Develop Reference

Multiplying variables and showing result in a box

I'm having a problem when trying to multiply the totalPallets by the price-per-pallet ($25) and then showing that in the productSubTotal box. With the code as it is right now, the quatity total shows but when I try to get the price result, it doesn't show the operation. Also, if I try changing anythung from the code, the whole thing breaks down. I'll be thankful if anyone could help me. Thanks
// UTILITY FUNCTIONS
function IsNumeric(n) {
return !isNaN(n);
}
function calcTotalPallets() {
var totalPallets = 0;
$(".num-pallets-input").each(function() {
var thisValue = parseInt($(this).val());
if ( (IsNumeric(thisValue)) && (thisValue != '') ) {
totalPallets += parseInt(thisValue);
};
});
$("#quantitytotal").val(totalPallets);
}
function calcProdSubTotal() {
var prodSubTotal = 0;
$(".totalprice").each(function() {
var valString = parseInt(totalPallets) * multiplier;
prodSubTotal += parseInt(valString);
});
$("#product-subtotal").val(CommaFormatted(prodSubTotal));
};
// "The Math" is performed pretty much whenever anything happens in the quanity inputs
$('.num-pallets-input').bind("focus blur change keyup", function(){
// Caching the selector for efficiency
var $el = $(this);
// Grab the new quantity the user entered
var numPallets = CleanNumber($el.val());
var totalPallets = CleanNumber($el.val());
var prodSubTotal = CleanNumber($el.val());
// Find the pricing
var multiplier = $el
.parent().parent()
.find("td.price-per-pallet span")
.text();
};
// Calcuate the overal totals
calcProdSubTotal();
calcTotalPallets();
});
function CommaFormatted(amount) {
var delimiter = ",";
var i = parseInt(amount);
if(isNaN(i)) { return ''; }
i = Math.abs(i);
var minus = '';
if (i < 0) { minus = '-'; }
var n = new String(i);
var a = [];
while(n.length > 3)
{
var nn = n.substr(n.length-3);
a.unshift(nn);
n = n.substr(0,n.length-3);
}
if (n.length > 0) { a.unshift(n); }
n = a.join(delimiter);
amount = "$" + minus + n;
return amount;
}
});

String modification issue in JS

I have a string like "word_count". How can I transform it to "WordCount" in an elegant way using JavaScript? My decision seems too complicated to me. I'll be very grateful for your help.

function titleCase(str)
{
return str.split("_")
.map(function (s) { return s.charAt(0).toUpperCase() + s.slice(1); })
.join("");
}

Take a look at this. I don't want to just copy paste everything here, but it seems to be just what you're looking for.
Here is the function modified to fit your request:
String.prototype.toCamel = function(){
return this.replace(/((^|\_)[a-z])/g, function($1){
return $1.toUpperCase().replace('_','');});
};
And here it is in action.

You can use a regular expression to match either a letter at the start of the string or a letter after an underscore, and use a callback to turn the letter into uppercase:
s = s.replace(/(?:^|_)([a-z])/g, function(m, g){
return g.toUpperCase();
});
Demo: http://jsfiddle.net/Guffa/ByU6P/

Simple, like this:
var string = "word_count".split("_");
for(var i = 0; i<string.length;i++) {
string[i] = string[i].charAt(0).toUpperCase() + string[i].substr(1);
}
var myNiceString = string.join();
If you want to add it to the String object, you can do this:
String.prototype.titleCase = function() {
var split = this.split("_");
for(var i = 0; i<split.length;i++) {
split[i] = split[i].charAt(0).toUpperCase() + split[i].substr(1);
}
return split.join("");
}
You'd call it like "word_count".titleCase();

You can use a function like the following:
var Pascalize = function(word) {
var x = word;
result = '';
if(-1 != word.indexOf('_')) {
x = word.split('_');
for(var i=0;i<x.length;i++) {
result += x[i].substr(0, 1).toUpperCase() + x[i].substr(1);
}
}
if('' == result) { result = word; }
return result;
};
var PascalCaseString = Pascalize("this_is_a_test");
// PascalCaseString value is now 'ThisIsATest'
Here's a working example

var str = "word_count";
var re = /\b(.)([^_]+)_(.)/;
var newWord = str.replace(re, function(m,f,t,l){ return f.toUpperCase() + t + l.toUpperCase();})
console.log(newWord);

Using jQuery, you could do the following:
var result = '';
$.each('word_count'.split('_'), function(idx,elem){
result = result + elem.substr(0,1).toUpperCase() + elem.substr(1);
});

