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Development Swift

How do you assign and unwrap an optional array object in Swift?

I’m trying to invert a binary tree in Swift using the iterative approach. Essentially I just keep looping through each node, and putting it into a stack array. This array should be an array of optional nodes. Here is my code: func invertTree(_ root: TreeNode?) -> TreeNode? { if root != nil { stack.append(root) } […]

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Development

Write lines up to matched string in python

I’ve the input file as : Input file: HEAD xxxxxxx xxxx ;;;;;;;;;;;;;;;; ……………… ;;;;;;;;;;;;; ………….. MODEL 1 ENDMDL ;;;;;;;;;;;;;;;; ……………… ;;;;;;;;;;;;; MODEL 2 ENDMDL ;;;;;;;;;;;;;;;; ……………… ;;;;;;;;;;;;; ………….. MODEL 3 ENDMDL Would like to match string “MODEL 2” and print only above lines Desired output: HEAD xxxxxxx xxxx ;;;;;;;;;;;;;;;; ……………… ;;;;;;;;;;;;; ………….. MODEL 1 ENDMDL […]

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Development

bash race condition using generated output file name

I am trying to generate output using a randomized file name. “Generating” is simulated with “cat” in this example: cat report.csv > “test_$(openssl rand -base64 102).csv” I often get an error like this: -bash: test_Q6eheRaVfktCTCfWSU/tjRNA1y+6juwlyuo1lEId/7HZTCQIE7/rt+/9MlTI+pjT 9It3l7FtBldMmaqHNWpspwCI5kCpR+s51RA2o9xAZ6BrZ+7UBR5atK9qWdSO/N/X BAnvDkGm.csv: No such file or directory The probability for this error is higher the higher the number of random […]

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Development

DatePicker’s selection is different from the returned date

The selection is 9/16/21, but the returned date is 9/16/20. The returned date is not synchronised somehow. There is nothing special here, it’s just standard usage of DatePicker. Is it a bug of DatePicker? How to workaround this issue? DatePicker(selection: $model.returnDate, in: model.returnDateRange, displayedComponents: .date) { Text(“Return Date”) } Full Source Code How to reproduce: […]

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Development

What resources are allocated to a medium sized business’s cloud implementation? [on hold]

Jump to the accepted answer to see why the question doesn’t actually have a distinct answer. And (LFMM) remember not to google too specifically when you don’t know what you’re looking for. When a business purchases 200 licenses and is using the enterprise Salesforce CRM, what resources are allocated to that instance, and what operations […]

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Development

What’s a good way to zero-out cudaMalloc’d data?

What’s a good way to zero-out cudaMalloc’d data? Assume using cudaMemset or cudaMemsetAsync from the CPU results in synchronization issues with other cuda API calls, forcing you to do something else. Edit 1 Someone mentioned that using a kernel instead of using a cudaMemsetAsync call could result in clearing the memory sooner. In the first […]

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Development MVC

How to get data join four tables with Spring mvc and MyBatis

I’m using Spring and MyBatis, I’m facing with the problem when join four tables to get data in JSP my model: User: public class User { private Long user_id; private GroupMaster group_id; private String login_name; private String password; private String full_name; private String full_name_kana; private String email; private String tel; private Date birthday; private boolean […]

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Development

Error with yarn start and ExecCommand.execute

I’m having an issue with running my script by using npm run start and yarn start. Below is the output: C:\Windows\System32\login>npm run start login-with-metamask@2.0.0 start C:\Windows\System32\login lerna exec yarn start –parallel Lerna v2.0.0-beta.20 Errored while running command ‘yarn’ with arguments ‘start’ in ‘@login-with-metamask/backend’ Errored while running ExecCommand.execute -4058 npm ERR! code ELIFECYCLE npm ERR! errno […]

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Development JSON

package.json configuration for library publish inside package in monorepo

I’m using lerna with yarn workspaces. I built my library with command yarn workspace @org/package-1 build:lib as mentioned below. dist folder is generated. After that I run npx lerna publish. But it fails saying there’s no package.json in dist folder Why does lerna needs to have package.json inside dist folder? How can I fix the […]

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Development

Process stopped in unexpected step. Make sure that you defined all necessary connections

I’m having a problem with a Condition in a workflow: The condition is: Sending pages to Approval that match the condition are working as expected and moving to the Approve step: However those that do not match the condition are getting stuck in the condition step and the email is not sent as expected: I’m […]