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Identifying the dependency relationship for python packages installed with pip
...ask [installed: 0.10.1]
- Werkzeug [required: >=0.7, installed: 0.9.4]
- Jinja2 [required: >=2.4, installed: 2.7.2]
- MarkupSafe [installed: 0.18]
- itsdangerous [required: >=0.21, installed: 0.23]
alembic==0.6.2
- SQLAlchemy [required: >=0.7.3, installed: 0.9.1]
- ...
How do I log errors and warnings into a file?
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Dave Jarvis
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answered Aug 20 '10 at 14:32
AmanAman
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Using CSS in Laravel views?
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Fernando MontoyaFernando Montoya
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How does this checkbox recaptcha work and how can I use it?
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edited Nov 11 '14 at 19:16
answered Sep 9 '14 at 12:24
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What is the optimal length for user password salt? [closed]
...ly need to be long enough so that each user's salt will be unique. Random 64-bit salts are very unlikely to ever repeat even with a billion registered users, so this should be fine. A singly repeated salt is a relatively minor security concern, it allows an attacker to search two accounts at once bu...
How to get ID of the last updated row in MySQL?
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240
I've found an answer to this problem :)
SET @update_id := 0;
UPDATE some_table SET column_name...
How can I scan barcodes on iOS?
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84
We produced the 'Barcodes' application for the iPhone. It can decode QR Codes. The source code i...
Tricks to manage the available memory in an R session
... [based on postings by Petr Pikal and David Hinds to the r-help list in 2004] to list (and/or sort) the largest objects and to occassionally rm() some of them. But by far the most effective solution was ... to run under 64-bit Linux with ample memory.
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Export CSS changes from inspector (webkit, firebug, etc)
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Update MongoDB field using value of another field
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The best way to do this is in version 4.2+ which allows using of aggregation pipeline in the update document and the updateOne, updateMany or update collection method. Note that the latter has been deprecated in most if not all languages drivers.
MongoDB 4.2+
V...