backspace

how to check for the “backspace” character in C

由 江枫思渺然 提交于 2019-11-27 08:38:38
I'd like to know how to check if a user types the "backspace" character. I'm using the getch() function i.e. "key = getch()" in my C program and i'd like to check when backspace is pressed. the line: if(key = '\b') { .... doesn't work. The problem with reading Backspace is that most terminals are 'cooked' in that keys like backspace are handled by the terminal driver. However, the curses function getch() can read the backspace as it's not tied to the terminal. Edit I just noticed your code is using getch() for input. I ran a little test program and getch() returns 127 when you hit backspace.

How to block editing on certain part of content in CKEDITOR textarea?

由 主宰稳场 提交于 2019-11-27 06:17:57
问题 I have my CKEDITOR form prepopulated with hidden table which is being submitted together with user inputed text. This works fine, but sometimes user presses backspace too many times and deletes the hidden table. Is there a way to block editing on this hidden table inside ckeditor textarea? So when user presses backspace the hidden table isn't affected and stays in. As soon as CKEDITOR instance is ready this source (bellow) is put inside CkEditor Textarea (using setData() attribute) and User

vim backspace leaves ^?

由 ♀尐吖头ヾ 提交于 2019-11-27 00:00:33
问题 In Vim, when I hit the backspace key in the insert mode, it leaves ^? character and does not delete the character it is suppose to delete. I have the following in my .vimrc syntax on set number set expandtab set incsearch set nocompatible set backspace=indent,eol,start fixdel This happens in the command mode too. When I wrongly type W instead of w to save, I press backspace key and it gives me the following: :W^? Any idea on whats wrong and how to fix it?! UPDATE: before posting this question

jQuery: keyPress Backspace won't fire?

由 巧了我就是萌 提交于 2019-11-26 21:40:16
I wonder what I'm doing wrong: $(".s").keypress(function(e) { switch (e.keyCode) { case 8: // Backspace //console.log('backspace'); case 9: // Tab case 13: // Enter case 37: // Left case 38: // Up case 39: // Right case 40: // Down break; default: doSearch(); } }); I want my doSearch() function also to be fired when I hit the Backspace key. At the moment absolutely nothing happens when I press Backspace in Chrome and Safari. any ideas? Use keyup instead of keypress . This gets all the key codes when the user presses something Rob I came across this myself. I used .on so it looks a bit

Backspace character weirdness

由 我的未来我决定 提交于 2019-11-26 17:01:37
问题 I wonder why backspace character in common Linux terminals does not actually erase the characters, when printed (which normally works when typed).. This works as expected: $ echo -e "abc\b\b\bxyz" xyz ( \b evaluates to backspace, can be inserted also as Ctrl + V Ctrl + H - rendered as ^H ( 0x08 )) but when there are less characters after the backspaces, the strange behavior is revealed: $ echo -e "abc\b\b\bx" xbc it behaves like left arrow keys instead of backspace: $ echo -e "abc\e[D\e[D\e

How to get backspace \\b to work in Eclipse's console?

由 走远了吗. 提交于 2019-11-26 14:40:56
I'm creating a little Java application which should have a progress indicator with percentages. In every loop it uses backspace \b to remove the displayed progress before displaying the next percentage. Here's a simplified example: public static void main(String[] args) throws Exception { System.out.print("Progress: "); for (int percentage = 0; percentage < 100; percentage++) { System.out.print(percentage + "%"); Thread.sleep(10); // Stub for "long running task". int length = String.valueOf(percentage).length() + 1; while (length-- > 0) { System.out.print('\b'); } } System.out.println(

how to check for the “backspace” character in C

由 左心房为你撑大大i 提交于 2019-11-26 11:15:14
问题 I\'d like to know how to check if a user types the \"backspace\" character. I\'m using the getch() function i.e. \"key = getch()\" in my C program and i\'d like to check when backspace is pressed. the line: if(key = \'\\b\') { .... doesn\'t work. 回答1: The problem with reading Backspace is that most terminals are 'cooked' in that keys like backspace are handled by the terminal driver. However, the curses function getch() can read the backspace as it's not tied to the terminal. Edit I just

The “backspace” escape character &#39;\b&#39;: unexpected behavior?

由 拈花ヽ惹草 提交于 2019-11-26 08:50:47
问题 So I\'m finally reading through K&R, and I learned something within the first few pages, that there is a backspace escape character, \\b . So I go to test it out, and there is some very odd behavior: #include <stdio.h> main () { printf(\"hello worl\\b\\bd\\n\"); } The output is hello wodl Can anyone explain this? 回答1: Your result will vary depending on what kind of terminal or console program you're on, but yes, on most \b is a nondestructive backspace. It moves the cursor backward, but doesn

jQuery: keyPress Backspace won&#39;t fire?

由 最后都变了- 提交于 2019-11-26 07:59:32
问题 I wonder what I\'m doing wrong: $(\".s\").keypress(function(e) { switch (e.keyCode) { case 8: // Backspace //console.log(\'backspace\'); case 9: // Tab case 13: // Enter case 37: // Left case 38: // