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问题 I am using ImageMagick on Mac OS X (10.7). I installed it with the help of MacPorts . When I now enter the Terminal and write: identify image.jpg it is working perfectly fine. But now while executing it from within Java, the following exception gets thrown: org.im4java.core.CommandException: java.io.FileNotFoundException: identify I can see it's on the PATH by running: which identify with the response: /opt/local/bin/identify Now while running: echo $PATH I get the response: /opt/local/bin:

问题 I'm trying to get ipython working in Mac OS 10.10. problem: $ ipython returns -bash: ipython: command not found context: I'm running python2.7 on MacOS 10.10. I installed python via brew. Some info: which python = /usr/local/bin/python brew info python = python: stable 2.7.10 (bottled), HEAD Interpreted, interactive, object-oriented programming language https://www.python.org /usr/local/Cellar/python/2.7.10_2 (4977 files, 77M) * To install ipython I ran pip install ipython[all] so... pip show

问题 Will Path.GetRandomFileName generate a unique filename every single time? Also, what about Path.GetTempFileName - will that generate a unique name? 回答1: The short answer is yes in both cases. In reality get it will generate 11 random chars that means there are (26 +10)^11 possible names (1.316217e+17) so chances of creating the same name twice are none existand for all practical purposes. For more information I suggest you read this and the relevant MSDN pages 回答2: On my system Path

问题 I am programming through java 1.6 u_17, but i have JRE version 6 and JRE version 7 installed, so how to run my compiled program from JDK 1.6 to run through the JRE 6 only? By Default, it runs my class files through JRE 7, how to change this behavior? Any idea of setting Class path in windows 7, as we does it for JDK. The following is shown in my command prompt E:\JAVA>javac -version javac 1.6.0_17 E:\JAVA>java -version java version "1.7.0_09" Java(TM) SE Runtime Environment (build 1.7.0_09

问题 I'm trying to get the thumnail paths , not the bitmaps objects. When I query for these, some of the thumbnail paths are null for some reason. (I have 1028 thumbnail images in my device, the cursor length is indeed 1028, but still returning nulls) I know there are 1028 thumbnail images because I checked. Here's my code: String[] projection = {MediaStore.Images.Thumbnails._ID}; // Create the cursor pointing to the SDCard cursor = this.getContentResolver().query( MediaStore.Images.Thumbnails

问题 Say I have a path with 150 nodes / verticies. How could I simplify if so that for example a straight line with 3 verticies, would remove the middle one since it does nothing to add to the path. Also how could I avoid destroying sharp corners? And how could I remove tiny variations and have smooth curves remaining. Thanks 回答1: The simpler approach. Take 3 vertecies a, b and c and calcule: The angle/inclination of between vertecies. std::vector<VERTEX> path; //fill path std::vector<int>

问题 Say I have a path with 150 nodes / verticies. How could I simplify if so that for example a straight line with 3 verticies, would remove the middle one since it does nothing to add to the path. Also how could I avoid destroying sharp corners? And how could I remove tiny variations and have smooth curves remaining. Thanks 回答1: The simpler approach. Take 3 vertecies a, b and c and calcule: The angle/inclination of between vertecies. std::vector<VERTEX> path; //fill path std::vector<int>

问题 I was reading here on Stack Overflow about when you meet ** in a path, like: src/js/**/*.js I just would like to ask, in a single word "recursive" is suitable for this, so to ready this finally "everydir recursive" for "* *" and to feel I finally understood that, please?! 回答1: The double star in this case means all folders within the current folder , with the current folder being src/js So in full, find all files with a .js extension, in all subfolders of src/js 来源： https://stackoverflow.com

问题 I don't know what I'm doing wrong... First I've downloaded, and unzipped the folder in C:\ : Then, set it as a user variable : And added it to my PATH : And even after restarting cmd, when I check grails -version I get this : grails is not recognized as an internal or external command, operable program or batch file. What is wrong? Thanks for your help. 回答1: First try this one on CMD commandline type echo %GRAILS_HOME% Then type path and see if the grails paths is something like : C:\Windows

问题 Well in my project I create river lines from pathes . And due to my kind of big stroke-width it is very ragged : I already searched around. But the only thing I found was stroke-linejoin: round; . As you can see here: it is way better but I'm still not satisfied. Is there any way to get a really smooth line. Or let's say too have a even "rounder" linejoin ? 回答1: An interesting direction is to leverage d3.svg.line to generate paths from the coordinates of your geoJSON feature, at which point