16892 Developer Q&A Community

asked Feb 5, 2021 in Others[杂七杂八] by ostack (1.4k points)

Welcome to Our Knowledge Sharing Community-Open, Learning,Share

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asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - 错误1046未选择数据库，如何解决？(Error 1046 No database Selected, how to resolve?)

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343 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python - 在Python中替换switch语句？(Replacements for switch statement in Python?)

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356 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

ruby-on-rails - 防止对特定操作进行ActiveRecord关联验证的最佳方法(Best way to prevent ActiveRecord association validations on specific actions)

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426 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

mysql - 如何获取MySQL数据库表的大小？(How to get the sizes of the tables of a MySQL database?)

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312 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

mysql - ＃1054-“ where子句”中的未知列“ tt.date”(#1054 - Unknown column 'tt.date' in 'where clause')

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470 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

xml - 如何在XML中注释掉一个标签块？(How do I comment out a block of tags in XML?)

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483 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

jquery - 如何在变更事件中使用广播？(How to use radio on change event?)

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334 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

flutter - 如何在离开闪屏之前显示确认对话框(How can I show confirm dialog before leave flutter screen)

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565 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python - 如何在迭代时从列表中删除项目？(How to remove items from a list while iterating?)

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366 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

php - 使用PHP刷新页面(Refresh a page using PHP)

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265 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python - 如何在Python中更改目录（cd）？(How do I change directory (cd) in Python?)

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225 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

java - Java Spring Bean依赖项注入conditionalOnBean(Java Spring Bean dependency injection, conditionalOnBean)

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362 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

mysql - 在一个mysqli查询中给出的年，周号和工作日时返回DATE(Return DATE when year, week number and weekday given in one mysqli query)

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357 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

jquery - 如何求和未知数量的td值(How to sum unknown number of td values)

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440 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

comments - 你如何在YAML中阻止评论？(How do you do block comments in YAML?)

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424 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

php - 我想使用php来使用简单的html dom抓取输入值readonly值，我一直得到空白的回报(I want to use php to scrape the input value readonly value using simple html dom, I keep getting a blank return)

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395 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

c# - 如何以及何时使用“异步”和“等待”(How and when to use ‘async’ and ‘await’)

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553 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

javascript - 不兑现承诺是不好的做法吗？(Is it bad practice to use a promise without reject?)

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284 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python - 将列表中的所有字符串转换为int(Convert all strings in a list to int)

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227 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

git - 如何删除所有已合并的Git分支？(How can I delete all Git branches which have been merged?)

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452 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python - Python - 使用2个值之间的数字创建列表？(Python - Create list with numbers between 2 values?)

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275 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

sql - 如何选择TOP 50 PERCENT的MIN值？(How to Select MIN value of TOP 50 PERCENT?)

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308 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

mysql - 无法启动mysql？不知道从哪里开始(Unable to start mysql? Not sure where to start)

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460 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

javascript - 使用多行单元格处理HTML表中的行和列(Manipulating rows and columns in HTML table with multi-row cells)

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332 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

html - 如何使用 <br> 在引导卡中标记？(How to use <br> tag in bootstrap card?)

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263 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

angularjs - Ctrl单击ng单击新选项卡中的打开页面(Ctrl click ng-click open page in new tab)

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421 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

python-3.x - 硒无法找到图标元素(Selenium unable to find element of icon)

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422 views 1 answer

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

git - 如何查看Git提交中的更改？(How to see the changes in a Git commit?)

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322 views 1 answer

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