{
"schema": {
"type": "struct",
"fields": [
{
"type": "struct",
"fields": [
{
"type": "string",
"optional": false,
"field": "Id"
},
{
"type": "string",
"optional": false,
"field": "UserId"
},
{
"type": "string",
"optional": false,
"field": "RoleId"
},
{
"type": "string",
"optional": true,
"field": "APPID"
},
{
"type": "int32",
"optional": false,
"default": 0,
"field": "IsDeleted"
},
{
"type": "int64",
"optional": false,
"name": "io.debezium.time.Timestamp",
"version": 1,
"default": 0,
"field": "ctime"
},
{
"type": "int64",
"optional": false,
"name": "io.debezium.time.Timestamp",
"version": 1,
"default": 0,
"field": "utime"
}
],
"optional": true,
"name": "local3910472223.br_auths.auths_user_roles.Value",
"field": "before"
},
{
"type": "struct",
"fields": [
{
"type": "string",
"optional": false,
"field": "Id"
},
{
"type": "string",
"optional": false,
"field": "UserId"
},
{
"type": "string",
"optional": false,
"field": "RoleId"
},
{
"type": "string",
"optional": true,
"field": "APPID"
},
{
"type": "int32",
"optional": false,
"default": 0,
"field": "IsDeleted"
},
{
"type": "int64",
"optional": false,
"name": "io.debezium.time.Timestamp",
"version": 1,
"default": 0,
"field": "ctime"
},
{
"type": "int64",
"optional": false,
"name": "io.debezium.time.Timestamp",
"version": 1,
"default": 0,
"field": "utime"
}
],
"optional": true,
"name": "local3910472223.br_auths.auths_user_roles.Value",
"field": "after"
},
{
"type": "struct",
"fields": [
{
"type": "string",
"optional": true,
"field": "version"
},
{
"type": "string",
"optional": false,
"field": "name"
},
{
"type": "int64",
"optional": false,
"field": "server_id"
},
{
"type": "int64",
"optional": false,
"field": "ts_sec"
},
{
"type": "string",
"optional": true,
"field": "gtid"
},
{
"type": "string",
"optional": false,
"field": "file"
},
{
"type": "int64",
"optional": false,
"field": "pos"
},
{
"type": "int32",
"optional": false,
"field": "row"
},
{
"type": "boolean",
"optional": true,
"default": false,
"field": "snapshot"
},
{
"type": "int64",
"optional": true,
"field": "thread"
},
{
"type": "string",
"optional": true,
"field": "db"
},
{
"type": "string",
"optional": true,
"field": "table"
},
{
"type": "string",
"optional": true,
"field": "query"
}
],
"optional": false,
"name": "io.debezium.connector.mysql.Source",
"field": "source"
},
{
"type": "string",
"optional": false,
"field": "op"
},
{
"type": "int64",
"optional": true,
"field": "ts_ms"
}
],
"optional": false,
"name": "local3910472223.br_auths.auths_user_roles.Envelope"
},
"payload": {
"before": null,
"after": {
"Id": "DB4DA841364860D112C3C76BDCB36635",
"UserId": "0000000000",
"RoleId": "5b7e5f9b4bc00d89c4cf96ae",
"APPID": "br.region2",
"IsDeleted": 0,
"ctime": 1550138524000,
"utime": 1550138524000
},
"source": {
"version": "0.8.3.Final",
"name": "local3910472223",
"server_id": 0,
"ts_sec": 0,
"gtid": null,
"file": "mysql-bin.000003",
"pos": 64606,
"row": 0,
"snapshot": true,
"thread": null,
"db": "br_auths",
"table": "auths_user_roles",
"query": null
},
"op": "c",
"ts_ms": 1550568556614
}
}
返回一个空列表re.findall(r'[^-](-*)$', '----')。
同时，[]返回带有空字符串re.findall(r'[^-](-*)$', '----343')的列表。
在两种情况下均不匹配。为什么re.findall（）在第一种情况下返回一个空列表，而在第二种情况下返回一个带有空字符串的列表？
答案 0 :(得分：1)
$与该行的末尾匹配，该末尾有零个字符。在第一种情况下，没有匹配项，因为该行的末尾是破折号（-），而您已将其与[^-]取反。在第二行中，该行的末尾是与正则表达式匹配的非破折号字符。
答案 1 :(得分：1)
之所以这样做，是因为当您说public function aggiungiDocumento(){
$nomeFile = $this->input->post('nomeFile');
echo $nomeFile;
$document = $_FILES['document']['name'];
echo $document;
if($document=''){
}
else {
echo getcwd() . "\n";
$config['upload_path']='./aziende';
echo $config['upload_path'];
$config['allowed_types']='jpg|gif|png';
//new file name process
$tmp = explode('.', $document);
$ext = end($tmp);
$config['file_name'] = $nomeFile.$ext;
$this->load->library('upload', $config);
if(!$this->upload->do_upload('document')){
echo "nope";
}
else{
echo "yup";
$config['file_name'] = $nomeFile;
echo $config['file_name'];
$document=$this->upload->data('file_name');
}
}
时，您匹配的是零或出现的(-*)，只要这些连字符后面跟随的字符不是{{1} }。在第一个示例中，没有不属于-的字符，因此没有匹配项，因此为空列表。在第二个示例中，有三个不是连字符的字符（数字），因此-与最后一个-匹配，后跟(-*)的零出现。