New version (works with any amount of _):
function fixString(sString) {
var aWords = sString.split("_"),
sResults = "";
for (var i in aWords)
sResults += aWords[i].charAt(0).toUpperCase() + aWords[i].slice(1);
return sResults;
}
The compressed form:
function fixString(c){var d=c.split("_"),a="";for(var b in d){a+=d[b].charAt(0).toUpperCase()+d[b].slice(1)}return a};
Old:
function fixString(sString) {
return sString.replace(/(.*)_(.*)/, function(sWhole, $1, $2, sWTF) {
return ucfirst($1) + ucfirst($2);
} )
function ucfirst (str) {
str += '';
var f = str.charAt(0).toUpperCase();
return f + str.substr(1);
}
}
... or the compressed version:
function fixString(b){return b.replace(/(.*)_(.*)/,function(e,c,f,d){return a(c)+a(f)});function a(d){d+="";var c=d.charAt(0).toUpperCase();return c+d.substr(1)}};
Of course, this is used like fixString("word_count") which results in your desired WordCount.

I've looked at all the answer and none did precisely what I wanted. I wanted an idempotent function which converted to camelCase (not PascalCase) and I liked the String prototype extension approach (although obviously this isn't always the best medicine).
Anyway, here's where I ended up:
String.prototype.camelize = function(){
var pascalCase = this.replace(/((^|\_)[a-z])/g, function($1){
return $1.toUpperCase().replace('_','');
});
return pascalCase.charAt(0).toLowerCase() + this.slice(1);
};

var aStringLike = "word_count";
// magic follows
aStringLike = "WordCount";

How to replace only first sequential occurences (fuzzymatch)?

I'm trying to write "fuzzy" match and I can't find a way to solve this problem:
Data in: makrusakkk, query: mrk, expected result: <b>m</b>ak<b>r</b>usa<b>k</b>kk.
RegExp: "makrusakkk".match(/(m).*?(r).*?(k)/i) returns ["makrusak", "m", "r", "k"].
So the question is: is there a way to get the expected result using RegExp?

I think using regular expression for such problem makes things just more complicated. The following string and loop based solution would lead to the result:
function fuzzySearch(query, input) {
var inds = patternMatches(query, input);
if(!inds) return input;
var result = input;
for(var i = inds.length - 1; i >= 0; i--) {
var index = inds[i];
result = result.substr(0,index) +
"<b>" + result[index] + "</b>" +
result.substr(index+1);
}
return result;
}
function patternMatches(query, input) {
if(query.length <= 0) {
return [];
} else if(query.length == 1) {
if(input[0] == query[0]) return [0];
else return [];
} else {
if(input[0] != query[0])
return false;
var inds = [0];
for(var i = 1; i < query.length; i++) {
var foundInd = input.indexOf(query[i], inds[i-1]);
if(foundInd < 0) {
return [];
} else {
inds.push(foundInd);
}
}
return inds;
}
}
var input = "makrusakkksd";
var query = "mrk";
console.log(fuzzySearch(query, input));
console.log(patternMatches(query, input));
Here's a live demo too: http://jsfiddle.net/sinairv/T2MF4/

Here you will need for:
function search_for_it(txt, arr){
for(i=0;i<arr.length;i++){
var reg = new RegExp(arr[i], "i");
txt = txt.replace(reg, "<b>"+arr[i]+"</b>");
}
return txt;
}
search_for_it("makrusakkk", ["m","r","k"]);
//return "<b>m</b>a<b>k</b><b>r</b>usakkk"
PS: Your expected result is incorrect. There is a k after the first a.

is there a way to get an expected result using RegExp?
There is.
"makrusakkk".replace(/(m)(.*?)(r)(.*?)(k)/i, '<b>$1</b>$2<b>$3</b>$4<b>$5</b>'​​​​​​​)

I feel vaguely dirty for this, but...regardless; here's one way to do it:
$('#s').keyup(
function(e) {
var w = e.which;
if (w == 8 || w == 46) {
return false;
}
var listElems = $('ul:first li'),
search = $(this).val().replace(/w+/g, ''),
r = search.split(''),
rString = [];
$.each(r, function(i, v) {
rString.push('(' + v + ')');
});
var reg = new RegExp(rString.join('(\\d|\\D)*'), 'gi');
listElems.each(
function() {
if (!$(this).attr('data-origtext')) {
$(this).attr('data-origtext', $(this).text());
}
$(this).html($(this).attr('data-origtext').replace(reg, '<b>$&</b>'));
});
});​
JS Fiddle demo.
It could, almost certainly, benefit from quite some simplification though.
References:
attr().
:first selector.
join().
keyup().
push().
RegExp().
replace().
split().
text().
val().

