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New to learning python; why is the print for this for-loop different when I use a list comprehension? how do i make the loop be the same?

from my understanding shouldn't the print for X be the same on both? the answer i need is the one that comes from the ... list: x=[i-1] print(x) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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date - How to create pandas.date_range() for each row from column "start_date" and column "end_date"?

I have a df like: id | start_date | end_date | price 1 | 2020-10-01 | 2020-10-3 | 1 1 | 2020-10-03 ... "end_date", frequency="d", drop=False, ) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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jbutton - Java Calculator Errors

I am working on a simple calculator in JAVA as i'm trying to experiment with a GUI. I have run into some errors ... .main); frame.pack(); } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Python methods from csv

I am working on an assignment where I create "instances" of cities using rows in a .csv, then use these instances ... the code, not the shell? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Boolean Or containing Ternary conditional operation doesn't get short-circuited

In general, the short circuit or operator || ignores the right side of the or if the left side ... specification that handles this case? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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sql - Change the color of the sample line to apex oracle

I have a table with a list of car numbers "Auto numbers". They are reflected in an interactive report. Some ... in the Info Cars table. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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sortedset - ZRANGESTORE prior Redis 6.2.0

Basically I would like to store the top 5 from a sorted set in different set. In redis 6.2 I can do ... is the alternative in lower versions? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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android - How to make a ListActivity with custom List Item with nested clickable Button

now i have a activity, that shows a list of usernames. OK it works. But that i need is to show a custom listview item with ... (i, 0); } }); } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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scala - Time and space complexity using Tail recursion

Can anyone please help me to understand the time and space complexity of algo to balance parenthesis def ... complexity can be calculated See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Frame animation problems android

I am stuck showing frame animation in android. My problem is that I have to animate 36 images. The smallest ... . Smallest image: Last image: See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php - i want to display this result using codeigniter

i have a table named exam_time_table. i want to get the time table of each class. i tried to get the result.but ... echo $exam->extt_date; } ?> See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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r - First time working with interactive plots in ggplotly, would like some feedback on my plot

This is my first time working with ggplot2/ggploty() and would like some feedback as to what I could do ... 1.8927344640384, 2.79338768171436, 2.59559562977408, 2.79338768171436, 2...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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regex - How to use "MatchEvaluator" function to reduce coding?

I'm trying to search the regular expression pattern and, if it matches, find whether the value of that pattern exists ... p> </sec> </sec> See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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android - Doing background stuff on a different UI

I have designed an app that gets the network information and updates the UI every 5 seconds. It is advised to ... ().execute(); Thanks all See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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parsing - Java - Divide text into chunks of n-bytes

So I am kinda stuck on a program where I have to read a text file, using FileInputStream and divide that text ... .printStackTrace(); } } } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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android - Method onDestroy() doesn't work

When I run my app, all the checkboxes are checked in my ListView but I don't want them checked ... ; } public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Selenium, python dynamic table

I'm creating a robot with selenium that get all info from agencies in Brasil, i've alredy done the permutation click ... 20 21 22 23 24 25 26 See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Java: Generating a random double between the range of a negative double and a positive double

I am not very familiar with how to alter the range of both Math.random or a new Random() to generate a ... its value. So ignore that please. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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audio - Pyo in Python: name 'Server' not defined

I recently installed Pyo, and I entered Python 3.6 and typed from pyo import * s = Server().boot() s.start() ... how do I play the audio file? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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C++ tbb flow graph, multifunction_node giving incomplete type error

Far as I understand, incomplete type error happens when there's forward declaration without full specification of ... but still same problem. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - If a Map has only one member, how to get it without looping if you don't know the key?

Is it true the only way to get value of a Map when it has only one member and you don't know the key ... shorthand myMap.item(0) sort of thing? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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regex - Pattern matching dates

I'm having troubles trying to match a pattern of dates. Any of the following dates are legal: - 121212 - 4 9 12 ... I just want $1 to be 121212. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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sql - Error Message: Concat function requires 2 arguments

I have the following code which works fine when run as a Query but returns error message when run as ... .[WARD_OF_RESIDENCE_CODE]) =e.WD14CDO See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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ios - AudioQueue volume too low

I am having a problem when using AudioQueue to play PCM data. The volume is low when using the iPhone' ... , kAudioQueueParam_Volume, 1.0); See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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matlab - How to plot n dimensional matrix?

I want to visualize my matrix with the computed mean of that matrix. And I want to plot that points and the mean ... is -->the mean / average See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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235 views

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Need to convert custom timestamp to different format in Objective-C iOS

I have a string "2012-06-04" and am having a hard time converting it to: June 4, 2012. Is there a quick ... that shows how to do that? Thanks See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Cloud functions not offsetting date for firestore query

I have a cron job that runs @12PM everyday. It's supposed to grab all the documents in a collection that ... not seeing the change being set. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to programatically convert the text file to a custom made specific excel format with nice tabulated grid

I would like to convert my text file https://imageshack.com/i/eyRUOp6fj to a specific excel format as shown here ... please!!! Thanks a lot. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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