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Simplifying padLeft() to only allow spaces or zeros for padding. Updated padRight() to mirror padLeft() but without the option to use zeros since that would be an unlikely use case.

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Reinhard Hillefeld
2020-09-11 20:16:43 -04:00
parent ce1d76c7c9
commit 4c5e463e12
1 changed files with 14 additions and 28 deletions
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42
src/compiler/core.ts
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@@ -2252,38 +2252,24 @@ namespace ts {
/**
* Returns 's' left-padded with copies of 'padString' until it reaches the given 'length'.
* If omitted, 'padString' defaults to a single space.
* If 'length' is less than or equal to 's.length' or 'padString' is empty, returns 's' unchanged.
* Returns string left-padded with spaces or zeros until it reaches the given length.
*
* @param s String to pad.
* @param length Final padded length. If less than or equal to 's.length', returns 's' unchanged.
* @param padString Character to use as padding (default " ").
*/
export function padLeft(s: string, length: number, padString = " ") {
if (length <= s.length || padString.length === 0) {
return s;
}
else {
length -= s.length; // how much padding we need
if (length > padString.length) { // need more than one copy of padString
padString += padString.repeat(length / padString.length);
}
return padString.slice(0, length) + s;
}
export function padLeft(s: string, length: number, padString: " " | "0" = " ") {
return length <= s.length ? s : padString.repeat(length - s.length) + s;
}
/**
* Returns 's' right-padded with copies of 'padString' until it reaches the given 'length'.
* If omitted, 'padString' defaults to a single space.
* If 'length' is less than or equal to 's.length' or 'padString' is empty, returns 's' unchanged.
* Returns string right-padded with spaces until it reaches the given length.
*
* @param s String to pad.
* @param length Final padded length. If less than or equal to 's.length', returns 's' unchanged.
* @param padString Character to use as padding (default " ").
*/
export function padRight(s: string, length: number, padString = " ") {
if (length <= s.length || padString.length === 0) {
return s;
}
else {
length -= s.length;
if (length > padString.length) { // need more than one copy of padString
padString += padString.repeat(length / padString.length);
}
return s + padString.slice(0, length);
}
export function padRight(s: string, length: number, padString: " " = " ") {
return length <= s.length ? s : s + padString.repeat(length - s.length);
}
}