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When would you use the Builder Pattern? [closed]
... and it might have the following methods (parameters are not shown):
BuildOrderHeaderRow()
BuildLineItemSubHeaderRow()
BuildOrderRow()
BuildLineItemSubRow()
This builder would then spit out the HTML for me. This is much easier to read than walking through a large procedural method.
Check out Bui...
Backbone View: Inherit and extend events from parent
...ted. the only context used is this versus having to call the parent class by instance name. thank you very much for this.
– jessie james jackson taylor
Oct 16 '14 at 1:42
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Find which version of package is installed with pip
..., is it possible to figure out which version of a package is currently installed?
15 Answers
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Compare two DataFrames and output their differences side-by-side
...original question
The first step is to concatenate the DataFrames horizontally with the concat function and distinguish each frame with the keys parameter:
df_all = pd.concat([df.set_index('id'), df2.set_index('id')],
axis='columns', keys=['First', 'Second'])
df_all
It's pr...
TypeScript typed array usage
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It is also the suggested method from typescript for array declaration.
By using the Array<Thing> it is making use of the generics in typescript. It is similar to asking for a List<T> in c# code.
// Declare with default value
private _possessions: Array<Thing> = new Array<T...
What are all possible pos tags of NLTK?
How do I find a list with all possible pos tags used by the Natural Language Toolkit (nltk)?
8 Answers
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Using the rJava package on Win7 64 bit with R
I'm trying to install rJava on a computer with Win 7 64 bit. When I run
12 Answers
1...
How do Trigonometric functions work?
...ey do a lousy job of distributing the function approximation's accuracy in order to be "perfect" right near the evaluation point; the error generally zooms upwards as you get away from it. And if you have a function with any noncontinuous derivative (e.g. square waves, triangle waves, and their inte...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
...n of X[Y]
le <- Y[X]
mallx <- merge(X, Y, all.x = T)
# the column order is different so change to be the same as `merge`
setcolorder(le, names(mallx))
identical(le, mallx)
# [1] TRUE
If you want a full outer join
# the unique values for the keys over both data sets
unique_keys <- uniq...
sqlalchemy unique across multiple columns
...sents locations. Locations "belong" to customers. Locations are identified by a unicode 10 character code. The "location code" should be unique among the locations for a specific customer.
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