removing-whitespace

问题 I have an input field that needs a username. The scenario is, how can i prevent user from providing whitespace or whitespaces in the that field? I already added required in the input field so i can prevent user from leaving it blank. <input type="text" name="username" required> but what if the user puts whitespace or as many whitespace as he can, is there any possible way i can detect this and throw error to the user? in my php file i already have if(empty($_POST['username'])){ echo "Username

问题 I have an input field that needs a username. The scenario is, how can i prevent user from providing whitespace or whitespaces in the that field? I already added required in the input field so i can prevent user from leaving it blank. <input type="text" name="username" required> but what if the user puts whitespace or as many whitespace as he can, is there any possible way i can detect this and throw error to the user? in my php file i already have if(empty($_POST['username'])){ echo "Username

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago . We have randomly named pdf documents being uploaded to a Google Drive folder. When uploading these documents sometimes there is a space in front of the file name, ex. " 12345.pdf" . I want to delete this whitespace in front of the file name with a batch file. 回答1: If the number of leading spaces is

问题 What is the fastest way to replace extra white spaces to one white space? e.g. from foo bar to foo bar 回答1: The fastest way? Iterate over the string and build a second copy in a StringBuilder character by character, only copying one space for each group of spaces. The easier to type Replace variants will create a bucket load of extra strings (or waste time building the regex DFA). Edit with comparison results: Using http://ideone.com/NV6EzU, with n=50 (had to reduce it on ideone because it

问题 The ultimate goal is to prevent whitespace in a pool of validated XML content by simply not allowing bad xs:token content to pass schema validation for relevant elements. Schema-invalid instances are not allowed into the pool. If I declare an element's type to be xsd:token in an XML Schema (1.1) and I try to validate an instance of this schema where the xsd:token -typed element contains more than zero of the repudiated characters (tab, LF, CR) or a double, leading or trailing space, will said

问题 The function normalize-space removes leading and trailing whitespace and replaces sequences of whitespace characters by a single space. How can I only replaces sequences of whitespace characters by a single space in XSLT 1.0? For instance "..x.y...\n\t..z." (spaces replaced by a dot for readability) should become ".x.y.z." . 回答1: Without Becker's method, you could use some discouraged character as mark: translate(normalize-space(concat('&#x7F;',.,'&#x7F;')),'&#x7F;','') Note : Three function

问题 I'm calling a REST API and am receiving an XML response back. It returns a list of a workspace names, and I'm writing a quick IsExistingWorkspace() method. Since all workspaces consist of contiguous characters with no whitespace, I'm assuming the easiest way to find out if a particular workspace is in the list is to remove all whitespace (including newlines) and doing this (XML is the string received from the web request): XML.Contains("<name>" + workspaceName + "</name>"); I know it's case

问题 I trying to create an output XML file from an input XML file. Some of the nodes need to be copied from input to output, some with be omitted, and a few of the nodes will have their text modified in some way. However in addition to this, I need to trim the whitespace from the text of every node. I assume that the best way to do this is to have two templates called on the same set of nodes using a mode or some other attribute, but I cannot figure out how to do this. There are too many nodes to

问题 How can I get rid of the space at the bottom of the page? /* Basic Style */ html, body { height: 100%; } body { background-color: #FFFFFF; font-family: 'Roboto', sans-serif; font-size: 12pt; font-weight: 100; color: #212121; text-decoration: none; line-height: 100%; height: 100%; margin: 0px 0px 0px 0px; } a:link { color: #42b4da; font-family: 'Roboto', sans-serif; text-decoration: none; } a:visited { color: #002946; text-decoration: none; } a:active, a:hover { color: #670f08; text-decoration

问题 An example of my question in the title demonstrates the problem I'm having. example sorry don't know how to use jsfiddle. And how do I fix it? 回答1: It seems your "empty file" contain an empty line, http://wx2fly.com/test/emptyFile.php , which means it's not empty ! I think you can fix your problem by making your empty (or not) file starts with <?php , and be sure the php tag is NOT closed at the end of the file. 来源： https://stackoverflow.com/questions/16139630/why-does-php-include-statement