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Method to Add new or update existing item in Dictionary
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The only problem could be if one day
map[key] = value
will transform to -
map[key]++;
and that will cause a KeyNotFoundException.
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What is the difference between D3 and jQuery?
... visualization, it does this by filtering through DOM objects and applying transformations.
jQuery is made for DOM manipulation and making life easier for many basic JS tasks.
If you're looking to turn data into pretty, interactive pictures, D3 is awesome.
If you're looking to move, manipulate...
Regex to remove all (non numeric OR period)
...d!
Removing non-digits or periods, the string joe.smith ($3,004.50) would transform into the unparseable .3004.50.
Imho, it is better to match a specific pattern, and extract it using a group. Something simple would be to find all contiguous commas, digits, and periods with regexp:
[\d,\.]+
Sam...
How can I rename a database column in a Ruby on Rails migration?
...//api.rubyonrails.org/classes/ActiveRecord/Migration.html
Under Available Transformations
rename_column(table_name, column_name, new_column_name):
Renames a column but keeps the type and content.
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指定组件的大小 · App Inventor 2 中文网
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指定组件的大小
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指定组件的大小
When you create a visible component in the designer, you are typically given the opportunity to specify its height and width. There a...
How does lombok work?
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Project Lombok: Creating Custom Transformations is some helpful.
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What is the “right” way to iterate through an array in Ruby?
... to "length.times".
map is another way to iterate, useful when you want to transform one array into another.
select is the iterator to use when you want to choose a subset.
inject is useful for generating sums or products, or collecting a single result.
It may seem like a lot to remember, but don...
Inline elements shifting when made bold on hover
...ine-block;
text-align:center;
font: normal 16px Arial;
text-transform: uppercase;
}
a:hover {
font-weight:bold;
}
a::before {
display: block;
content: attr(title);
font-weight: bold;
height: 0;
overflow: hidden;
visibility: hidden;
}
<ul>...
Removing fields from struct or hiding them in JSON Response
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I just published sheriff, which transforms structs to a map based on tags annotated on the struct fields. You can then marshal (JSON or others) the generated map. It probably doesn't allow you to only serialize the set of fields the caller requested, but I ...
Intelligent point label placement in R
...phisticated algorithms that have been presented is to make in-place simple transformations to the dataframe.
I illustrate this with ggplot2 because I'm more familiar with that syntax than base R plots.
df <- data.frame(x = x, y = y, z = ShortSci)
library("ggplot2")
ggplot(data = df, aes(x = x, ...