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How to concatenate text from multiple rows into a single text string in SQL server?
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If you are on SQL Server 2017 or Azure, see Mathieu Renda answer.
I had a similar issue when I was trying to join two tables with one-to-many relationships. In SQL 2005 I found that XML PATH method can handle the concatenat...
Inline comments for Bash?
...`#another chance for a comment` \
xyz etc
And for pipelines specifically, there is a cleaner solution with no overhead
echo abc | # normal comment OK here
tr a-z A-Z | # another normal comment OK here
sort | # the pipelines are automatically continued
uniq ...
JoeDevCamera 扩展：在布局中显示相机预览，程序控制拍照与录像 · App Inventor 2 中文网
...按钮切换开始/停止）
when 按钮_录像.Click() {
if JoeDevCamera1.IsRecording() {
JoeDevCamera1.StopRecording()
} else {
JoeDevCamera1.StartRecording()
}
}
when JoeDevCamera1.RecordingStarted(videoPath) {
标签_状态.Text = join("开始录像：", videoPath)...
Remove all occurrences of char from string
...ent is regular expression, sometimes it won't work as expected, especially if this string comes from user input.
– vbezhenar
Jul 4 '12 at 8:50
9
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How can I scroll a web page using selenium webdriver in python?
...(0, document.body.scrollHeight);")
to scroll to the bottom of the page.
If you want to scroll to a page with infinite loading, like social network ones, facebook etc. (thanks to @Cuong Tran)
SCROLL_PAUSE_TIME = 0.5
# Get scroll height
last_height = driver.execute_script("return document.body.sc...
How can I inject a property value into a Spring Bean which was configured using annotations?
... Is systemProperties simply System.getProperties()? I guess if I want to inject my own properties into a Spring bean I need to define a <bean id="appProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> then read values from that into another bean u...
Android SQLite: nullColumnHack parameter in insert/replace methods
...oo;
That's not valid in SQLite. You have to have at least one column specified:
INSERT INTO foo (somecol) VALUES (NULL);
Hence, in the case where you pass an empty ContentValues to insert(), Android and SQLite need some column that is safe to assign NULL to. If you have several such columns to ...
Generating a SHA-256 hash from the Linux command line
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If you have installed openssl, you can use:
echo -n "foobar" | openssl dgst -sha256
For other algorithms you can replace -sha256 with -md4, -md5, -ripemd160, -sha, -sha1, -sha224, -sha384, -sha512 or -whirlpool.
...
In a git merge conflict, what are the BACKUP, BASE, LOCAL, and REMOTE files that are generated?
...nts of file before invoking the merge tool, will be kept on the filesystem if mergetool.keepBackup = true.
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What is the maximum length of a valid email address?
...strict the Path length to 256 characters or fewer.
The maximum length specified in RFC 5321 states:
The maximum total length of a reverse-path or forward-path is 256 characters.
RFC 3696 was corrected here.
People should be aware of the errata against RFC 3696 in particular. Three of the can...