hash

How to improve the usage of lock_keys in Perl?

由 白昼怎懂夜的黑 提交于 2020-01-04 03:52:36
问题 I'm using Hash::Util 's lock_keys to die whenever trying to access a non-existing key in a hash. Sometimes my hashes are deep (hash of hashes of hashes...). Is there a quick method to lock them all at once? Is it possible to control the default message upon failure (i.e. add a Dump of the hash in which the key wasn't found) 回答1: lock_hash_recurse Catch the exception, then dump as you wish and rethrow. use Try::Tiny; try { $hash{key} = 123; # illegal modification } catch { use DDS; DumpLex \

Java port of Hash by Jenkins [closed]

由 冷暖自知 提交于 2020-01-04 03:14:25
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am looking for a java port of this file, Jenkins Hash in C 回答1: This looks like one. Though, by the looks of description on the Wikipedia article you could port it yourself without too much trouble. 回答2: Hsieh's hash is even better. I don't know of a java implementation - i'm writing one right now. 回答3: At

md5/sha1 hashing large files

由 本小妞迷上赌 提交于 2020-01-04 02:42:04
问题 I have over 1/2 million files to hash over multiple folders An md5/crc hashing is taking too long some files are 1GB ~ 11Gb in size Im thinking of just hashing part of the file using head So the below works when it comes to hashing finding and hashing everything. find . -type f -exec sha1sum {} \; Im just sure how to take this a step further and just do hash for the first say 256kB of the file e.g find . -type f -exec head -c 256kB | sha1sum Not sure if head is okay to use in this instance of

Changing the Android Webview hash without reloading page

由 谁都会走 提交于 2020-01-03 22:54:09
问题 I'm got a custom webview setup which is working pretty well, but I'd like to be able to either: 1, change the url hash without the webview reloading the page (it would lose the state of my js app) 2, call some js that sits within my web page from within android. I can't change any JS within the site, unfortunately, so can't custom write any js to put on the site especially for the job, the only stuff I have control over is the Android app. Can anyone think of a way of doing either of these?

Advantage of 'one dimensional' hash over array in Perl

由 谁都会走 提交于 2020-01-03 20:05:13
问题 I was just wondering about the efficiency of using a one dimensional hash (i.e. only keys, no values - we don't care about them anyway) over a one dimensional array. The main reason I wanted to use a hash for this purpose is so I can use the exists function to see if an 'entry' already exists. Hashes are also great for not duplicating keys right? With arrays, I would need to set up my own checks involving grep which I'm led to believe would be slower. This hash/array will then be iterated

How to set dynamically value of nested key in Ruby hash

由 笑着哭i 提交于 2020-01-03 19:08:15
问题 it should be easy, but I couldn't find a proper solution. for the first level keys: resource.public_send("#{key}=", value) but for foo.bar.lolo ? I know that I can get it like the following: 'foo.bar.lolo'.split('.').inject(resource, :send) or resource.instance_eval("foo.bar.lolo") but how to set the value to the last variable assuming that I don't know the nesting level, it may be second or third. is there a general way to do that for all levels ? for my example I can do it like the

How to set dynamically value of nested key in Ruby hash

由 核能气质少年 提交于 2020-01-03 19:06:05
问题 it should be easy, but I couldn't find a proper solution. for the first level keys: resource.public_send("#{key}=", value) but for foo.bar.lolo ? I know that I can get it like the following: 'foo.bar.lolo'.split('.').inject(resource, :send) or resource.instance_eval("foo.bar.lolo") but how to set the value to the last variable assuming that I don't know the nesting level, it may be second or third. is there a general way to do that for all levels ? for my example I can do it like the

Generating (very) large non-repeating integer sequence without pre-shuffling

由 依然范特西╮ 提交于 2020-01-03 17:34:17
问题 Background I have a simple media client/server I've written, and I want to generate a non-obvious time value I send with each command from the client to the server. The timestamps will have a fair bit of data in them (nano-second resolution, even if it's not truly accurate, due to limitations of timer sampling in modern operating systems), etc. What I'm trying to do (on Linux, in C), is to generate a one-to-one sequence of n-bit values (let's assume data is store in 128bit array-of-int

数据库中间件分片算法之stringhash

由 牧云@^-^@ 提交于 2020-01-03 17:29:08
前言 又是一个夜黑风高的晚上，带上无线耳机听一曲。突然很感慨一句话： 生活就像心电图，一帆风顺就证明你挂了。 就如同我们干运维的，觉得很简单的事情，有时候能干出 无限可能 。还是言归正传吧，这一次我们来说说stringhash分区算法。 1.hash分区算法 2.stringhash分区算法 3.enum分区算法 4.numberrange分区算法 5.patternrange分区算法 6.date分区算法 7.jumpstringhash算法 StringHash分区算法的配置 < tableRule name = " rule_hashString " > < rule > < columns > name </ columns > < algorithm > func_hashString </ algorithm > </ rule > </ tableRule > < function name = " func_hashString " class = " StringHash " > < property name = " partitionCount " > 3,2 </ property > < property name = " partitionLength " > 3,4 </ property > < property name = " hashSlice

How to convert text to phpbb hash?

由 烂漫一生 提交于 2020-01-03 17:05:10
问题 I am trying to convert a test password (testing4) into a phpbb3 hash. This is the code I have tried: <?php /** * * @package phpBB3 * @version $Id: v3_dbal.xml 44 2007-07-25 11:06:55Z smithy_dll $ * @copyright (c) 2005 phpBB Group * @license http://opensource.org/licenses/gpl-license.php GNU Public License * */ /** * @ignore */ define('IN_PHPBB', true); include ("functions_phpbb.php"); $data['new_password'] = "testing4"; $user_row = array( 'user_password' => phpbb_hash($data['new_password']) )
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