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MySQL WHERE: how to write “!=” or “not equals”?
...he standard <> operator.
Perhaps your fields are not actually empty strings, but instead NULL?
To compare to NULL you can use IS NULL or IS NOT NULL or the null safe equals operator <=>.
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Update all values of a column to lowercase
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See http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_lower
UPDATE table_name SET tag = LOWER(tag)
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Mongoose subdocuments vs nested schema
... name: [nestedDov]
Simple Version:
var nestedDoc = new Schema({
name: String
});
var mainDoc = new Schema({
names: [nestedDoc]
});
JSON Example
{
"_id" : ObjectId("57c88bf5818e70007dc72e85"),
"name" : "Corinthia Hotel Budapest",
"stars" : 5,
"description" : "The 5-star Cor...
Open file dialog and select a file using WPF controls and C#
...a TextBox
if (result == true)
{
// Open document
string filename = dlg.FileName;
textBox1.Text = filename;
}
}
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Can I recover a branch after its deletion in Git?
... but the time worth it. If there is a way to also search on commit message string, would be much better.
– Monir Khan
Feb 28 at 14:53
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Facebook Android Generate Key Hash
...signature.toByteArray());
Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
}
...other operations
}//end of onCreate
Replace com.face...
How to use executables from a package installed locally in node_modules?
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If "Path must be a string. Received undefined" message appears, here is a fix: github.com/zkat/npx/issues/144#issuecomment-391031816
– Valeriy Katkov
Aug 2 '18 at 15:56
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What are advantages of Artificial Neural Networks over Support Vector Machines? [closed]
...pplied directly to non-metric spaces, such as the set of labeled graphs or strings. In fact, the internal kernel function can be generalized properly to virtually any kind of input, provided that the positive definiteness requirement of the kernel is satisfied. On the other hand, to be able to use a...
Rails - Nested includes on Active Records?
... I think you mean as_json -- otherwise this renders the JSON string.
– Meekohi
Apr 5 '17 at 15:48
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Assign same value to multiple variables at once?
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actually means $a = ( $b = ( $c = $d ) )
PHP passes primitive types int, string, etc. by value and objects by reference by default.
That means
$c = 1234;
$a = $b = $c;
$c = 5678;
//$a and $b = 1234; $c = 5678;
$c = new Object();
$c->property = 1234;
$a = $b = $c;
$c->property = 5678;
// $...