var num = 0;
function update(){
if(num==0) {selectAllLabel.show();deselectAllLabel.hide();langs.prop('checked', false);}
else if(num==langs.length) {selectAllLabel.hide();deselectAllLabel.show(); langs.prop('checked', true);}
}
$(function(){
selectAll.click(function(){
if(selectAllLabel.is(':hidden')) num = 0;
else num = langs.length;
update();
})
langs.click(function(){
if(this.checked) num++;
else num--;
invertSelect.click(function(){
for(var i=0;i<langs.length;i++)langs[i].checked = !langs[i].checked;
num = langs.length - num;
update(num);
});
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var num = 0;
function update(){
if(num==0) {selectAllLabel.show();deselectAllLabel.hide();langs.prop('checked', false);}
else if(num==langs.length) {selectAllLabel.hide();deselectAllLabel.show(); langs.prop('checked', true);}
}
$(function(){
selectAll.click(function(){
if(selectAllLabel.is(':hidden')) num = 0;
else num = langs.length;
update();
})
langs.click(function(){
if(this.checked) num++;
else num--;
update();
})
invertSelect.click(function(){
for(var i=0;i<langs.length;i++)langs[i].checked = !langs[i].checked;
num = langs.length - num;
update(num);
})
});