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javascript - 合并/展平数组(Merge/flatten an array of arrays)

I have a JavaScript array like: (我有一个像这样的JavaScript数组：) [["$6"], ["$12"], ["$25"], ["$25"], ["$18"], ["$22"], ["$10 ... 数组：) ["$6", "$12", "$25", ...] ask by Andy translate from so...

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

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278 views

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python - 使用Python和Numpy创建原始图像的图像图块（m * n）(Creating image tiles (m*n) of original image using Python and Numpy)

I am using numpy to create tiles of (224*224) from my 16-bit tiff image (13777*16004). (我正在使用numpy从我的16位tiff图像（13777 * ... 的结果，任何人都可以帮忙???) ask by Victor Alhassan translate from so...

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

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393 views

1 answer

mysql - 我可以将多个MySQL行连接到一个字段中吗？(Can I concatenate multiple MySQL rows into one field?)

Using MySQL , I can do something like: (使用MySQL ，我可以做类似的事情：) SELECT hobbies FROM peoples_hobbies WHERE person_id = 5; My ... 人知道如何做到这一点吗？) ask by Dean Rather translate from so...

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

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343 views

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regex - 如何针对以下情况编写正则表达式(How do I write a regex for the following condition)

Should be at least 4 characters (至少应包含4个字符) Should start with a character [a-zA-Z] (应以字符[a-zA-Z]开头) Should not end with ... 且我不确定如何设置至少4个字符约束 ) ask by Ranjandas translate from so...

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

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403 views

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java - 如何从Java中的字符串值获取枚举值？(How to get an enum value from a string value in Java?)

Say I have an enum which is just (说我有一个枚举) public enum Blah { A, B, C, D } and I would like to find the enum value ... use this? (如果是这样，我将如何使用它？) ask by Malachi translate from so...

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

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268 views

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postgresql - Postgres SQL性能上限(Postgres SQL performance ceiling)

I have a flat table with ~4M rows and a multiindex on 5 columns. (我有一个带有?4M行和5列上的multiindex的平面表 )Simple ... .083 ms Execution time: 0.309 ms ask by Bishonen_PL translate from so...

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

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c# - 当覆盖Equals方法时，覆盖GetHashCode为什么很重要？(Why is it important to override GetHashCode when Equals method is overridden?)

Given the following class (鉴于以下课程) public class Foo { public int FooId { get; set; } public string FooName { get; ... (重写GetHashCode为什么很重要？) ask by David Basarab translate from so...

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

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472 views

1 answer

css - Visual Studio代码CSS缩进和格式(Visual studio code CSS indentation and formatting)

I'd like to know if there is any way to activate auto indent a CSS file in visual studio code with the shortcut ALT + SHIFT + F ... ，但奇怪的是在CSS上却不能 ) ask by A. DC translate from so...

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

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494 views

1 answer

java - 检查字符串是否不为空且不为空(Check whether a string is not null and not empty)

How can I check whether a string is not null and not empty? (如何检查字符串是否不为null也不为空？) public void doStuff(String str) { if ... empty string */ } /* ... */ } ask by translate from so...

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

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341 views

1 answer

git - 如何删除子模块？(How do I remove a submodule?)

How do I remove a Git submodule? (如何删除Git子模块？) By the way, is there a reason I can't simply do git ... git submodule rm whatever吗？) ask by R. Martinho Fernandes translate from so...

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

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260 views

1 answer

.net - 分析图像的颜色(Analyze colors of an Image)

I have part of an Image cropped out, and 2 Color Ranges (H/S/L) defined via 12 trackbars. (我裁剪了一部分图 ... End If Next crop.UnlockBits(bdata) ask by sharkyenergy translate from so...

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

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251 views

1 answer

php - 在PHP中转换日期格式(Convert a date format in PHP)

I am trying to convert a date from yyyy-mm-dd to dd-mm-yyyy (but not in SQL); (我正在尝试将日期从yyyy-mm-dd为dd-mm-yyyy ... ) How is this possible? (这怎么可能？) ask by matthy translate from so...

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

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409 views

1 answer

java - 读取多个值并将其存储在HashMap Apache POI中(Read and store the multiple value in HashMap Apache POI)

In Excel I have data like below, where first row is header. (在Excel中，我有如下数据，其中第一行是标题 ) ProductName ... PROTECTION -> CREDIT LIFE, RETRENCHMENT. ask by Deepak translate from so...

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

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333 views

1 answer

r - 更改数据框的列名称(Changing column names of a data frame)

I have a data frame called "newprice" (see below) and I want to change the column names in my program in R. (我有一个名为 newprice 的数 ... ? (有人可以帮我解决这个问题吗？) ask by Son translate from so...

