大约有 1,300 项符合查询结果（耗时：0.0181秒） [XML]
How can I drop all the tables in a PostgreSQL database?
...SCHEMA public CASCADE;
CREATE SCHEMA public;
If you are using PostgreSQL 9.3 or greater, you may also need to restore the default grants.
GRANT ALL ON SCHEMA public TO postgres;
GRANT ALL ON SCHEMA public TO public;
shar...
How to list all Git tags?
...u can also search for tags that match a particular pattern.
$ git tag -l "v1.8.5*"
v1.8.5
v1.8.5-rc0
v1.8.5-rc1
v1.8.5-rc2
Getting latest tag on git repository
The command finds the most recent tag that is reachable from a commit. If the tag points to the commit, then only the tag is shown. Othe...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...恢复又恢复不了。
Non-Voting：没有选举权的secondary节点，纯粹的备份数据节点。
到此整个mongodb副本集搞定了两个问题：
主节点挂了能否自动切换连接？目前需要手工切换。
主节点的读写压力过大如何解决？
还有这两个...
How to hash a password
.../ Format hash with extra information
return string.Format("$MYHASH$V1${0}${1}", iterations, base64Hash);
}
/// <summary>
/// Creates a hash from a password with 10000 iterations
/// </summary>
/// <param name="password">The password.</param>
/...
How to test equality of Swift enums with associated values
...ase (.none, .none):
return true
case let (.simple(v0), .simple(v1)):
return v0 == v1
case let (.advanced(x0, y0), .advanced(x1, y1)):
return x0 == x1 && y0 == y1
default:
return false
}
}
...
Convert a row of a data frame to vector
...eful if your row contains a factor. Here is an example:
df_1 = data.frame(V1 = factor(11:15),
V2 = 21:25)
df_1[1,] %>% as.numeric() # you expect 11 21 but it returns
[1] 1 21
Here is another example (by default data.frame() converts characters to factors)
df_2 = data.frame...
Multiple left-hand assignment with JavaScript
...time, you could still break up the definition from the assignment. So: var v1, v2, v3; Then later on: v1 = v2 = v3 = 6; They'll still be in local scope. Since David mentioned alerts, this would work as expected (if pre-var'd): alert(v1 = v2 = v3 = 6);
– ShawnFumo
...
Random Gaussian Variables
...e;
return _storedDeviate*sigma + mu;
}
double v1, v2, rSquared;
do
{
// two random values between -1.0 and 1.0
v1 = 2*_random.NextDouble() - 1;
v2 = 2*_random.NextDouble() - 1;
rSquared = v1*v1 + v2*v2;
...
Google Maps: how to get country, state/province/region, city given a lat/long value?
...ata.results[0];
var county, city;
$.each(loc1, function(k1,v1) {
if (k1 == "address_components") {
for (var i = 0; i < v1.length; i++) {
for (k2 in v1[i]) {
if (k2 == "types") {
var types = v...
PDO Prepared Inserts multiple rows in single query
...wo possible approaches:
$stmt = $pdo->prepare('INSERT INTO foo VALUES(:v1_1, :v1_2, :v1_3),
(:v2_1, :v2_2, :v2_3),
(:v2_1, :v2_2, :v2_3)');
$stmt->bindValue(':v1_1', $data[0][0]);
$stmt->bindValue(':v1_2', $data[0][1]);
$stmt->bindValue(':v1_3', $data[0][2]);
// etc...
$stmt->...