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How to place multiple evenly-spaced arrowheads along an SVG line?

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Based on a clarification of the question, here’s an implementation of creating intermediary points along a <polyline> element such that the marker-mid=”url(#arrowhead)” attribute will work. See below that for an introduction to markers and arrowheads. Demo: http://jsfiddle.net/Zv57N/ midMarkers(document.querySelector(‘polyline’),6); // Given a polygon/polyline, create intermediary points along the // “straightaways” spaced no closer than `spacing` distance … Read more

Matplotlib: Plotting numerous disconnected line segments with different colors

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use LineCollection: import numpy as np import pylab as pl from matplotlib import collections as mc lines = [[(0, 1), (1, 1)], [(2, 3), (3, 3)], [(1, 2), (1, 3)]] c = np.array([(1, 0, 0, 1), (0, 1, 0, 1), (0, 0, 1, 1)]) lc = mc.LineCollection(lines, colors=c, linewidths=2) fig, ax = pl.subplots() ax.add_collection(lc) ax.autoscale() … Read more

Line Break in XML formatting?

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Use \n for a line break and \t if you want to insert a tab. You can also use some XML tags for basic formatting: <b> for bold text, <i> for italics, and <u> for underlined text. Other formatting options are shown in this article on the Android Developers’ site: https://developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling

How do I compute the intersection point of two lines?

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Unlike other suggestions, this is short and doesn’t use external libraries like numpy. (Not that using other libraries is bad…it’s nice not need to, especially for such a simple problem.) def line_intersection(line1, line2): xdiff = (line1[0][0] – line1[1][0], line2[0][0] – line2[1][0]) ydiff = (line1[0][1] – line1[1][1], line2[0][1] – line2[1][1]) def det(a, b): return a[0] * … Read more

Line history viewer – Git

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Maybe annotations in IntelliJ IDEA is that you are looking for: Showing and hiding annotations Open the desired file in the editor. To show annotations, right-click the left gutter, and select Annotate: To hide annotations, right-click the annotations gutter, and choose Close Annotations.

Vim Macro on Every Line of Visual Selection

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Suppose you had a macro q that ran (and remained) on a single line. Then you could run it on every line in your selection with: :'<,’>normal @q (if you already have a group of lines selected, hitting : produces :'<,’> on the command line) For example, the following macro capitalizes every word but the … Read more