JavaScript isCurrency() failing

hey guys should be a easy one...I have some javascript that is turning my input values into currency values. Problem is it will fail if I try to type in .5 heres is my code:
function handleCurrency(formName,fieldName)
{
var enteredValue = document.forms[formName].elements[fieldName].value;
if ( enteredValue.isCurrency() )
{
alert("This is currency " + enteredValue )
// Put the nicely formatted back into the text box.
document.forms[formName].elements[fieldName].value = enteredValue.toCurrency();
}
}
jsp:
<td><input type="text" name="replacementCost" onchange="handleCurrency('NsnAdd','replacementCost')" value="<ctl:currencyFormat currency='${form.replacementCost}'/>" onkeypress="javascript:return noenter();" <c:if test="${!lock.locked}">disabled="disabled"</c:if> /></td>
How can I make it so that .5 is allowable also to be formatted?
custom javascript:
var patternWithCommas = new RegExp("^\\s*\\$?-?(\\d{1,3}){1}(,\\d{3}){0,}(\\.\\d{1,2})?\\s*$");
var patternWithoutCommas = new RegExp("^\\s*\\$?-?\\d+(\\.\\d{1,2})?\\s*$");
function stringIsCurrency()
{
if (patternWithoutCommas.test(this))
{
return true;
}
else if (patternWithCommas.test(this))
{
return true;
}
return false;
}
function stringToCurrency()
{
if (this == '') return this;
var str = this.replace(/[$,]+/g,'');
sign = (str == (str = Math.abs(str)));
str = Math.floor(str*100+0.50000000001);
cents = str%100;
str = Math.floor(str/100).toString();
if (cents<10) cents = "0" + cents;
for (var i = 0; i < Math.floor((str.length-(1+i))/3); i++)
{
str = str.substring(0,str.length-(4*i+3))+','+
str.substring(str.length-(4*i+3));
}
str = '$' + ((sign)?'':'-') + str + '.' + cents;
return str;
}
String.prototype.isCurrency = stringIsCurrency;
String.prototype.toCurrency = stringToCurrency;
basically it needs to allow .5 and not just 0.5
this needs to be updated:
var patternWithCommas = new RegExp("^\\s*\\$?-?(\\d{1,3}){1}(,\\d{3}){0,}(\\.\\d{1,2})?\\s*$");

You have not shown your code for isCurrency.
Here's how I would do it:
function isCurrency( val )
{
return /^\$?(?:\d[\d,]*)?(?:.\d\d?)?$/.test( val );
}
See it here in action: http://regexr.com?3103a
Now that you have provided your code, here's my proposed solution.
While there are many things I would have done differently,
in order to keep the spirit of your code, just change this:
var patternWithCommas = new RegExp("^\\s*\\$?-?(\\d{1,3}){1}(,\\d{3}){0,}(\\.\\d{1,2})?\\s*$");
var patternWithoutCommas = new RegExp("^\\s*\\$?-?\\d+(\\.\\d{1,2})?\\s*$");
to this:
var patternWithCommas = /^\s*\$?-?((\d{1,3}){1}(,\d{3})?)?(\.\d{1,2})?\s*$/;
var patternWithoutCommas = /^\s*\$?-?(\d+)?(\.\d{1,2})?\s*$/;
which would make the dollar amount optional.

Jquery counting

How do i count #total value + 170 with jquery?
$("#member").click(function() {
if ($('#member').is(':checked')) {
var totalv = $("#total").val();
var skatz = 170;
var skaits = totalv + skatz;
$("#total").val(skaits);
}

You should check if the provided value is actually a number (You can do onkeypress or keyup each time but I say you should always check on submission). Below is your code modified to work (With checks to see if the value is a number).
EDIT: Make sure that your javascript has document ready wrapped around it. (Functions can be outside of this call)
$(document).ready(function () {
$("#member").click(function() {
if ($('#member').is(':checked')) {
var totalv = $("#total").val();
if(isNumber(totalv) == true)
{
var skatz = 170;
var skaits = parseInt(totalv) + skatz;
$("#total").val(skaits);
}
else
{
alert("You must enter a numerical value");
}
}
});
function isNumber(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}

The result of .val() will be a string, so you first need to convert it to a number:
var totalv = $("#total").val();
var skatz = 170;
var skaits = +totalv + skatz;
$("#total").val(skaits);
(notice the additional + prefix to the totalv variable.