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Can be accessed at:
https://jsperf.app/negative-modulo/2
Trim function
<script>
/*
mytrim() uses native function if it is available and can trim all required whitespace chars, otherwise it uses custom function.
because of slow native trim of chrome and chromium, custom function is used in them.
*/
if (!String.prototype.trim || "\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF".trim() || navigator.userAgent.toString().toLowerCase().indexOf("chrome") != -1)
var mytrim = function(str) {
var c;
for (var i = 0; i < str.length; i++) {
c = str.charCodeAt(i);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
for (var j = str.length - 1; j >= i; j--) {
c = str.charCodeAt(j);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
return str.substring(i, j + 1);
};
else var mytrim = function(str) {
return str.trim();
}
var mytrim_plain = function(str) {
var c;
for (var i = 0; i < str.length; i++) {
c = str.charCodeAt(i);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
for (var j = str.length - 1; j >= i; j--) {
c = str.charCodeAt(j);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
return str.substring(i, j + 1);
};
var mytrim_plain2opt=function(d){
for(var a,b=d.length,c=0;c<b&&(a=d.charCodeAt(c),32==a||10==a||13==a||9==a||12==a||11==a||160==a||5760==a||6158==a||8192==a||8193==a||8194==a||8195==a||8196==a||8197==a||8198==a||8199==a||8200==a||8201==a||8202==a||8232==a||8233==a||8239==a||8287==a||12288==a||65279==a);c++);
for(--b;b>=c&&(a=d.charCodeAt(b),32==a||10==a||13==a||9==a||12==a||11==a||160==a||5760==a||6158==a||8192==a||8193==a||8194==a||8195==a||8196==a||8197==a||8198==a||8199==a||8200==a||8201==a||8202==a||8232==a||8233==a||8239==a||8287==a||12288==a||65279==a);b--);
return d.substring(c,b+1)};
var mytrim_plain2 = function(str) {
var c, l=str.length;
for (var i=0;i<l;i++) {
c=str.charCodeAt(i);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
for(var j=l-1;j>=i;j--){
c=str.charCodeAt(j);
if (c == 32 || c == 10 || c == 13 || c == 9 || c == 12 || c == 11 || c == 160 || c == 5760 || c == 6158 || c == 8192 || c == 8193 || c == 8194 || c == 8195 || c == 8196 || c == 8197 || c == 8198 || c == 8199 || c == 8200 || c == 8201 || c == 8202 || c == 8232 || c == 8233 || c == 8239 || c == 8287 || c == 12288 || c == 65279) continue;
else break;
}
return str.substring(i,j+1);
};
function trim0(str) { return str.replace(/^(\s*)/, '').replace(/\s*$/, ''); }
function trim1(str) { return str.replace(/^\s\s*/, '').replace(/\s\s*$/, ''); }
function trim2(str) { return str.replace(/^\s+/, '').replace(/\s+$/, ''); }
function trim3(str) { return str.substring(Math.max(str.search(/\S/), 0), str.search(/\S\s*$/) + 1); }
function trim4(str) { return str.replace(/^\s+|\s+$/g, ''); }
function trim5(s) {
var str = s.match(/\S+(?:\s+\S+)*/);
return str ? str[0] : '';
}
function trim6(str) { return str.replace(/^\s*(\S*(\s+\S+)*)\s*$/, '$1'); }
function trim7(str) { return str.replace(/^\s*(\S*(?:\s+\S+)*)\s*$/, '$1'); }
function trim8(str) { return str.replace(/^\s*((?:[\S\s]*\S)?)\s*$/, '$1'); }
function trim9(str) { return str.replace(/^\s*([\S\s]*?)\s*$/, '$1'); }
var trim10_whitespace = ' \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
function trim10(s) {
var str = s;
for (var i = 0; i < str.length; i++) {
if (trim10_whitespace.indexOf(str.charAt(i)) === -1) {
str = str.substring(i);
