pack

auto-repeat flag in a pack format string

由 旧时模样 提交于 2019-11-28 09:23:33
问题 In php, unpack() has the "*" flag which means "repeat this format until the end of input". For example, this prints 97, 98, 99 $str = "abc"; $b = unpack("c*", $str); print_r($b); Is there something like this in python? Of course, I can do str = "abc" print struct.unpack("b" * len(str), str) but I'm wondering if there is a better way. 回答1: There is no such facility built into struct.unpack , but it is possible to define such a function: import struct def unpack(fmt, astr): """ Return struct

pack / unpack functions for node.js [closed]

由 泪湿孤枕 提交于 2019-11-27 07:36:47
Are there any modules that provide pack / unpack functionality for nodejs similar to python's struct module? I haven't found any specifically for node, and I'd assume that javascript implementations would be significantly slower. Thanks. https://github.com/pgriess/node-jspack appears to be a straight-up port of Python's struct API for packing binary data, but it's implemented in JS. It doesn't appear to be packaged for npm yet. https://github.com/substack/node-binary provides unpacking, also implemented in JS, and you can install it with npm install binary if you have npm installed. https:/

struct pack return is too long

由 六月ゝ 毕业季﹏ 提交于 2019-11-27 06:14:22
问题 I'm trying to use the struct.pack function import struct values = (0, 44) s = struct.Struct('HI') b = s.pack(*values) print(b) print(str(len(b))) and it gives me this output: b'\x00\x00\x00\x00,\x00\x00\x00' 8 while the python docs say: Format - C Type - Python type - Standard size - Notes H - unsigned short - integer - 2 - (3) I - unsigned int - integer - 4 - (3) so len() should be 2 + 4 = 6, and I need bytes with size = 6 Any ideas? I'm using Python 3.6 on Windows 10 回答1: pack will add pad

Java equivalent of Python's struct.pack?

由 自作多情 提交于 2019-11-27 03:51:01
问题 Is there any function equivalent to Python's struct.pack in Java that allows me to pack and unpack values like this? pump_on = struct.pack("IIHHI", 0, 0, 21, 96, 512) 回答1: I think what you may be after is a ByteBuffer: ByteBuffer pump_on_buf = ... pump_on_buf.putInt(0); pump_on_buf.putInt(0); pump_on_buf.putShort(21); pump_on_buf.putShort(96); pump_on_buf.putInt(512); byte[] pump_on = pump_on_buf.array(); 回答2: Something like this: final ByteArrayOutputStream data = new ByteArrayOutputStream()

jQuery Linking vs. Download?

由 ℡╲_俬逩灬. 提交于 2019-11-27 02:21:42
问题 Which way is better? To link to the jQuery Pack at http://ajax.googleapis.com. Or to download the appropriate file and link locally? Does it matter? Is there a chance the link may disappear? Or is there a chance the file online will be updated, and it's better to link to it? Curious. Thanks, Tracy 回答1: From the Google Code site: Google works directly with the key stake holders for each library effort and accepts the latest stable versions as they are released. Once we host a release of a

Remove large .pack file created by git

由 家住魔仙堡 提交于 2019-11-26 21:24:47
I checked a load of files in to a branch and merged and then had to remove them and now I'm left with a large .pack file that I don't know how to get rid of. I deleted all the files using git rm -rf xxxxxx and I also ran the --cached option as well. Can someone tell me how I can remove a large .pack file that is currently in the following directory: .git/objects/pack/pack-xxxxxxxxxxxxxxxxx.pack Do I just need to remove the branch that I still have but am no longer using? Or is there something else I need to run? I'm not sure how much difference it makes but it shows a padlock against the file.

python pack() and grid() methods together

由 情到浓时终转凉″ 提交于 2019-11-26 19:10:34
Im new to python so please forgive my Noob-ness. Im trying to create a status bar at the bottom of my app window, but it seems every time I use the pack() and grid() methods together in the same file, the main app window doesn't open. When I comment out the line that says statusbar.pack(side = BOTTOM, fill = X) my app window opens up fine but if I leave it in it doesn't, and also if I comment out any lines that use the grid method the window opens with the status bar. It seems like I can only use either pack() or grid() but not both. I know I should be able to use both methods. Any suggestions

pack / unpack functions for node.js [closed]

由 假如想象 提交于 2019-11-26 17:41:42
问题 Are there any modules that provide pack / unpack functionality for nodejs similar to python's struct module? I haven't found any specifically for node, and I'd assume that javascript implementations would be significantly slower. Thanks. 回答1: https://github.com/pgriess/node-jspack appears to be a straight-up port of Python's struct API for packing binary data, but it's implemented in JS. It doesn't appear to be packaged for npm yet. https://github.com/substack/node-binary provides unpacking,

exception in initializer error

由 独自空忆成欢 提交于 2019-11-26 16:13:20
I am using Netbeans. I did some things with bindings and now whenever I start my program, before it even intializes the form, it gives me an error The exception in thread main is ocuring before the form is even an intialized object yet. The form is not even an object yet. Every line in my main() causes an exception. Random stuff. I don't understand it at all. Here is the error. Exception in thread "main" java.lang.ExceptionInInitializerError at obd2ner.main(obd2ner.java:26) Caused by: java.lang.ClassCastException at java.lang.Class.cast(Class.java:2990) at org.jdesktop.beansbinding.Binding

Remove large .pack file created by git

由 試著忘記壹切 提交于 2019-11-26 07:55:02
问题 I checked a load of files in to a branch and merged and then had to remove them and now I\'m left with a large .pack file that I don\'t know how to get rid of. I deleted all the files using git rm -rf xxxxxx and I also ran the --cached option as well. Can someone tell me how I can remove a large .pack file that is currently in the following directory: .git/objects/pack/pack-xxxxxxxxxxxxxxxxx.pack Do I just need to remove the branch that I still have but am no longer using? Or is there
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