You have a Google Spreadsheet and you need to programmatically find if a cell with particular value exists in that sheet. Well, Google Scripts can help. You can either search cells in a single column (like A) or the script can search for all cells in the row and return the index of the matching row.
function findInColumn(column, data) { var sheet = SpreadsheetApp.getActiveSpreadsheet(); var column = sheet.getRange(column + ":" + column); // like A:A var values = column.getValues(); var row = 0; while ( values[row] && values[row][0] !== data ) { row++; } if (values[row][0] === data) return row+1; else return -1; } function findInRow(data) { var sheet = SpreadsheetApp.getActiveSpreadsheet(); var rows = sheet.getDataRange.getValues(); for (var r=0; r