Question

例如：

“10.0.cm”转到“10.0”

和

“10.0.m”转到“10.0”

和

“3”保持为“3”

等...

我试过了：

values[3].replace(/[^0-9.,]+/, '')

但这仍然留下了“。”在数字之后，例如：10.0。

感谢您的帮助......

Answer 1

var values = ["10.0.cm", "10.0.m", "3"];
var patten = /\d+(\.\d+)?/g;
for (var i = 0; i < values.length; i++) {
    console.info(values[i].match(patten));
}

Answer 2

以下正则表达式应该解决它

- (NSURLSessionTask *) startUploadTaskForURL: (NSURL *) url withData: (NSData *) data {
  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
  [request setHTTPMethod:@"POST"];
  [request addValue:@"multipart/form-data" forHTTPHeaderField:@"Content-Type"];
  NSURLSessionUploadTask uploadTask = [self.session uploadTaskWithRequest:request fromData:data];
  [self scheduleTask:task];
  return task;
}

- (void) scheduleTask: (NSURLSessionTask *) task {
    [self.runningTasks setObject:[NSMutableData data] forKey:task];
    [task resume];
}

- (NSMutableData *) dataForTask: (NSURLSessionTask *) task {
    return [self.runningTasks objectForKey:task];
}

- (void) URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
    NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"HTTPClient: Data task received data: %@", dataString);
    NSMutableData *runningData = [self dataForTask:dataTask];
    if (!runningData) {
        NSLog(@"No data found for task");
    }
    [runningData appendData: data];
}

- (void) URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {
    NSLog(@"HTTPClient: Task completed with error: %@", error);
    // my client also works with a delegate, so as to make it reusable
    [self.delegate sessionTask:task completedWithError:error data:[self dataForTask:task]];
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend {
    NSLog(@"HTTPClient: did send body data: %lld of %lld bytes ", totalBytesSent, totalBytesExpectedToSend);
}

Answer 3

您所描述的问题不是简单的“在字符串中查找数字”

一步完成此操作并不容易，因为 JavaScript 中的 RegExp 不支持回溯。然而

删除所有非数字或.
在 String
构建 String

var str = 'foo_1.0.bar.1.2.xyz';

str = str.replace(/[^\d\.]/g, '').split('.');
str = str[0] ? str[0] + '.' + str.slice(1).join('') : '';

str; // "1.012"

javascript字符串：删除除数字以外的所有内容和第一个“。”

3 个答案: