大约有 9,000 项符合查询结果（耗时：0.0227秒） [XML]
What does the “map” method do in Ruby?
...vid", "thomas"].map(&:upcase)
#=> ["VANESSA", "DAVID", "THOMAS"]
Transforming data in Ruby often involves a cascade of map operations. Study map & select, they are some of the most useful Ruby methods in the primary library. They're just as important as each.
(map is also an alias for...
Fixed stroke width in SVG
...pixel-aware", that is always be 1px wide regardless of the current scaling transformations applied. I am aware that this may well be impossible, since the whole point of SVG is to be pixel independent.
...
How do you easily horizontally center a using CSS? [duplicate]
... The code follows.
.centered {
position: relative;
left: 50%;
transform: translateX(-50%);
}
What this does is:
Position the div relative to its container;
Position the div's left boundary at 50% of its container width horizontally;
Translate back horizontally by 50% of the div's o...
How to convert a PIL Image into a numpy array?
...ect back and forth to a numpy array so I can do some faster pixel by pixel transformations than PIL's PixelAccess object would allow. I've figured out how to place the pixel information in a useful 3D numpy array by way of:
...
How to put the legend out of the plot
... plt.legend(bbox_to_anchor=(1,0), loc="lower right",
bbox_transform=fig.transFigure, ncol=3)
l6 = plt.legend(bbox_to_anchor=(0.4,0.8), loc="upper right")
Details about how to interpret the 4-tuple argument to bbox_to_anchor, as in l4, can be found in this question. The mode="expand...
Looking for a clear definition of what a “tokenizer”, “parser” and...
...whitespace makes sense in the lexer. If you are building source-to-source transformation tools, you cannot lose comments because they must reappear in the transformed text. So ALWAYS removing comments is wrong; we can argue about how one manages to preserve whitespace. ...
– ...
What is the difference between syntax and semantics in programming languages?
... valid C statements. But what do they mean? Is it even valid to attempt to transform these statements into an executable sequence of instructions? These questions are at the heart of semantics.
Consider the ++ operator in the first statement. First of all, is it even valid to attempt this?
If x i...
pyplot axes labels for subplots
...l_prop = dict()
pylab.text(x,y,label,rotation=rotation,
transform=fig.transFigure,
ha=ha,va=va,
**label_prop)
share
|
improve this answer
|...
How can I sort arrays and data in PHP?
...erent fields that shouldn't cancel out each other's work.
The Schwartzian transform
The Schwartzian transform, also referred to as the decorate-sort-undecorate idiom, effects a stable sort with an inherently unstable sorting algorithm.
First, you decorate each array element with another array com...
How do I tar a directory of files and folders without including the directory itself?
...
Have a look at --transform/--xform, it gives you the opportunity to massage the file name as the file is added to the archive:
% mkdir my_directory
% touch my_directory/file1
% touch my_directory/file2
% touch my_directory/.hiddenfile1
% tou...