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Override ActiveRecord attribute methods
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This is no longer true. Either super or this works now. I've not tested the hash notation, however.
– heartpunk
Apr 21 '11 at 17:32
2
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Select multiple records based on list of Id's with linq
...Profile.Join(idList, up => up.ID, id => id, (up, id) => up);
And now result of my measurement. I generated 100 000 UserProfiles and 100 000 ids. Join took 32ms and .Where with .Contains took 2 minutes and 19 seconds! I used pure IEnumerable for this testing to prove my statement. If you us...
Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
...ture that (among other things) forces the renewal of its threads.
This is now fixed from versions 7.0.54 and 8.0.6 of tomcat :
https://issues.apache.org/bugzilla/show_bug.cgi?id=56492
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impro...
Rename specific column(s) in pandas
...x
1 x x x
2 x x x
3 x x x
4 x x x
With 0.21+, you can now specify an axis parameter with rename:
df.rename({'gdp':'log(gdp)'}, axis=1)
# df.rename({'gdp':'log(gdp)'}, axis='columns')
y log(gdp) cap
0 x x x
1 x x x
2 x x x
3 x x x
4...
LINQ to read XML
...it with what I meant to post (ran a test against it, so I am sure it works now :))
– eglasius
Mar 22 '09 at 7:12
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What is tail call optimization?
...tyle. Many languages (Java, Python) doesn't provide TCO, then you have to know that a functional call costs memory... and the imperative style is prefered.
– mcoolive
Nov 7 '16 at 12:41
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How can I make a ComboBox non-editable in .NET?
...itable, set the DropDownStyle property to "DropDownList". The ComboBox is now essentially select-only for the user. You can do this in the Visual Studio designer, or in C# like this:
stateComboBox.DropDownStyle = ComboBoxStyle.DropDownList;
Link to the documentation for the ComboBox DropDownStyl...
What's the difference between lapply and do.call?
...he above means something like below.
list( sum( L[[1]]) , sum( L[[2]]))
Now let us do the same thing for do.call
do.call(sum, L)
It means
sum( L[[1]], L[[2]])
In our example, it returns 21. In short, lapply always returns a list while the return type of do.call really depends on the funct...
Track a new remote branch created on GitHub
...local master branch tracking the remote master branch of a github project. Now, a collaborator of mine has created a new branch in the same project, and I want to do the following accordingly:
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Problems with Android Fragment back stack
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If we keep in mind that .replace() is equal with .remove().add() that we know by the documentation:
Replace an existing fragment that was added to a container. This is essentially the same as calling remove(Fragment) for all currently added fragments that were added with the same containerViewI...