str = 'Write a program that extracts from a given text all palindromes, e.g. "ABBA", "lamal", "exe".';
var strNew = str.match(/\w+/g);
// Output: ["Write", "a", "program", "that", "extracts", "from", "a", "given", "text", "all", "palindromes", "e", "g", "ABBA", "lamal", "exe"]
var R=[/[a-z'\-]+/gi,/[a-z'\-\s]+/gi];
var s=document.getElementById('s');
for(var i=0;i<R.length;i++)
{
var o=document.createElement('option');
o.innerText=R[i]+'';
o.value=i;
s.appendChild(o);
}
var t=document.getElementById('t');
var r=document.getElementById('r');
s.onchange=function()
{
r.innerHTML='';
var x=s.value;
if((x>=0)&&(x<R.length))
x=t.value.match(R[x]);
for(i=0;i<x.length;i++)
{
var li=document.createElement('li');
li.innerText=x[i];
r.appendChild(li);
}
}
<textarea id="t" style="width:70%;height:12em">even, test; spider-man
But saying o'er what I have said before:
My child is yet a stranger in the world;
She hath not seen the change of fourteen years,
Let two more summers wither in their pride,
Ere we may think her ripe to be a bride.
—Shakespeare, William. The Tragedy of Romeo and Juliet</textarea>
<p><select id="s">
<option selected>Select a regular expression</option>
<!-- option value="1">/[a-z'\-]+/gi</option>
<option value="2">/[a-z'\-\s]+/gi</option -->
</select></p>
<ol id="r" style="display:block;width:auto;border:1px inner;overflow:scroll;height:8em;max-height:10em;"></ol>
</div>
function splitMulti(str, tokens){
var tempChar = tokens[0]; // We can use the first token as a temporary join character
for(var i = 1; i < tokens.length; i++){
str = str.split(tokens[i]).join(tempChar);
}
str = str.split(tempChar);
return str;
}
var splitOrig = String.prototype.split; // Maintain a reference to inbuilt fn
String.prototype.split = function (){
if(arguments[0].length > 0){
if(Object.prototype.toString.call(arguments[0]) == "[object Array]" ) { // Check if our separator is an array
return splitMulti(this, arguments[0]); // Call splitMulti
}
}
return splitOrig.apply(this, arguments); // Call original split maintaining context
};
用法:
var a = "a=b,c:d";
a.split(['=', ',', ':']); // ["a", "b", "c", "d"]
// Test to check that the built-in split still works (although our wrapper wouldn't work if it didn't as it depends on it :P)
a.split('='); // ["a", "b,c:d"]
splix = function ()
{
u = [].slice.call(arguments); v = u.slice(1); u = u[0]; w = [u]; x = 0;
for (i = 0; i < u.length; ++i)
{
for (j = 0; j < v.length; ++j)
{
if (u.slice(i, i + v[j].length) == v[j])
{
y = w[x].split(v[j]); w[x] = y[0]; w[++x] = y[1];
};
};
};
return w;
};
console.logg = function ()
{
document.body.innerHTML += "<br>" + [].slice.call(arguments).join();
}
splix = function() {
u = [].slice.call(arguments);
v = u.slice(1);
u = u[0];
w = [u];
x = 0;
console.logg("Processing: <code>" + JSON.stringify(w) + "</code>");
for (i = 0; i < u.length; ++i) {
for (j = 0; j < v.length; ++j) {
console.logg("Processing: <code>[\x22" + u.slice(i, i + v[j].length) + "\x22, \x22" + v[j] + "\x22]</code>");
if (u.slice(i, i + v[j].length) == v[j]) {
y = w[x].split(v[j]);
w[x] = y[0];
w[++x] = y[1];
console.logg("Currently processed: " + JSON.stringify(w) + "\n");
};
};
};
console.logg("Return: <code>" + JSON.stringify(w) + "</code>");
};
setTimeout(function() {
console.clear();
splix("1.23--4", ".", "--");
}, 250);
@import url("http://fonts.googleapis.com/css?family=Roboto");
body {font: 20px Roboto;}
<button onclick="myFunction()">Split with Multiple and Different seperators/delimiters</button>
