Ny build-in function in VBScript to repeat a string N-times

repeatstringvbscript

There is a function in VBScript String(number,character) returns a string that contains a repeating character of a specified length. E.g.:

String(5, "A")     ' output: "AAAAA"

Is there any function to repeat a string? E.g.:

RepeatString(5, "Ab")     ' output "AbAbAbAbAb"

Best Answer

No, nothing built in. Instead:

n      = 5
str    = "Ab"
result = replace(space(n), " ", str)

Related Solutions

Javascript – endsWith in JavaScript

UPDATE (Nov 24th, 2015):

This answer is originally posted in the year 2010 (SIX years back.) so please take note of these insightful comments:

Shauna -

Update for Googlers - Looks like ECMA6 adds this function. The MDN article also shows a polyfill. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith

T.J. Crowder -

Creating substrings isn't expensive on modern browsers; it may well have been in 2010 when this answer was posted. These days, the simple this.substr(-suffix.length) === suffix approach is fastest on Chrome, the same on IE11 as indexOf, and only 4% slower (fergetaboutit territory) on Firefox: jsperf.com/endswith-stackoverflow/14 And faster across the board when the result is false: jsperf.com/endswith-stackoverflow-when-false Of course, with ES6 adding endsWith, the point is moot. :-)

ORIGINAL ANSWER:

I know this is a year old question... but I need this too and I need it to work cross-browser so... combining everyone's answer and comments and simplifying it a bit:

String.prototype.endsWith = function(suffix) {
    return this.indexOf(suffix, this.length - suffix.length) !== -1;
};

Doesn't create a substring
Uses native indexOf function for fastest results
Skip unnecessary comparisons using the second parameter of indexOf to skip ahead
Works in Internet Explorer
NO Regex complications

Also, if you don't like stuffing things in native data structure's prototypes, here's a standalone version:

function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

EDIT: As noted by @hamish in the comments, if you want to err on the safe side and check if an implementation has already been provided, you can just adds a typeof check like so:

if (typeof String.prototype.endsWith !== 'function') {
    String.prototype.endsWith = function(suffix) {
        return this.indexOf(suffix, this.length - suffix.length) !== -1;
    };
}

C# – Best way to repeat a character in C#

What about this:

string tabs = new string('\t', n);

Where n is the number of times you want to repeat the string.

Or better:

static string Tabs(int n)
{
    return new string('\t', n);
}

Best Answer

Related Solutions

Javascript – endsWith in JavaScript

C# – Best way to repeat a character in C#

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