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

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470 views

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linux - 如何基于通配符匹配递归地找到当前文件夹和子文件夹中的所有文件？(How can I recursively find all files in current and subfolders based on wildcard matching?)

如何基于通配符匹配递归地找到当前文件夹和子文件夹中的所有文件？ ask by john translate from so...

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

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394 views

1 answer

python - 如何删除尾随换行符？(How can I remove a trailing newline?)

Perl的chomp函数在Python中的等效功能是什么，如果是换行符，它将删除字符串的最后一个字符？ ask by translate from so...

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

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805 views

1 answer

visual-studio - 如何在Visual Studio中自动格式化代码？(How do you auto format code in Visual Studio?)

我知道Visual Studio可以自动格式化以使我的方法和循环正确缩进，但是我找不到该设置。 ask by user719550 translate from so...

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

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412 views

1 answer

python - @classmethod和@staticmethod对初学者的意义？ [重复](Meaning of @classmethod and @staticmethod for beginner? [duplicate])

This question already has an answer here: (这个问题在这里已有答案：) What is the difference between @staticmethod and @classmethod? (@staticmethod和 ... 给我一个相应的C ++示例 ) ask by translate from so...

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

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477 views

1 answer

ios - 将文本垂直对齐到UILabel中的顶部(Vertically align text to top within a UILabel)

I have a UILabel with space for two lines of text. (我有一个UILabel带有两行文本的空间 )Sometimes, when the text is too short, this ... 对齐文本以使其始终位于UILabel的顶部？) ask by Stefan translate from so...

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

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337 views

1 answer

javascript - 对象的映射功能（而不是数组）(map function for objects (instead of arrays))

I have an object: (我有一个对象：) myObject = { 'a': 1, 'b': 2, 'c': 3 } I am looking for a native method, similar to ... Node.JS使用它，所以我不在乎跨浏览器的问题）) ask by Randomblue translate from so...

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

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428 views

1 answer

python - 如何在字符串中搜索没有空格的单词(How to I search a string for words with no spaces)

I am trying to find out how to read a string for names with no spaces ex. (我正在尝试找出如何读取不带空格的名字的字符串 )robbybobby I want it ... ，只有在以后有空格的情况下，它才会发现robby) ask by Xtyfi translate from so...

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

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398 views

1 answer

css - 使用Twitter Bootstrap 3将列居中(Center a column using Twitter Bootstrap 3)

How do I center a div of one column size within the container (12 columns) in Twitter Bootstrap 3 ? (如何在Twitter Bootstrap 3的容器（12列 ... （缩小直到容器宽度等于一列） ) ask by bsr translate from so...

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

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300 views

1 answer

sql - 如何在Oracle上使用AUTO_INCREMENT创建ID？(How to create id with AUTO_INCREMENT on Oracle?)

It appears that there is no concept of AUTO_INCREMENT in Oracle, up until and including version 11g. (直到并包括11g版，Oracle中似乎都没有 ... 类似于自动增量的列？) ask by Sushan Ghimire translate from so...

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

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836 views

1 answer

visual-studio - 我应该将Visual Studio .suo和.user文件添加到源代码管理中吗？(Should I add the Visual Studio .suo and .user files to source control?)

Visual Studio solutions contain two types of hidden user files. (Visual Studio解决方案包含两种类型的隐藏用户文件 )One is the solution .suo file ... 会自动创建新的用户文件吗？) ask by Ben Mills translate from so...

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

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458 views

1 answer

sql - 在SQL Server中将行有效地转换为列(Efficiently convert rows to columns in sql server)

I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need ... the result? (如何建立结果？) ask by tbag translate from so...

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

0 votes

354 views

1 answer

ios - Github使用分页搜索Api？(Github Search Api with Pagination?)

I want to use the Github search API Restfully in my iOS application to query public repositories based on 'language' (programming ... (我该如何使用它？) ask by Sagar translate from so...

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

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412 views

0 answers

docker - Docker映像存储在主机上的什么位置？(Where are Docker images stored on the host machine?)

I managed to find the containers under directory /var/lib/docker/containers , but I can't find the images. (我设法在目录/var/lib/ ... lib/docker下的目录和文件是什么？) ask by nemo translate from so...

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

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642 views

1 answer

android-studio - 如何在Android Studio中将“资产”文件夹放在哪里？(Where do I place the 'assets' folder in Android Studio?)

I am confused about the assets folder. (我对assets文件夹感到困惑 )It doesn't come auto-created in Android Studio, and ... 何在Android Studio中配置Assets目录？) ask by kalehv translate from so...

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

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