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I've made this small tool but I'm not sure how to achieve what I need.
I would like it to subtract from the "Points Left" when adding to the others.
(Not going below zero into the negative, only 30 points).
I would also like to prevent going BELOW the initial numbers in "Weapon Power" and "Magic Power".
(I would like to be able to only spend a maximum of 25 points into one "power")
I think it kind of explains itself so maybe I'm just confusing you more.
Any ideas?
DEMO
You need to give your number input elements distinct ids, because when you do document.getElementById, it will only return you the first element with the given ids.
Then, you need to give another distinct ID to the "points left" field for each character, and update that one. To do that, you'll need to pass to add and substract the correct value ( add(warrior, 'weapon'), add(wizard, 'magic')).
You need to be able to get your IDs from your warrior or wizard object, so you could try doing this:
var wizard = {
weapon:"idOfWeaponField", magic:"idOfMagicField", points:"idOfPointsField"
};
where the string values are the ids of your elements.
Then, within your add function, you can access your id like this
function add(character, statName){
var myID = character[statName];
}
and update the correct input value.
EDIT: code here.
I would also like to prevent going BELOW the initial numbers in "Weapon Power" and "Magic Power". >(I would like to be able to only spend a maximum of 25 points into one "power")
Basically, you've seen what I did with the points left, when I said if(pointsVal.value == 0) return; ? You should be able to implement any constraint you like using that.
I modified mine to give an example where the limits are at their initial values.
If you only want to spend a given number of points on one of the powers, you'll have to substract the limit from the current number and return from add() without changing the value if the number exceeds the threshold. That should be pretty easy with what you have now, since you don't have to change the character object to do it.
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I was working trying to generate a random number the other day. The assignment is basically that, given an array with names, I was gonna log names on the console at random. I tried to generate a random number that is gonna help accessing the names working as the index of the elements (e.g., array[random_number_as_index]).
My confusion started when storing the method Math.random() in a variable and accessing that same variable, the result was the exact same number over and over. My line of code looks something like this.
const randomNumber = Math.floor(Math.random()*10));
Whereas when part of a function, e.g.,
function randomNum () {return Math.floor(Math.random()*10));}
would actually generate a random number every time the function is invoked. My expectation was that, upon accessing the variable, a random number was gonna be generated every single time, which was not the case, and only works if it is within a function.
const randomNumber = Math.floor(Math.random()*10));
Generates a random number, then assigns that random number to randomNumber.
randomNumber is a constant variable (meaning its value cannot be changed after the fact).
You're generating one random number, then saving it in a variable.
function randomNum () {return Math.floor(Math.random()*10));}
Defines a function that returns a random number when called.
Each invocation of randomNum generates a new random number.
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I have this code to add elements to my table and that part works perfectly fine. However, I want to add up the values of the last column in order to later print that on another part of the page. parseInt doesn't work for some reason (the values don't come back as integers and stay as strings, is there anything I have done wrong? Again, adding to the table works perfectly fine.
var hourC = 0;
var hourC =+ parseInt($(".hourCount").text(), 10);
alert(hourC);
Edit:
When I print the values of the variable hourC they don't add up to the previous value, they just stay next to each other. Example: 1 + 1 = 11 rather than 2. I don't see where my issue is and the answer for debugging didn't help since I still got the same result.
Final Edit:
I achieved what I wanted now through a different medium, I created an array and pushed the values into the array and then I used "join" to solve the issue.
If interested in what I was asking for here is a fiddle with the final result. (You can just change the console.log to alert)
Basic debugging skills.
parseInt works -- its a well tested function. If it broke in a browser, a lot of people would notice.
However, you haven't given any way to figure out what is going on with your code, since the real problem MUST be here:
$(".hourCount").text()
That must not contain whatever value you think it does.
Split your code up and use the debugger, or even console log, to see what the values are.
var hourC = 0;
var strValue = $(".hourCount").text();
alert(["strValue = ", strValue]);
hourC = parseInt(strValue, 10);
alert(hourC);
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In this exercise, you will roll a pair of dice until the numbers add up to a given number. You can assume that the given number is 2, 3, 6, or 12. Using pseudocode, write an algorithm that returns the number of times the dice is rolled to achieve this number.
I have absolutely no idea how to start doing this. Can you guide me a bit?
Also what does the last sentence mean?
This should get you started. The detail the assignment calls for is likely one or two levels refined from here. For example, what does "roll a die" mean. Probably something to do with saving a random number of some sort to a variable....
define rollRequiredForA(target) {
if target is not an integer or is outside the valid bounds abort
initialize a counter to 0
loop
increase the counter by one
roll two dice
add results together
if the result equals target return counter
end loop
}
First let me address your question about the last sentence of the problem:
I'll break it down in parts.
