git reset --hard <tag/branch/commit id>
Notes:
git reset without the --hard option resets the commit history, but not the files. With the --hard option the files in working tree are also reset. (credited user)
The java objects instantiated for JSP Custom Tags can now be pooled and reused. This significantly boosts the performance of JSP pages which use custom tags.
That page also says that web.xml can contain an "enablePooling" option for that, and that its default value is true.
After the doEndTag invocation, the tag handler is available for further invocations (and it is expected to have retained its properties).
So what I do is reset all local variables to their default value just before doEndTag() returns
// create the JAXP XPath evaluation environment.
XPath xpath = XPathFactory.newInstance().newXPath();
// creat an xpath expression. This example select all nodes with the
// name 'link' from the root of the document.
String expression = "//link";
// get a list of nodes using the xpath environment, DOM Document and the
// XPath expression. Specify the type of node that is retrived (in this
// case its a NODESET which is a list of nodes)
NodeList linkNodes = (NodeList) xpath.evaluate(expression, bbcDoc, XPathConstants.NODESET);
for (int i = 0; i < linkNodes.getLength(); i++) {
// System.out.println(linkNodes.item(i).getTextContent());
}
Hibernate allows you to create types and override the fetching/saving metods of the types.
Create a type, e.g., InsertableOnly, which on the fetch sets throws away the database value.
Assuming your value is an Integer because you represent prices in cents to avoid rounding issues:
class InsertOnlyInteger extends org.hibernate.type.IntegerType {
public Object get(ResultSet rs, String name) throws SQLException {
return null;
}
}
Then make the Hibernate type of the attribute InsertOnlyInteger (with xml or annotation, as it suits you).
// Set up the environment for creating the initial context Hashtable<String, Object> env = new Hashtable<String, Object>(); env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory"); env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial"); // Authenticate as S. User and password "mysecret" env.put(Context.SECURITY_AUTHENTICATION, "simple"); env.put(Context.SECURITY_PRINCIPAL, "cn=S. User, ou=NewHires, o=JNDITutorial"); env.put(Context.SECURITY_CREDENTIALS, "mysecret"); // Create the initial context DirContext ctx = new InitialDirContext(env); // ... do something useful with ctx
The log file containing the information referenced will usually be the one named with the hostname on which Tomcat is running. On a simple server (e.g. development environment) this is localhost.<datestamp>.log
Die Software der Bundestagwahl ist unsicher, Ergebnisse können gefälscht werden. Das haben Fachleute ZEIT ONLINE demonstriert. Bundeswahlleiter und BSI sind alarmiert.
assigning the values of instance variable initializers to the corresponding instance variables, in the left-to-right order in which they appear textually in the source code
When you pipe the output, ls acts differently.
This fact is hidden away in the info documentation:
If standard output is a terminal, the output is in columns (sorted vertically) and control characters are output as question marks; otherwise, the output is listed one per line and control characters are output as-is.
To prove it, try running
ls
and then
ls | less
In neo4j-shell you can
list legacy indices with index --indexes
list all label indices and constraints with schema
list indices and constraints for specific label with schema ls -l :YourLabel
In neo4j-browser you can
list all label indices and constraints with :schema
list indices and constraints for specific label with :schema ls -l :YourLabel
Definition 4: This value: in JavaScript this value is dynamically scoped, unless used in an arrow function.
That’s correct: as we know, the value of this is determined and provided exactly by the caller.
function produce() {
console.log(this.x);
}
const alpha = {produce, x: 1};
const beta = {produce, x: 2};
const gamma = {produce, x: 3};
console.log(
alpha.produce(), // 1
beta.produce(), // 2
gamma.produce(), // 3
);
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
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