String is the data type for text
You can make a String variable by encasing text in double quotes or single quotes:
var
myString
=
' I like pancakes '
;
var
myString2
=
" with bacon "
;
Stings can simply be added togetter with +.
myString
+
myString2
=
" I like pancakes with bacon"
;
A character in a String can be accessed with an index number(just like an Array).
var
myWord
=
'pancake'
;
myWord
[ 3 ]
=
'c'
;
Play with Strings ......... .... "TryoutPanel1"
<script>
var riddle='What starts with an E and ends with an E and has only one Letter ? ';
var answer=" An Envelope";
function showAnswer(){
document.getElementById("joke").innerHTML= riddle + answer;
}
function showIndex(){
var index=prompt("which index would you like to see?");
document.getElementById("joke").innerHTML= riddle[index];
}
//........make more functions for the string
</script>
<h3 id="joke" ondblclick="showIndex()" title="doubleClick to show index"> What starts with an E and ends with an E and has only one Letter ? </h3>
<button onclick="showAnswer()"> click for the answer</button>
<br>
<br>
<br>
<ul><li>Write functions with String methods: <b>substring()</b>,
<b>indexOf()</b>,<b>concat()</b> etc.(13)</li>
<li>Call them from the <b>onclick</b> handler of a button(17)</li></ul>
The String Object has lots of very handy methods to search or manipulate the String.
Try them all out.
String1 = " "
These are some of the String Class methods. Click on the Methods below to enter them in the tryout Panel.
Enter the necesary parameters. Then click the = button so show the result. Change the String1 value in the input field above
<script>
var word= "pineapple"; // change the word for a new game
var correctNum=0; // amount of correct guessed letters
var errNum=0; // amount of errors
var hangingMan= new Array("/pics/hangman0.gif",
"/pics/hangman1.gif",
"/pics/hangman2.gif",
"/pics/hangman3.gif", // progressive pics to show the hanging man
"/pics/hangman4.gif",
"/pics/hangman5.gif",
"/pics/hangman6.gif",
"/pics/hangman7.gif",
"/pics/hangman8.gif",
"/pics/hangman9.gif",
"/pics/hangman10.gif");
function setOut(){ // draw dashes for each letter of the word
var i;
var line= document.getElementById('dashes');
for(i=0;i<word.length;i++){
var p=document.createElement("p");
p.style.fontSize='35px';
p.style.visibility='visible';
p.style.color='green';
p.style.width='20px';
p.style.display='inline';
p.style.padding='10px';
p.innerHTML='_';
line.appendChild(p);
}
}
function check(){
var answers=document.getElementById('dashes').getElementsByTagName('p');
var letter=document.getElementById("guess").value;
var index=0;
var nextindex=0;
var isFound=false; // boolean that turns true if
// correct letter is guessed
while(index < word.length && !isFound && index!=-1){
index=word.indexOf(letter,nextindex);
if(index!=-1){
isFound=(answers[index].innerHTML=="_"); // check if that letter was still open
nextindex=index+1;
}
}
if(isFound){
answers[index].innerHTML=word.charAt(index); // set correct letter on the correct dash
correctNum+=1; // count on the correct letter
if(correctNum==word.length){ // if all letters are guessed you WIN
document.getElementById("mssg").innerHTML="You Win !!!";
}
}
else{ // wrong answer : change the pict
errNum+=1;
document.getElementById('pic').src=hangingMan[errNum];
if(errNum==10){
document.getElementById("mssg").innerHTML="You Loose !!!";
}
}
}
</script>
<p style="font-size:25px">Hangman Game</p><br><br>
<div id="dashes" style="display:inline"></div><br>
<div >
<img id="pic" src="/pics/hangman0.gif"
style="width:300px;height:300px "/>
</div>
<button onclick="setOut()" >click to get a word</button>
<div><input id="guess" type="text" style="width:30px"/>
<input type="button" value="enter a letter and submit" onclick="check()"/> </div>
<p id="mssg"></p>
