A Code Specific to an example to generate permuted block randomization for sampling

functions.js

function generateRandom(_threshold){
	var threshold = _threshold || 0.5;
	returnArray = [];
	holdArray = [];
	for(var i = 1; i<=200; i++) {
		holdArray = []; //init
		for(var j = 1; j<=6; j++) {
			if(Math.random() >= threshold){
				if(howmanyInArray(holdArray, "odd") >= 3) {
					holdArray.push("even");
				} else {
					holdArray.push("odd");
				}
			} else {
				if(howmanyInArray(holdArray, "even") >= 3) {
					holdArray.push("odd");
				} else {
					holdArray.push("even");
				}
			}
		}
		returnArray.push(holdArray);
	}
	return returnArray;
}

function howmanyInArray(arr, num){
	var count = 0;
	for (var i = arr.length - 1; i >= 0; i--) {
		if(arr[i] == num){
			count++;
		}
	};
	return count;
}

function writeCSVFrom2DArray(arr){
	//Assume array is 2d
	//
	for (var i = arr.length - 1; i >= 0; i--) {
		document.write(arr[i].join(","));
		document.write("\n");
	};
}

run.js

var arr = generateRandom();
writeCSVFrom2DArray(arr);

/** View Source and copy to a text file
    renaming to to <something>.csv
    -- Open with Spreadsheet program
**/