Processing of arrays of strings

arrayFunctions.js

/* Checks if a string is contained inside the given array of strings
 * If the second variable is a string, it just compares them
 * If the second variable is neither string or array, it returns false */
function checkIfStringInArray(str, arr) {
	if (typeof arr === 'string')
		return str === arr;
	if (arr.constructor && arr.constructor === Array)
		for (var i in arr) {
			if (str === arr[i]) {
				return true;
			}
		}
	return false;
}

//Accepts an array of arrays of strings, and returns a single array of unique strings
function concatMultiDimensionalStrArr(strArr) {
	var finArr = []
	for (var i in strArr) {
		for (var j in strArr) {
			if (!checkIfStringInArray(strArr[i][j], finArr) && strArr[i][j]) {
				finArr.push(strArr[i][j])
			}
		}
	}
	return finArr
}

//Accepts an array of strings, and returns a single array of unique strings
function concatStrArr(strArr) {
	var finArr = []
	for (var i in strArr) {
		if (!checkIfStringInArray(strArr[i], finArr) && strArr[i]) {
			finArr.push(strArr[i])
		}
	}
	return finArr
}
function escapeQuotes(array) {
	var int_arr = [];
	for (var i in array) {
		int_arr.push(array[i].trim().replace('\'','\\\''));
	}
	return int_arr;
}