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问题 I've produced the following image: where there is this little blank space between the pm3d map and the two side profiles and it's kinda annoying. I suspect it may be due to the profiles (the gaussians) being slighly large, but, isn't that controlled by the margins definements? The gnuplot code is: set encoding utf8 set term x11 set terminal pngcairo dashed nocrop size 640,560 enhanced solid color font 'Helvetica,12' butt dashed set output "E_vs_eta_big_N4.png" set multiplot set lmargin screen

问题 I am using both Cplex and Gurobi for an LP program whose inequality constraint matrix A can become truly large -- around 5 to 10GB. When I want to use one of those solvers, I have to create a separate struct with all the problem constraints. This means that I have the matrix A in my workspace, and the matrix A in my solver struct at the same time. Even if I clear it in my Workspace as fast as possible, there is still a time when both exist and my RAM is overloaded. I am asking if there is

问题 I am using JAXB to unmarshall an XML message. It seems to replace multiple consecutive spaces by a single space. <testfield>this is a test<\testfield> (several spaces between a and test) upon unmarshalling, the above becomes: this is test How do I keep consecutive spaces as they are in source XML? 回答1: From the msdn page: Document authors can use the xml:space attribute to identify portions of documents where white space is considered important. Style sheets can also use the xml:space

问题 I have just started with CSS and have created a dropdown menu. Everything looks good in Chrome and IE, but with Firefox I run into two problems: 1) The gradient is not the light green as in Chrome or IE, but a heavier/darker grey. 2) The menu is displayed with an extra 7px on the right side. These 7px are not just empty space, as it has the background of my nav ul element, but it is not part of (though maybe caused by) any li elements. Regarding the second issue, I have found that Firefox

问题 So I have Apache Web Hosting from some provider. how to determin how much freespace (mb's) for hosting files I have using php function? 回答1: disk_free_space 来源： https://stackoverflow.com/questions/2806866/how-to-determin-how-much-space-is-freeon-your-server-php

问题 I've been looking at the code and I still can't figure out how they achieved the 2px margin between the th elements: This is the site: http://ecigarettereviewed.com/ Any ideas? 回答1: Here's the relevant CSS: table { border-collapse: separate; border-spacing: 2px; } This is actually a browser default style: 回答2: I believe this is the CSS that causes those borders: table { border-collapse: separate; border-spacing: 2px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px

问题 I am creating a music player which uses the spacebar to pause and play audio, now is it possible to know if someone is currently typing in a textfield, because right now, if this user types in a textfield and audio is playing, when the user presses space the audio pauses, I would like basically that when the user is not in a textfield that a user can just play and pause audio, but when the user is typing that this function is disabled so the audio keeps playing. The code below, is the code I

问题 Given a 2D space limited by a (white) rectangle and a set of (black) rectangles occupying that space I am looking for a way to somehow index the empty (white) space. For that purpose I would like to create a set of (white) rectangles such that for any given point in the space (point not belonging to any "black" rectangle) maximal empty rectangle exists in that resulting set of white rectangles. Thanks 回答1: Are you in a grid (i.e. an image) or in a continuous 2D space ? My answer is for the

问题 When using PHP how can I validate a simple text input to check if the field only contains space character, I want to prevent it from being possible to sign up to my website with a blank name consisting of just spaces and the same goes for other inputs such as comments? If I check if it is empty it just returns it as not empty as it considers a space as a character regardless. For future reference the answer was to first trim my post data: $variable = mysql_real_escape_string(stripslashes(trim

问题 I am having some trouble with a command. I have a file of the type csv which looks like this: Merkmals-Nr.;Interne Teile-Nr.;Bereich;Fertigungsschritt;... After reading the File in is want to read one Line and then split the line after ";" by using this codeline. List<String> datenListe = Arrays.asList(data.split(";")); Then I do a system.println How the print should look: Merkmals-Nr. Interne Teile-Nr. Bereich Fertigungsschritt ... How the print actually looks: Merkmals-Nr. Interne Exception