this is not a place to get readymade scripts ... but since this question is so common and has been aswered so often it took me a few minutes to write and test... so there it is :
var ss=SpreadsheetApp.getActiveSpreadsheet();// some global variables
var master = ss.getSheetByName('All_Mileage');
var colWidth = master.getMaxColumns();
function copyRowsOnCondition() {
var data = master.getDataRange().getValues();
for(n=2;n<data.length;++n){
if(data[n][1].length<16){ // if not pre-filled with your text
Logger.log(data[n][1])
var dest = ss.getSheetByName(data[n][1].toString().replace(/ /g,''));//remove any spaces that could be included in the name so the name = sheetName for sure
var destRange = dest.getRange(dest.getLastRow()+1,1);// the place to write
master.getRange(n+1,1,1,colWidth).copyTo(destRange);the copy itself value & format
}
}// loop
}
EDIT : since I used the name value in MasterSheet to find destination sheet I thought it might be usefull to handle the case where the destination sheet doen't exist by creating it using the same rule, ie. name = sheetName
...
The other issue was that there was no way to know which rows had been already copied... so I made a version that handles all that, copying only the rows that are manually selected (even in only a single column) and change the background color to tell that these rows have been processed. I also added a menu for a minimal comfort ;-)
(how to keep busy on a cold sunday afternoon ;-)
var ss=SpreadsheetApp.getActiveSpreadsheet();
var master = ss.getSheetByName('All_Mileage');
var colWidth = master.getLastColumn();// last used col in masterSheet
var sheets = ss.getSheets();// number of sheets
function onOpen() {
var menuEntries = [ {name: "Copy selected Rows to sheets", functionName: "copyRowsOnConditionV2"},
];
ss.addMenu("Copy functions",menuEntries);// custom menu
}
function copyRowsOnConditionV2() {
var sheetNames = [];// array of existing sheet names
var sheets = ss.getSheets();// number of sheets
for(s=0;s<sheets.length;++s){sheetNames.push(sheets[s].getName())};
ss.getActiveSelection().setBackground('#ffffbb');
var selectedfirstRow = ss.getActiveSelection().getRowIndex();
var selectedHeigth = ss.getActiveSelection().getHeight()
var selectedFullRange = master.getRange(selectedfirstRow,1,selectedHeigth,colWidth);
var data = selectedFullRange.getValues();
for(n=0;n<data.length;++n){
if(data[n][1].length<16){
if(sheetNames.toString().match(data[n][1].toString().replace(/ /g,''))!=data[n][1].toString().replace(/ /g,'')){// if no sheet exist with this name
var newSheet = ss.insertSheet(data[n][1].toString().replace(/ /g,''),ss.getSheets().length);// then create it
master.getRange(1,1,2,colWidth).copyTo(newSheet.getRange(1,1));// and copy the headers on 2 first rows, then continue as usual
newSheet.getRange(1,1).setValue('Gas Mileage Log - '+data[n][1].toString().replace(/ /g,''));// set name in header
SpreadsheetApp.flush();
var sheets = ss.getSheets();// number of sheets
var sheetNames = [];// update array of existing sheet names
for(s=1;s<sheets.length;++s){sheetNames.push(sheets[s].getName())};
Logger.log(sheetNames)
};
var dest = ss.getSheetByName(data[n][1].toString().replace(/ /g,''));//find the destination sheet
Logger.log(data[n][1].toString().replace(/ /g,''))
var destRange = dest.getRange(dest.getLastRow()+1,1);// define range
master.getRange(selectedfirstRow+n,1,1,colWidth).copyTo(destRange);// and make copy below last row
}
}
}
Illustration below :