First pseudocode is a simplification of the steps that you would need to take in solving a problem in a format that is very representative of code but is not actual code written in any programming language. For example pseudocode could be something like this:
if the earlier result is 2 then
use this list: Britney, Caitie, Sierrah
else
use this other list: Brooke, Josh, Zach
Secondly an algorithm is a set of rules to followed in calculating or solving a problem. It's like a formula for solving a problem. Some everyday examples could be:
Driving home: what route should you take? Will there be traffic on the shortest route? If so, will it slow you down more than taking a slightly longer route? These are all questions that would be asked in an algorithm.
Sorting: Typically when you sort something, you do it in a specific way even though you may not realize it such as checking each one and pulling the first out of the pile and putting it on top and then the second and then the third and so on and so forth.
Dividing and conquering: This is another very common algorithm in everyday life.
For more examples check out this quora post
So in other words, the last sentence is asking you to write a simplification of the steps that you would need to take to calculate the amount of rolls of the dice it takes to get those two dice to add up to the given number.
Now that that is out of the way, lets tackle the actual problem
To get you started, you'll have to run some sort of loop (maybe use a do-while loop?), and probably best to do it inside some sort of method. You'll need to have a counter if your dice don't add up to the target roll again and increase the counter until your roll adds up to the target, then return that value of the counter
define rolls needed(target)
initialize counter as 0
initialize sum
do this loop
increase your counter
roll your dice
add results together
while sum does not equal target
return your counter
end
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I have an append statement that adds a single character at a time to a span. (The characters are pulled from a string by treating it like an array: text[i] and such.) I feel like it should be giving me this:
<span id="outputid0">text</span>
But instead it's giving me this:
<span id="outputid0">
"t"
"e"
"x"
"t"
</span>
I guess it makes sense, and this is not a real problem at the moment, but it is a bit awkward-looking and I'm not sure why it's happening. Can anyone explain this one for me?
Edit: Here's a link to JSFiddle, showing an example of what I was talking about. Thank you to ᾠῗᵲᄐᶌ, who seems to have diagnosed and solved the problem just fine without that. If anyone else would like to see it, there it is.
Append adds a child node after the last child node so each character is going to be a text node and that is why they are separated like that
If you want to add a character at a time you're better off taking whats there and concatenating the char to the string that's already there
You can do it like this using jQuery's .text(function(){}) function
// where i = index and v = current text value
$('#outputid0').text(function(i,v){
return v + "your new char";
});
FIDDLE EXAMPLE
If I was a betting man, I'd say you are looping thru an array to generate what you want. Do something like this: Remember, I am only assuming how the data is setup - and only showing for example purposes.
var arr = ['t','e','x','t'];
// just '.join' the array
<span id="outputid0"></span>
// following in script tag
jQuery('#outputid0').text(arr.join(''));
Just to reiterate what Ehsan mentions above. You really need to include your code so there is no 'assuming' or 'guessing' at what you want to accomplish :-)
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I am really in need of this one, because I cann't manually type loads of options for admin panel. Hence I need a quick way to fetch each input/select and add value as I want.
Here's looong sample for one option field:
$("select[name=big_proceed]").val("true");
$("select[name=proceed_action]").val("");
$("input[name=choice_premium]").val("Premium <span>Code</span>");
$("input[name=big_proceed_pts]").val("");
$("#settings_proceed input, #settings_proceed select").each(function () {
databaseData($(this));
});
I thought something like this may work but apparently I was wrong. Here's sample:
$("#settings_proceed :input").each(function () {
$(this)
.eq(0).val("true")
.eq(1).val("")
.eq(2).val("Premium <span>Code</span>")
.eq(3).val("");
databaseData($(this));
});
Any suggestions for me ?
From the jQuery documentation:
.eq(index): Reduce the set of matched elements to the one at the specified index.
Hence your second example doesn't work as intended because $(this) only matches one element (that's the intention behind the .each()). You could rewrite the code like so:
var values = ["true", "", "Premium <span>Code</span>", ""];
$("#settings_proceed :input").each(function(i){
$(this).val(values[i]);
databaseData($(this));
});
However, this approach makes the code hard to read and error-prone because it assumes a fixed order of the HTML elements (what if you change the order of the input fields but forget to adjust the JS accordingly?). So you really should "manually" add IDs to your input elements and select them by their ID and not their index.
As #David Thomas pointed out, some sample HTML would be quite helpful here, but without knowing any further details of what you're trying to do I'd suggest the following:
var values = {
big_proceed: "true",
proceed_action: "",
choice_premium: "Premium <span>Code</span>",
big_proceed_pts: ""
};
$.each(values, function(key, value){
$("#settings_proceed").find("[name='"+key+"']").val(value);
databaseData($(this));
});
That way you can neatly define all the values in one object and let jQuery safely do the rest.