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Find svg viewbox that trim whitespace around

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问题 Assuming I have an svg that draws some paths, what tools should I use to find a viewbox that perfectly fits those paths so that all redundant space around is trimmed? 回答1: You can simply set your svg's viewBox to its Bounding Box. function setViewbox(svg) { var bB = svg.getBBox(); svg.setAttribute('viewBox', bB.x + ',' + bB.y + ',' + bB.width + ',' + bB.height); } document.querySelector('button').addEventListener('click', function() { setViewbox(document.querySelector('svg')); }); svg {

Remove unwanted White Space in WebView Android

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问题 I have started developing an App using WebView. Actually I am loading an Image with Webview (I like to use the built-in zoom controls of the class). I can successfully load the Image but I can see some irritating white spaces. I can't find the way to remove it. My Images are 750 * 1000 in size. I have attached my code below. webview.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android

How to check if text is “empty” (spaces, tabs, newlines) in Python?

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How can I test if the string is empty in Python? For example, "<space><space><space>" is empty, so is "<space><tab><space><newline><space>" , so is "<newline><newline><newline><tab><newline>" , etc. Vladislav yourString.isspace() "Return true if there are only whitespace characters in the string and there is at least one character, false otherwise." Combine that with a special case for handling the empty string. Alternatively, you could use strippedString = yourString.strip() And then check if strippedString is empty. >>> tests = ['foo', ' ', '\r\n\t', '', None] >>> [bool(not s or s.isspace())

How can I find whitespace in a String?

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问题 How can I check to see if a String contains a whitespace character, an empty space or " ". If possible, please provide a Java example. For example: String = "test word"; 回答1: For checking if a string contains whitespace use a Matcher and call it's find method. Pattern pattern = Pattern.compile("\\s"); Matcher matcher = pattern.matcher(s); boolean found = matcher.find(); If you want to check if it only consists of whitespace then you can use String.matches: boolean isWhitespace = s.matches("^\

Regular expression to allow spaces between words

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I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words. ^[a-zA-Z0-9_]*$ For example, when using this regular expression "HelloWorld" is fine, but "Hello World" does not match. How can I tweak it to allow spaces? tl;dr Just add a space in your character class . ^[a-zA-Z0-9_ ]*$ Now, if you want to be strict... The above isn't exactly correct. Due to the fact that * means zero or more , it would match all of the following cases that one would not usually mean to match: An empty string, "".

How to insert spaces/tabs in text using HTML/CSS

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问题 Possible ways: <pre> ... </pre> or style=\"white-space:pre\" Anything else? 回答1: To insert tab space between two words/sentences I usually use and 回答2: In cases wherein the width/height of the space is beyond I usually use: For horizontal spacer: <span style="display:inline-block; width: YOURWIDTH;"></span> For vertical spacer: <span style="display:block; height: YOURHEIGHT;"></span> 回答3: You can use for spaces, < for < (less than, entity number < ) and > for > (greater than, entity

Removing body margin in CSS

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问题 I\'m new to web development, and met a problem when removing margin of body. There\'s space between the very top of the browser and \"logo\" text. And my code is here on jsbin. Is body { margin: 0;} wrong if I\'d like to remove the space? 回答1: I would say that using: * { margin: 0; padding: 0; } is a bad way of solving this. The reason for the h1 margin popping out of the parent is that the parent does not have a padding. If you add a padding to the parent element of the h1, the margin will

In bash, how do I expand a wildcard while it's inside double quotes?

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问题 I would like to write the following function in bash: go() { cd \"~/project/entry ${1}*\" } What this would do is to cd into a project subdirectory with prefix entry (note space) and possibly a long suffix. I would only need to give it a partial name and it will complete the suffix of the directory name. So, if for example, I have the following folders: ~/project/entry alpha some longer folder name ~/project/entry beta another folder name ~/project/entry gamma I can run go b and it will put

std::cin input with spaces?

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问题 #include <string> std::string input; std::cin >> input; The user wants to enter \"Hello World\". But cin fails at the space between the two words. How can I make cin take in the whole of Hello World ? I\'m actually doing this with structs and cin.getline doesn\'t seem to work. Here\'s my code: struct cd { std::string CDTitle[50]; std::string Artist[50]; int number_of_songs[50]; }; std::cin.getline(library.number_of_songs[libNumber], 250); This yields an error. Any ideas? 回答1: You have to use