根據一條線:
s = "Test abc test test abc test test test abc test test abc";
这似乎只是在上面的行中删除ABC的第一次出现:
s = s.replace('abc', '');
如何替代所有事件?
根據一條線:
s = "Test abc test test abc test test test abc test test abc";
这似乎只是在上面的行中删除ABC的第一次出现:
s = s.replace('abc', '');
如何替代所有事件?
当前回答
就像上面的分裂/合并解决方案一样,下面的解决方案与逃避字符没有任何问题,与常规表达方法不同。
function replaceAll(s, find, repl, caseOff, byChar) {
if (arguments.length<2)
return false;
var destDel = ! repl; // If destDel delete all keys from target
var isString = !! byChar; // If byChar, replace set of characters
if (typeof find !== typeof repl && ! destDel)
return false;
if (isString && (typeof find !== "string"))
return false;
if (! isString && (typeof find === "string")) {
return s.split(find).join(destDel ? "" : repl);
}
if ((! isString) && (! Array.isArray(find) ||
(! Array.isArray(repl) && ! destDel)))
return false;
// If destOne replace all strings/characters by just one element
var destOne = destDel ? false : (repl.length === 1);
// Generally source and destination should have the same size
if (! destOne && ! destDel && find.length !== repl.length)
return false
var prox, sUp, findUp, i, done;
if (caseOff) { // Case insensitive
// Working with uppercase keys and target
sUp = s.toUpperCase();
if (isString)
findUp = find.toUpperCase()
else
findUp = find.map(function(el) {
return el.toUpperCase();
});
}
else { // Case sensitive
sUp = s;
findUp = find.slice(); // Clone array/string
}
done = new Array(find.length); // Size: number of keys
done.fill(null);
var pos = 0; // Initial position in target s
var r = ""; // Initial result
var aux, winner;
while (pos < s.length) { // Scanning the target
prox = Number.MAX_SAFE_INTEGER;
winner = -1; // No winner at the start
for (i=0; i<findUp.length; i++) // Find next occurence for each string
if (done[i]!==-1) { // Key still alive
// Never search for the word/char or is over?
if (done[i] === null || done[i] < pos) {
aux = sUp.indexOf(findUp[i], pos);
done[i] = aux; // Save the next occurrence
}
else
aux = done[i] // Restore the position of last search
if (aux < prox && aux !== -1) { // If next occurrence is minimum
winner = i; // Save it
prox = aux;
}
} // Not done
if (winner === -1) { // No matches forward
r += s.slice(pos);
break;
} // No winner
// Found the character or string key in the target
i = winner; // Restore the winner
r += s.slice(pos, prox); // Update piece before the match
// Append the replacement in target
if (! destDel)
r += repl[destOne ? 0 : i];
pos = prox + (isString ? 1 : findUp[i].length); // Go after match
} // Loop
return r; // Return the resulting string
}
文档如下:
替代All Syntax ====== 替代All(s, find, [repl, caseOff, byChar) 参数 ==========“s” 是替代序列的目标. “find” 可以是序列或序列的序列. “repl” 应该是相同的类型“find” 或空的 如果“find” 是序列,它是一个简单的替代所有“find” 事件在“s” 由序列“repl” 如果“find” 是序列,它将取代
function l() {
return console.log.apply(null, arguments);
}
var k = 0;
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
["ri", "nea"], ["do", "fa"])); // 1
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
["ri", "nea"], ["do"])); // 2
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
["ri", "nea"])); // 3
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
"aeiou", "", "", true)); // 4
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
"aeiou", "a", "", true)); // 5
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
"aeiou", "uoiea", "", true)); // 6
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
"aeiou", "uoi", "", true)); // 7
l(++k, replaceAll("banana is a ripe fruit harvested near the river",
["ri", "nea"], ["do", "fa", "leg"])); // 8
l(++k, replaceAll("BANANA IS A RIPE FRUIT HARVESTED NEAR THE RIVER",
["ri", "nea"], ["do", "fa"])); // 9
l(++k, replaceAll("BANANA IS A RIPE FRUIT HARVESTED NEAR THE RIVER",
["ri", "nea"], ["do", "fa"], true)); // 10
return;
其他回答
2020年8月
不再有常见的表达式
const str = “测试 abc 测试 abc 测试 abc 测试 abc”; const modifiedStr = str.replaceAll('abc', ''); console.log(modifiedStr);
https://developer.mozilla.org/en-US/docs/Web/JavaScript/参考/Global_Objects/String/replaceAll
我使用分割和加入或这个功能:
function replaceAll(text, busca, reemplaza) {
while (text.toString().indexOf(busca) != -1)
text = text.toString().replace(busca, reemplaza);
return text;
}
所有答案都被接受,你可以以多种方式做到这一点。
const str = “测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试测试
var str = "ff ff f f a de def";
str = str.replace(/f/g,'');
alert(str);
HTTP://jsfiddle.net/ANHR9/
看看这个答案,也许它会帮助,我在我的项目中使用它。
function replaceAll(searchString, replaceString, str) {
return str.split(searchString).join(replaceString);
}
replaceAll('abc', '',"Test abc test test abc test test test abc test test abc" ); // "Test test test test test test test test "