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You can't specify target table for update in FROM clause
...e started, or the inner query might use data that has already been updated by the query as it's in progress. Neither of these side-effects is necessarily desirable, so the safest bet is to force you to specify what will happen using an extra table.
– siride
Mar...
How can I replace a newline (\n) using sed?
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You can run this cross-platform (i.e. on Mac OS X) by separately executing the commands rather than separating with semi-colons: sed -e ':a' -e 'N' -e '$!ba' -e 's/\n/ /g'
– Benjie
Sep 27 '11 at 11:16
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Is an index needed for a primary key in SQLite?
...Y columns aside, both UNIQUE and PRIMARY KEY
constraints are implemented by creating an index in the database (in
the same way as a "CREATE UNIQUE INDEX" statement would). Such an
index is used like any other index in the database to optimize
queries. As a result, there often no advantage (b...
How to get the unique ID of an object which overrides hashCode()?
... So if an object is created at memory address 0x2000, then is moved by the VM, then an other object is created at 0x2000, will they have the same System.identityHashCode()?
– Limited Atonement
Jun 7 '13 at 22:54
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How to create a new (and empty!) “root” branch?
I would like to define a new "root" branch in this git repository. By "root" branch I mean a branch that is entirely independent of all the other branches in the repository 1 .
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How to make CSS width to fill parent?
...ar it will expand to its needed width. IF i recall you can counteract this by setting display: block !important; though its been awhile since ive had to fix that. (im sure someone will correct me if im wrong).
textarea#bar i beleive is a block level element so it will follow the rules the same as t...
How to use JavaScript variables in jQuery selectors?
...put type="button" name="bx" value="1" />
<input type="text" id="by" />
<input type="button" name="by" value="2" />
String Concatenation
If you need IE/EDGE support use
$("#" + $(this).attr("name")).hide();
(function($) {
$("input[type=bu...
Keystore type: which one to use?
By looking at the file java.security of my JRE , I see that the keystore type to use by default is set to JKS . Here , there is a list of the keystore types that can be used.
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android layout: This tag and its children can be replaced by one and a compound drawable
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Merge the TextView and the ImageView into one, by using TextView's setCompoundDrawable*() methods, or using android:drawableLeft.
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Referencing another schema in Mongoose
...ur post schema:
var postSchema = new Schema({
name: String,
postedBy: {type: mongoose.Schema.Types.ObjectId, ref: 'User'},
dateCreated: Date,
comments: [{body:"string", by: mongoose.Schema.Types.ObjectId}],
});
Then make your model:
var Post = mongoose.model('Post', postSchema);
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