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How to define two fields “unique” as couple
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f2201598%2fhow-to-define-two-fields-unique-as-couple%23new-answer', 'question_page');
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...
How many constructor arguments is too many?
... String ssn;
public static CustomerBuilder customer() {
return new CustomerBuilder();
}
public CustomerBuilder withSurname(String surname) {
this.surname = surname;
return this;
}
public CustomerBuilder withFirstName(String firstName) {
this.firs...
How do I delete an exported environment variable?
...tomatically every time you open terminal, try looking through the various hidden files in your home directory for it. Or, to see where it is being set, try "grep -r <X> ~" where <X> is the name of the variable. This may take a while if you have a lot of files in your home directory.
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PHP - Get bool to echo false when false
... and PHP.
– Charlie
Dec 15 '16 at 2:51
add a comment
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ExecJS::RuntimeError on Windows trying to follow rubytutorial
...ing. Find the section that starts with the line JScript = ExternalRuntime.new(. In that section, on the line containing :command => "cscript //E:jscript //Nologo //U", - remove the //U only. Then on the line containing :encoding => 'UTF-16LE' # CScript with //U returns UTF-16LE - chan...
How to append to a file in Node?
...
For occasional appends, you can use appendFile, which creates a new file handle each time it's called:
Asynchronously:
const fs = require('fs');
fs.appendFile('message.txt', 'data to append', function (err) {
if (err) throw err;
console.log('Saved!');
});
Synchronously:
const fs...
How do I remove version tracking from a project cloned from git?
... tracked git folder into a child folder of another tracked git folder. The new parent wouldn't recognize the new child until I removed the cache of the child folder.
– Ryan Huebert
Sep 30 '19 at 3:29
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Grouped LIMIT in PostgreSQL: show the first N rows for each group?
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New solution (PostgreSQL 8.4)
SELECT
*
FROM (
SELECT
ROW_NUMBER() OVER (PARTITION BY section_id ORDER BY name) AS r,
t.*
FROM
xxx t) x
WHERE
x.r <= 2;
...
How to develop and test an app that sends emails (without filling someone's mailbox with test data)?
...
Patrick McElhaney
51.1k3737 gold badges120120 silver badges155155 bronze badges
answered Jun 18 '09 at 6:58
rnwoodrnwoo...
How can I convert my device token (NSData) into an NSString?
... kulsskulss
2,02311 gold badge1313 silver badges1515 bronze badges
137
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