hidden-characters


Remove invisible backspace characters from mysql data

蓝咒 提交于 2019-12-25 07:18:17
问题 I have the following invisible character in my dataset Which I believe is this character http://www.fileformat.info/info/unicode/char/0008/index.htm How do I remove this? I've tried UPDATE events SET `value` = TRIM(REPLACE(`value`, CONVERT(char(8) USING hp8), '')) 回答1: MySQL escape sequence for literal backspace character is \b . See "Special Character Escape Sequences" here: http://dev.mysql.com/doc/refman/5.7/en/string-literals.html If I needed to remove that character from a string column,

Determining if a Unicode character is visible?

安稳与你 提交于 2019-12-11 03:49:13
问题 I am writing a text editor which has an option to display a bullet in place of any invisible Unicode character. Unfortunately there appears to be no easy way to determine whether a Unicode character is invisible. I need to find a text file containing every Unicode character in order that I can look through for invisible characters. Would anyone know where I can find such a file? EDIT: I am writing this app in Cocoa for Mac OS X. 回答1: Oh, I see... actual invisble characters ;) This FAQ will

Join Statement omitting entries

喜你入骨 提交于 2019-12-02 16:08:31
问题 Using: Unix 2.6.18-194.el5 I am having an issue where this join statement is omitting values/indexes from the match. I found out the values are between 11-90 (out of about 3.5 Million entries) and I have tried to look for foreign characters but I may be overlooking something (Tried cat -v to see hidden characters). Here is the join statement I am using (only simplified the output columns for security): join -t "|" -j 1 -o 1.1 2.1 file1 file2> fileJoined file1 contents (first 20 values): 1 3 7

Join Statement omitting entries

与世无争的帅哥 提交于 2019-12-02 07:45:58
Using: Unix 2.6.18-194.el5 I am having an issue where this join statement is omitting values/indexes from the match. I found out the values are between 11-90 (out of about 3.5 Million entries) and I have tried to look for foreign characters but I may be overlooking something (Tried cat -v to see hidden characters). Here is the join statement I am using (only simplified the output columns for security): join -t "|" -j 1 -o 1.1 2.1 file1 file2> fileJoined file1 contents (first 20 values): 1 3 7 11 12 16 17 19 20 21 27 28 31 33 34 37 39 40 41 42 file2 contents (first 50 values so you can see

In Perl, how to remove ^M from a file?

左心房为你撑大大i 提交于 2019-11-30 12:40:46
问题 I have a script that is appending new fields to an existing CSV, however ^M characters are appearing at the end of the old lines so the new fields end up on a new row instead of the same one. How do I remove ^M characters from a CSV file using Perl? 回答1: ^M is carriage return. You can do this: $str =~ s/\r//g 回答2: Or a 1-liner: perl -p -i -e 's/\r\n$/\n/g' file1.txt file2.txt ... filen.txt 回答3: You found out you can also do this: $line=~ tr/\015//d; 回答4: Slightly unrelated, but to remove ^M

In Perl, how to remove ^M from a file?

谁说胖子不能爱 提交于 2019-11-30 02:46:29
I have a script that is appending new fields to an existing CSV, however ^M characters are appearing at the end of the old lines so the new fields end up on a new row instead of the same one. How do I remove ^M characters from a CSV file using Perl? ^M is carriage return. You can do this: $str =~ s/\r//g Or a 1-liner: perl -p -i -e 's/\r\n$/\n/g' file1.txt file2.txt ... filen.txt Alex Wong You found out you can also do this: $line=~ tr/\015//d; Roy Rico Slightly unrelated, but to remove ^M from the command line using Perl, do this: perl -p -i -e "s/\r\n/\n/g" file.name I prefer a more general

Display hidden characters in NSTextView

久未见 提交于 2019-11-27 14:10:52
问题 I am writing a text editor for Mac OS X. I need to display hidden characters in an NSTextView (such as spaces, tabs, and special characters). I have spent a lot of time searching for how to do this but so far I have not found an answer. If anyone could point me in the right direction I would be grateful. 回答1: Have a look at the NSLayoutManager class. Your NSTextView will have a layout manager associated with it, and the layout manager is responsible for associating a character (space, tab,

Removing hidden characters from within strings

不羁的心 提交于 2019-11-27 13:57:18
My problem: I have a .NET application that sends out newsletters via email. When the newsletters are viewed in outlook, outlook displays a question mark in place of a hidden character it can’t recognize. These hidden character(s) are coming from end users who copy and paste html that makes up the newsletters into a form and submits it. A c# trim() removes these hidden chars if they occur at the end or beginning of the string. When the newsletter is viewed in gmail, gmail does a good job ignoring them. When pasting these hidden characters in a word document and I turn on the “show paragraph

Removing hidden characters from within strings

笑着哭i 提交于 2019-11-26 22:23:22
问题 My problem: I have a .NET application that sends out newsletters via email. When the newsletters are viewed in outlook, outlook displays a question mark in place of a hidden character it can’t recognize. These hidden character(s) are coming from end users who copy and paste html that makes up the newsletters into a form and submits it. A c# trim() removes these hidden chars if they occur at the end or beginning of the string. When the newsletter is viewed in gmail, gmail does a good job

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