break;
}
}
for (i = str.length - 1; i >= 0; i--) {
if (trim10_whitespace.indexOf(str.charAt(i)) === -1) {
str = str.substring(0, i + 1);
break;
}
}
return trim10_whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}
function trim11(s) {
var str = s.replace(/^\s+/, '');
for (var i = str.length - 1; i >= 0; i--) {
if (/\S/.test(str.charAt(i))) {
str = str.substring(0, i + 1);
break;
}
}
return str;
}
function trim12(s) {
var str = s.replace(/^\s\s*/, ""),
ws = /\s/,
i = str.length;
while (ws.test(str.charAt(--i)));
return str.slice(0, i + 1);
}
// trim12 with \s+ insteas od \s\s*
function trim13(s) {
var str = s.replace(/^\s+/, ""),
ws = /\s/,
i = str.length;
while (ws.test(str.charAt(--i)));
return str.slice(0, i + 1);
}
// trim12 without single ws=/\s/
function trim14(s) {
var str = s.replace(/^\s\s*/, ""),
i = str.length;
while (/\s/.test(str.charAt(--i)));
return str.slice(0, i + 1);
}
// same as trim11, but > not >=
// buggy for "a " in Chromium
function trim15(str) {
str = str.replace(/^\s+/, '');
for (var i = str.length - 1; i > 0; i--) {
if (/\S/.test(str.charAt(i))) {
str = str.substring(0, i + 1);
break;
}
}
return str;
}
trim15.buggy = true;
// trim12 on http://zanstra.com/base/blog/trim_mac_roundup
var trim16_whitespace = ' \n\r\t\v\f\u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
function trim16(s) {
var i = 0, j = s.length-1;
while(i < s.length && trim16_whitespace.indexOf(s.charAt(i)) != -1)
i++;
while(j > i && trim16_whitespace.indexOf(s.charAt(j)) != -1)
j--;
return s.substring(i,j+1);
}
// trim12 in http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-13585
// looks to be buggy in Opera and Chromium. Works ok in Epiphany.
// buggy for " ala ma " in Chromium
// buggy for "ala ma " in Chromium
function trim17(str) {
var str1 = str.replace(/^\s\s*/, '');
var len = str1.length;
if (len && /\s/.test(str1.charAt(len-1))) {
var re = /.*\S/g;
re.test(str1);
str1 = str1.slice(0, re.lastIndex);
}
return str1;
}
trim17.buggy=true;
// trim in http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-39371
// slightly changed return
//var trim18_whitespace = trim21_whitespace;
function trim18(str) {
var len = str.length;
if (len) {
while (trim21_whitespace[str.charCodeAt(--len)]);
if (++len) {
var i = 0;
while (trim21_whitespace[str.charCodeAt(i)]) {
++i;
}
}
return str.substring(i, len);
}
return str;
}
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-21439
function trim19 (str) {
var ws = /\s/, _start = 0, end = str.length;
while(ws.test(str.charAt(_start++)));
while(ws.test(str.charAt(--end)));
return str.slice(_start - 1, end + 1);
}
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-28776
function trim20(str) {
var whitespace = " \n\r\t\f";
for (var i = 0; i < str.length; i++)
if (whitespace.indexOf(str.charAt(i)) < 0)
break;
for (var j = str.length - 1; j >= i; j-- )
if (whitespace.indexOf(str.charAt(j)) < 0)
break;
return str.substring(i, j+1);
}
// in original it was manually populated, but looping is nicer
var trim21_whitespace = {};
var trim21_ww = [
0x0009,0x000a,0x000b,0x000c,0x000d,0x0020,0x0085,0x00a0,0x1680,0x180e,0x2000,0x2001,0x2002,0x2003,0x2004,0x2005,
0x2006,0x2007,0x2008,0x2009,0x200a,0x200b,0x2028,0x2029,0x202f,0x205f,0x3000
];
for (var i = 0; i < trim21_ww.length; i++) {
trim21_whitespace[trim21_ww[i]] = true;
}
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-25052
