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How do I perform the SQL Join equivalent in MongoDB?
...rect. The new $lookup operator added to the aggregation pipeline is essentially identical to a left outer join:
https://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup
From the docs:
{
$lookup:
{
from: <collection to join>,
localField: <...
Android Fragment onClick button Method
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I do this all the time, but still think it's ugly
– Alexander Farber
Jun 30 '15 at 15:25
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git clone from another directory
.../repo.git/
file:///path/to/repo.git/
These two syntaxes are mostly equivalent, except the former implies --local option.
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How to “comment-out” (add comment) in a batch/cmd?
...orrect answer. When using syntax highlighting the REM command does not actually highlight the text as "commented out".
– Automatico
May 29 '14 at 8:42
17
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How do I use prepared statements in SQlite in Android?
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I use prepared statements in Android all the time, it's quite simple :
SQLiteDatabase db = dbHelper.getWritableDatabase();
SQLiteStatement stmt = db.compileStatement("INSERT INTO Country (code) VALUES (?)");
stmt.bindString(1, "US");
stmt.executeInsert();
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submitting a GET form with query string params and hidden params disappear
...the question mark and the parameters, and then cross one's fingers to hope all browsers would leave that URL as it (and validate that the server understands it too). But I'd never rely on that.
By the way: it's not different for non-hidden form fields. For POST the action URL could hold a query stri...
Find out which remote branch a local branch is tracking
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Here is a command that gives you all tracking branches (configured for 'pull'), see:
$ git branch -vv
main aaf02f0 [main/master: ahead 25] Some other commit
* master add0a03 [jdsumsion/master] Some commit
You have to wade through the SHA and any long-...
How do I rename an open file in Emacs?
...-buffer-modified-p nil))))))
Take a look at that page, there's another really useful related function there, called "move-buffer-file".
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Programmatically change UITextField Keyboard type
... This is useful information to know- I would suggest doing a Q&A-style self-answered question just to extract the information about the currently-focused field input change (that's what I was looking for when I found this answer)
– Stonz2
Aug ...
Remove specific characters from a string in Python
...the answers, and it's noted in the documentation for str.translate.
When calling the translate method of a Unicode string, you cannot pass the second parameter that we used above. You also can't pass None as the first parameter. Instead, you pass a translation table (usually a dictionary) as the on...