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Rails migrations: self.up and self.down versus change
Looks like the new rails version has "change" versus self.up and self.down methods.
3 Answers
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How do I pass a string into subprocess.Popen (using the stdin argument)?
...hing
other than None in the result tuple,
you need to give stdout=PIPE and/or
stderr=PIPE too.
Replacing os.popen*
pipe = os.popen(cmd, 'w', bufsize)
# ==>
pipe = Popen(cmd, shell=True, bufsize=bufsize, stdin=PIPE).stdin
Warning Use communicate() rather than
stdin....
[ :Unexpected operator in shell programming [duplicate]
...et of sh syntax - the /bin/sh executable on your system may provide only standard sh functionality, in which []-style tests are not included.
– Tim
Aug 5 '10 at 1:17
13
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How to access a dictionary element in a Django template?
...objects.filter(choice=self).count()
votes = property(calculateVotes)
And then in your template, you can do:
{% for choice in choices %}
{{choice.choice}} - {{choice.votes}} <br />
{% endfor %}
The template tag, is IMHO a bit overkill for this solution, but it's not a terrible soluti...
Consequences of using graft in Mercurial
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When you update to D and graft F::J, Mercurial runs a number of merges. It will start with this merge:
M = three_way_merge(local=D, other=F, base=E)
If we write +d for the delta between the states C and D, then we start with:
+d +...
How does lock work exactly?
...// body
}
finally
{
Monitor.Exit(temp);
}
In C# 4.0 this has changed and it is now generated as follows:
bool lockWasTaken = false;
var temp = obj;
try
{
Monitor.Enter(temp, ref lockWasTaken);
// body
}
finally
{
if (lockWasTaken)
{
Monitor.Exit(temp);
}
}
You c...
How do you test a public/private DSA keypair?
... that a given private key matches a given public key? I have a few *.pub and a few *.key files, and I need to check which go with which.
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Select all contents of textbox when it receives focus (Vanilla JS or jQuery)
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This doesn't seem to work for me on Chrome and the jQuery website says it is browser dependent. Can anyone else verify?
– Kenny Wyland
Sep 13 '12 at 20:21
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Linux vi arrow keys broken in insert mode
...s don't work in vi in insert mode at home, they just each insert a newline and a capital letter, like 'A'. Is there a way to fix that?
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Date only from TextBoxFor()
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Yes, as now there is the EditorFor helper and MVC2 is finalized, your solution is the way to go
– Kronos
Nov 8 '10 at 15:03
67
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