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Dealing with multiple Python versions and PIP?
... recommendation because it works across all versions of Python, and in all forms of virtualenv. For example:
# The system default python:
$ python -m pip install fish
# A virtualenv's python:
$ .env/bin/python -m pip install fish
# A specific version of python:
$ python-3.6 -m pip install fish
...
How to change a nullable column to not nullable in a Rails migration?
...umn => Time.now}, {:date_column => nil}). The query in your original form just made all my models have nil value in the field.
– dimitarvp
Aug 1 '12 at 12:16
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What is the 'instanceof' operator used for in Java?
...not sure what they are. Let's say you've got a collection of controls on a form. You want to read the checked state of whatever checkboxes are there, but you can't ask a plain old object for its checked state. Instead, you'd see if each object is a checkbox, and if it is, cast it to a checkbox and c...
javascript: Clear all timeouts?
...h is not required by specification). Althrough the starting number differs form browser to browser. It seems that Opera, Safari, Chrome and IE > 8 starts timeout ids from 1, Gecko-based browsers from 2 and IE <= 8 from some random number that is magically saved across tab refresh. You can disc...
Make Vim show ALL white spaces as a character
...sual, to understand how listchars works, use the help. It provides great information about what chars can be displayed (like trailing space, for instance) and how to do it:
:help listchars
It might be helpful to add a toggle to it so you can see the changes mid editing easily (source: VIM :set li...
What is stdClass in PHP?
...for booleans will be extremely old, probably written before standards were formed. Let's be honest, PHP was originally written as a complete mess without any standards (see the wide range of variable/function/object naming conventions used). I've honestly never seen any PHP code where the developer ...
Is PHP compiled or interpreted?
... to produce bytecode for processing by the Zend Engine, giving improved performance over its interpreter predecessor.
– kiranvj
Jul 28 '12 at 16:17
5
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How do I check if file exists in jQuery or pure JavaScript?
...
its some more details on the non-jQuery form which can be helpful
– tim peterson
Jul 2 '13 at 14:12
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Dealing with “Xerces hell” in Java/Maven?
....0 JARs (and source JARs!) of Xerces in Maven Central since 20th February 2013! See Xerces in Maven Central. I wonder why they haven't resolved https://issues.apache.org/jira/browse/XERCESJ-1454...
I've used:
<dependency>
<groupId>xerces</groupId>
<artifactId>xerces...
How do I Search/Find and Replace in a standard string?
...if you need to. What I don't see, is how to do this without applying some form of regular expression parsing -- instead using only a direct interpretation of the from characters.
– Brent Bradburn
Jun 23 '16 at 14:36
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