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Update DynamoDB Atomic Counter with Python / Boto

由 北战南征 提交于 2019-12-09 09:53:59
问题 I am trying to update an atomic count counter with Python Boto 2.3.0, but can find no documentation for the operation. It seems there is no direct interface, so I tried to go to "raw" updates using the layer1 interface, but I was unable to complete even a simple update. I tried the following variations but all with no luck dynoConn.update_item(INFLUENCER_DATA_TABLE, {'HashKeyElement': "9f08b4f5-d25a-4950-a948-0381c34aed1c"}, {'new': {'Value': {'N':"1"}, 'Action': "ADD"}}) dynoConn.update_item

How to program a vote up system?

由 孤者浪人 提交于 2019-12-09 07:55:17
问题 I am in the very beginnings of teaching myself php. I am giving myself micro projects to push myself. Thus far I have a MYSQL database, created through a php form. One Column is for karma. I have the values of the database table display in an html table, and at the end of each row, I would like a click on a hyperlink, lets say a plus sign, to increase that row's karma level by 1. Then the plus sign would go away. I should that each row has an auto increment integer as a primary key. 回答1: For

Unable to set incremental variable in Jmeter

由 故事扮演 提交于 2019-12-09 03:50:55
问题 Here is my simple Jmeter test plan. User Parameters look like this: I'm simply calling one endpoint, reading the response body and according to found IDs with the help of Regex Extractor I'm calling another endpoint. ForEach loop helps make sure for all the found IDs same endpoint is called with ID as parameter in the Path. What I'm trying to achieve with Another HTTP Request inside ForEach loop is to read the response, and if body contains Monday , increment User Parameter Monday by 1, same

Access SQL how to make an increment in SELECT query

由 别等时光非礼了梦想. 提交于 2019-12-08 22:27:31
问题 I Have an SQL query giving me X results, I want the query output to have a coulmn called count making the query somthing like this: count id section 1 15 7 2 3 2 3 54 1 4 7 4 How can I make this happen? 回答1: Alright, I guess this comes close enough to constitute an answer: the following link specifies two approaches: http://www.techrepublic.com/blog/microsoft-office/an-access-query-that-returns-every-nth-record/ The first approach assumes that you have an ID value and uses DCount (similar to

Preprocessor facility __COUNTER__ in Visual C++

由 孤人 提交于 2019-12-08 19:14:06
问题 I need to generate a series of sequential numbers throughout my code at compile time. I tried "__COUNTER__" in a way like this: void test1() { printf("test1(): Counter = %d\n", __COUNTER__); } void test2() { printf("test2(): Counter = %d\n", __COUNTER__); } int main() { test1(); test2(); } And the result was perfect as I expected: test1(): Counter = 0 test2(): Counter = 1 Then I spread "__COUNTER__" out in different .cpp files: In Foo.cpp: Foo::Foo() { printf("Foo::Foo() with counter = %d\n",

Is TTL for Cassandra counter column family supported?

由 北慕城南 提交于 2019-12-08 17:14:17
问题 Does Cassandra support TTL for the Counter column family? Specifically we use Hector as a client to Cassandra and I didn't find any API receiving TTL as a parameter. At least HFactory.createCounterColumn doesn't have TTL argument. 回答1: No. TTL expiration does not exist for counter columns. See CASSANDRA-2103 for background on why this feature doesn't make sense for Cassandra counter columns. 来源： https://stackoverflow.com/questions/19752308/is-ttl-for-cassandra-counter-column-family-supported

pycrypto error…ImportError: cannot import name Counter

由 ⅰ亾dé卋堺 提交于 2019-12-08 14:49:29
I am trying to design AES CTR encryption/ decryption program in python using pycrypto++. But every time I am running below code: decryptor = AES.new(key, AES.MODE_CTR, counter=Counter.new(64, prefix=nonce)) I am getting below error: Traceback (most recent call last): File "aes-ctr.py", line 3, in <module> from collections import Counter ImportError: cannot import name Counter nonce is given by me.Please help me. My python version is 2.7.3 I can think of two things that may cause this. Either you've made a file called "collections.py" and it's hiding the library module of the same name. If so,

Neo4j and Php handle counter within transaction

由 点点圈 提交于 2019-12-08 10:00:24
问题 Well scenario is like this: I create a one node called counter node . Its initial value is 0 and incremented as user create its account on my website. So there are three operation happen to operate this: Read counter node value Do some logic in php . Here like +1 to previous value of counter node Write new value of counter node Now problem is, If two or more users are coming exactly same time and creating such a condition that Before first user write new value to counter node , it is being

Enable button when counter reaches zero

由 杀马特。学长 韩版系。学妹 提交于 2019-12-08 05:34:25
I have a button its disabled and i want to put a counter inside it, what i want to do is when the counter reaches zero it get enabled, how can i do that? in the code below the counter doesn't appear inside the button and i don't want the reset button i just want the button to be enabled when it reaches zero, here is what i have tried so far: function Countdown() { this.start_time = "00:30"; this.target_id = "#timer"; this.name = "timer"; this.reset_btn = "#reset"; } Countdown.prototype.init = function() { this.reset(); setInterval(this.name + '.tick()',1000) } Countdown.prototype.reset =

Enable button when counter reaches zero

由 雨燕双飞 提交于 2019-12-08 03:28:20
问题 I have a button its disabled and i want to put a counter inside it, what i want to do is when the counter reaches zero it get enabled, how can i do that? in the code below the counter doesn't appear inside the button and i don't want the reset button i just want the button to be enabled when it reaches zero, here is what i have tried so far: function Countdown() { this.start_time = "00:30"; this.target_id = "#timer"; this.name = "timer"; this.reset_btn = "#reset"; } Countdown.prototype.init =
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