<p id="demo"></p>
javascript
<script>
function myFunction() {
var str = "How : are | you doing : today?";
var res = str.split(' | ');
var str2 = '';
var i;
for (i = 0; i < res.length; i++) {
str2 += res[i];
if (i != res.length-1) {
str2 += ",";
}
}
var res2 = str2.split(' : ');
//you can add countless options (with or without space)
document.getElementById("demo").innerHTML = res2;
}
</script>
function SplitByString(source, splitBy) {
var splitter = splitBy.split('');
splitter.push([source]); //Push initial value
return splitter.reduceRight(function(accumulator, curValue) {
var k = [];
accumulator.forEach(v => k = [...k, ...v.split(curValue)]);
return k;
});
}
var source = "abc,def#hijk*lmn,opq#rst*uvw,xyz";
var splitBy = ",*#";
console.log(SplitByString(source, splitBy));
var text = "Create a function, that will return an array (of string), with the words inside the text";
println(getWords(text));
function getWords(text)
{
let startWord = -1;
let ar = [];
for(let i = 0; i <= text.length; i++)
{
let c = i < text.length ? text[i] : " ";
if (!isSeparator(c) && startWord < 0)
{
startWord = i;
}
if (isSeparator(c) && startWord >= 0)
{
let word = text.substring(startWord, i);
ar.push(word);
startWord = -1;
}
}
return ar;
}
function isSeparator(c)
{
var separators = [" ", "\t", "\n", "\r", ",", ";", ".", "!", "?", "(", ")"];
return separators.includes(c);
}
var string = 'and this is some kind of information and another text and simple and some egample or red or text';
var separators = ['and', 'or'];
function splitMulti(str, separators){
var tempChar = 't3mp'; //prevent short text separator in split down
//split by regex e.g. \b(or|and)\b
var re = new RegExp('\\b(' + separators.join('|') + ')\\b' , "g");
str = str.replace(re, tempChar).split(tempChar);
// trim & remove empty
return str.map(el => el.trim()).filter(el => el.length > 0);
}
console.log(splitMulti(string, separators))
let splitters = [",", ":", ";"]; // or ",:;".split("");
let start= "a,b;c:d";
let values = splitters.reduce((old, c) => old.map(v => v.split(c)).flat(), [start]);
// values is ["a", "b", "c", "d"]
/**
*
* @param {type} input The string input to be split
* @param {type} includeTokensInOutput If true, the tokens are retained in the splitted output.
* @param {type} tokens The tokens to be employed in splitting the original string.
* @returns {Scanner}
*/
function Scanner(input, includeTokensInOutput, tokens) {
this.input = input;
this.includeTokensInOutput = includeTokensInOutput;
this.tokens = tokens;
}
Scanner.prototype.scan = function () {
var inp = this.input;
var parse = [];
this.tokens.sort(function (a, b) {
return b.length - a.length; //ASC, For Descending order use: b - a
});
for (var i = 0; i < inp.length; i++) {
for (var j = 0; j < this.tokens.length; j++) {
var token = this.tokens[j];
var len = token.length;
if (len > 0 && i + len <= inp.length) {
var portion = inp.substring(i, i + len);
if (portion === token) {
if (i !== 0) {//avoid empty spaces
parse[parse.length] = inp.substring(0, i);
}
if (this.includeTokensInOutput) {
parse[parse.length] = token;
}
inp = inp.substring(i + len);
i = -1;
break;
}
}
}
}
if (inp.length > 0) {
parse[parse.length] = inp;
}
return parse;
};
用法很简单:
var tokens = new Scanner("ABC+DE-GHIJK+LMNOP", false , new Array('+','-')).scan();
console.log(tokens);
给予:
['ABC', 'DE', 'GHIJK', 'LMNOP']
如果您希望在输出中包含拆分令牌(+ and -),请将false设置为true,瞧!它仍然有效。
现在的用法是:
var tokens = new Scanner("ABC+DE-GHIJK+LMNOP", true , new Array('+','-')).scan();