// looks to be buggy as it returns different results than others in Epiphany, Chromium (correct in Opera)
// bug for " a"
// buggy for ' 40. To no one will we sell.' in Chromium
function trim21(str) {
var n = str.length;
var s = trim21_whitespace;
var i;
if (!n) return str;
if (n && s[str.charCodeAt(n-1)]) {
do {
--n;
} while (n && s[str.charCodeAt(n-1)]);
if (n && s[str.charCodeAt(0)]) {
i = 1;
while (i < n && s[str.charCodeAt(i)])
++i;
}
return str.substring(i, n);
}
if (n && s[str.charCodeAt(0)]) {
i = 1;
while (i < n && s[str.charAt(i)])
++i;
return str.substring(i, n);
}
return str;
};
trim21.buggy=true;
// rialto framework, http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-25038
// VERY looks to be buggy as it returns different results than others in Epiphany, Chromium, Opera (in Opera even differently)
// bug for " ", ' 40. To no one. ', '40. To no one. '
function trim22(str) {
return str.replace(/^\s*(\b.*\b|)\s*$/, '$1');
}
trim22.buggy=true;
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-13585
// slightly moded return
// looks to be buggy in Chromium (correct in Opera and Epiphany)
// buggy for " ala ma " in Chromium
// buggy for "ala ma " in Chromium
function trim23(s) {
var str = s.replace(/^\s\s*/, ''),
len = str.length;
if (len && /\s/.test(str.charAt(len-1))) {
var re = /.*\S/g;
re.test(str);
return str.slice(0, re.lastIndex);
} else {
return str;
}
}
trim23.buggy=true;
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-6808
this.trim24 = (function(){
var ws = {},
chars = ' \n\r\t\v\f\u00a0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';
for(var i = 0; i < chars.length; i++ )
ws[chars.charAt(i)] = true;
return function( str ){
var s = -1,
e = str.length;
while( ws[str.charAt(--e)] );
while( s++ !== e && ws[str.charAt(s)] );
return str.substring( s, e+1 );
};
})();
// http://blog.stevenlevithan.com/archives/faster-trim-javascript#comment-6169
function trim25(s) {
var str = s.replace(/^\s+/, '');
for (var i = str.length; i--;)
if (/\S/.test(str.charAt(i)))
return str.substring(0, ++i)
return str
}
// bug for " s"
function trim26(str) {
return str.replace(/^\s*(\S.*\S)?\s*$/, '$1');
}
trim26.buggy=true;
function trim_native(str) {
return str.trim(); // should throw is no such function
}
var inp = " \n\n \n\n a \n a\n a\n a\n a \n\t\ta\t\ta\njahsdkjahkjshdakjhsdkahskd akhsjdh akjshd kashdkajhsd kajshd \nkauyiuqhwep iasldk qpwoie ad \n askdjaslkdjaslkjdaoiur qowioqwhr aspodiquw ijasod iqwiue pqowipoqiw epoqiwpeo iaslkjdqur \t kjahsdkj hakshd\nkajhdk\nk as d \t\n".split('\n');
function e(f) {
var x = [];
for (i = 0; i < inp.length; i++) {
x.push(f(inp[i]));
}
return x;
}
</script>Ready to run.
| Test | Ops/sec | |
|---|---|---|
| trim1 | | ready |
| trim2 | | ready |
| trim3 | | ready |
| trim4 | | ready |
| trim5 | | ready |
| trim6 | | ready |
| trim7 | | ready |
| trim8 | | ready |
| trim9 | | ready |
| trim10 | | ready |
| trim11 | | ready |
| trim12 | | ready |
| trim13 | | ready |
| trim14 | | ready |
| trim15 | | ready |
| trim16 | | ready |
| trim17 | | ready |
| trim18 | | ready |
| trim19 | | ready |
| trim20 | | ready |
| trim21 | | ready |
| trim22 | | ready |
| trim23 | | ready |
| trim0 | | ready |
| trim-native | | ready |
| mytrim | | ready |
| mytrim_plain | | ready |
| mytrim_plain2 | | ready |
| mytrim_plain2opt | | ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.