Why does regex replacement not remove empty lines?

[#1]

The purpose is to download web content, keep the visible content, and remove lines with only Spaces.
I use the following JSL but can't remove blank lines?

Thanks!

u = "https://www.jmp.com/support/help/zh-cn/17.2/jmp/jsl-terminology.shtml";
txt = Load Text File( u );
a = Length( txt );
t1 = Regex( txt, "<(.[^>]{0,})>", "", globalreplace );
t2 = Regex( t1, "  ", "", globalreplace );
t2 = Regex( t2, "^( {0,})\!n", "", globalreplace );
t2 = Regex( t2, "\!n\!n", "", globalreplace );

[#2]

The same JSL can replace such empty lines, I do not know what went wrong?

Thanks!

txt =
"-->\!n\!n\!n\!nJSL Terminology\!n\!n\!n\!n\!n\!n\!nScripting Guide > Introduction to Writing JSL Scripts > JSL Terminology";
t1 = Regex( txt, "\!n\!n+", "", globalreplace );

[#3]

I used hex(t2) to see what was left in the string:

...0A0D0A0D0AE69CACE7BD91E7AB99E59CA8E590AFE794A8204A
61766153637269707420E79A84E68385E586B5E4B88BE69588E69E
9CE69C80E4BDB3E380820D0A0D0A0D0A0D0A0D0A0D0A0D0A0D0A"

The 0D0A pairs are CR LF pairs. \!n is JMP's escape for LF. I'd use this regex to match a run of any mix-and-match of CR and LF:

t2 = Regex( t2, "[\n\r]+", "", globalreplace );

Regex does not use the ! in the escape.

[#4 · Accepted solution]

...and typically, I'd replace runs of white space with

t2 = Regex( t1, "[ \n\r]+", " ", globalreplace );

(a space is also in the character set, and the replacement is a space) to keep the output a little more like the input, with the runs of white space compressed to a single space. (I removed the other t2= statements as well.)

   Expression 2: Sum = 0; For( i = 1, i <= 10, i++, 	Sum += i; 	Sh
ow( i, Sum ); ); You can format your script in any way that you like. However, th
e script editor can also format your script for you. The Scripting Guide uses th
e script editor’s default formatting for capitalization, spaces, returns, tabs, and s
o on. See Work with the Script Editor for more information about using the scri
pt editor. Note: The only white space exception is two-character operators (suc
h as <= or ++). The operators cannot be separated by a space. 需要更多信
息？有问题？从 JMP 用户社区得到解答 (community.jmp.com). 本网站在
启用 JavaScript 的情况下效果最佳。 ";

[#5]

or even this

t2 = Regex( t1, "\s+", " ", globalreplace );

which uses regex "match any white space" \s which probably includes a few other characters like form-feed that are unlikely to occur.

[#6]

Thank Craige!

Your help helped me further learn how JMP handles regex.Thank you so much for your time!
But the complicated ones don't:
For example, this JSL download txt

How can I match <">JSLString"> across multiple lines before the first </p>?
Replace it with something like this.txt has many places like this, need to use JSL implementation.

[#7]

• I tried EmEditor can implement. But JSL's did not succeed.

Thanks Experts!

[#8]

JSLString.+?</p>

[#9]

That looks like it should work. I'd need a complete example to understand what it is doing.

The JSL regex function . (period) always matches a newline, or any other character. + (plus) means repeat the . one or more times.

The reason you want to use .+? is to reluctantly(as few as possible) match one or more characters. Without the ? (question mark) the .+ would be greedy(as many as possible) and probably skip forward too far.

[#10]

Thank Craige!

I want to capture and automatically translate JMP online help content about JSL into Chinese.

		u = "https://www.jmp.com/support/help/zh-cn/17.2/#page/jmp/jsl-terminology.shtml";
		txt = Load Text File( u );
		t1 = Regex( txt, "<(.[^>]{0,})>", "", globalreplace );
		t2 = Regex( t1, "[ \n\r][ \n\r]+", "\!n  ", globalreplace );

However, the section about JSL code in the help document does not need to be translated, want to use the keyword

"JSLOperatorName" in the web source code, and the first </p> after it to mark the scope of the code that does not need to be translated.
Since sections of JSL code on the same page may span multiple lines, JSL regex is used to automatically recognize tags.