如何在Javascript中进行部分字符串匹配?
例如,匹配“Alf”
- 'Alfred' -> true - 'Alf' -> true - 'alf' -> true - 'al' -> true - 'altered' -> false - 'half' -> false - '' -> false - 'bob' -> false
例如,匹配“Alf”
- 'Alfred' -> true - 'Alf' -> true - 'alf' -> true - 'al' -> true - 'altered' -> false - 'half' -> false - '' -> false - 'bob' -> false
https://jsfiddle.net/zbzc5tqe/1/
我希望在编程中能更少使用JavaScript内置函数。var arr = ['Alfred', 'Alf', 'alf', 'al', 'altered', 'half', '', 'bob'];
arr.forEach(function(element) {
add(element + "->" + matches(element, 'Alf'));
});
function ignoreCase(s1, s2) {
var needleRegExp = new RegExp('^' + s2 + "$", "i");
return needleRegExp.test(s1)
}
function partializer(string) {
var out = [];
for (var i = 1; i < string.length; i++) {
out.push(string.slice(0, i));
}
return out;
}
function matches(text, partial) {
var parts = partializer(partial);
for (var i = 0; i < parts.length; i++) {
if (startsWith(text, parts[i])) {
return true;
}
}
return false;
}
function startsWith(text, element) {
var s2 = text.split(0, element.length - 1);
return ignoreCase(element, s2);
}
function add(text) {
var olList = document.getElementById('list');
var newListItem = document.createElement('li');
newListItem.innerText = text;
olList.appendChild(newListItem);
}
<ol id="list">
</ol>