monaco-editor
Version:
A browser based code editor
65 lines • 1.86 kB
JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
;
export function startsWith(haystack, needle) {
if (haystack.length < needle.length) {
return false;
}
for (var i = 0; i < needle.length; i++) {
if (haystack[i] !== needle[i]) {
return false;
}
}
return true;
}
/**
* Determines if haystack ends with needle.
*/
export function endsWith(haystack, needle) {
var diff = haystack.length - needle.length;
if (diff > 0) {
return haystack.lastIndexOf(needle) === diff;
}
else if (diff === 0) {
return haystack === needle;
}
else {
return false;
}
}
/**
* @returns the length of the common prefix of the two strings.
*/
export function commonPrefixLength(a, b) {
var i, len = Math.min(a.length, b.length);
for (i = 0; i < len; i++) {
if (a.charCodeAt(i) !== b.charCodeAt(i)) {
return i;
}
}
return len;
}
export function repeat(value, count) {
var s = '';
while (count > 0) {
if ((count & 1) === 1) {
s += value;
}
value += value;
count = count >>> 1;
}
return s;
}
var _a = 'a'.charCodeAt(0);
var _z = 'z'.charCodeAt(0);
var _A = 'A'.charCodeAt(0);
var _Z = 'Z'.charCodeAt(0);
var _0 = '0'.charCodeAt(0);
var _9 = '9'.charCodeAt(0);
export function isLetterOrDigit(text, index) {
var c = text.charCodeAt(index);
return (_a <= c && c <= _z) || (_A <= c && c <= _Z) || (_0 <= c && c <= _9);
}
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