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How to efficiently build a tree from a flat structure?
... objects in a hash table mapping to the specific object. Enumerate through all the objects and find their parent if it exists and update its parent pointer accordingly.
class MyObject
{ // The actual object
public int ParentID { get; set; }
public int ID { get; set; }
}
class Node
{
pu...
What's a good IDE for Python on Mac OS X? [closed]
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If the question was "What's an IDE for python that actually works and actually has basic functionality" then PyCharm would be the ONLY answer
– samthebest
Dec 3 '13 at 14:47
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Android studio: why are minSdkVersion and targetSdkVersion specified both in AndroidManifest.xml and
...ties and generate another apk.
You can leave the manifest as it is and do all configuration in build.gradle. You can safely remove
<uses-sdk></uses-sdk>
from manifest as well as version codes.
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How to override !important?
...he !important rule.
td.a-semantic-class-name { height: 100px; }
I personally never use !important in my style sheets. Remember that the C in CSS is for cascading. Using !important will break this.
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How do I sort a dictionary by value?
...(x.items(), key=operator.itemgetter(0))
In Python3 since unpacking is not allowed [1] we can use
x = {1: 2, 3: 4, 4: 3, 2: 1, 0: 0}
sorted_x = sorted(x.items(), key=lambda kv: kv[1])
If you want the output as a dict, you can use collections.OrderedDict:
import collections
sorted_dict = collection...
How to set environment variable or system property in spring tests?
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Thanks for this. The static thing didnt work but a small method with @BeforeClass worked !
– Midhun Agnihotram
Dec 30 '16 at 4:31
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How do you specify a byte literal in Java?
...imple helper method byte b(int i) { return (byte) i; } somewhere and statically import it. Then you can write f(b(10)).
– Yona Appletree
Oct 11 '13 at 18:56
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count the frequency that a value occurs in a dataframe column
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If you want to apply to all columns you can use:
df.apply(pd.value_counts)
This will apply a column based aggregation function (in this case value_counts) to each of the columns.
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Hand Coded GUI Versus Qt Designer GUI [closed]
... compile into your application. We started using for that purpose but with all generated code, once you edit it, you can no longer go back and regenerate it without losing your edits. We ended up just taking the generated code and doing everything by hand henceforth.
Qt4
Qt4 has improved on Design...
Action Image MVC3 Razor
...butes = HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes); and finally foreach (var attr in attributes){ imgBuilder.MergeAttribute(attr.Key, attr.Value.ToString());}
– guzart
Dec 4 '11 at 5:33
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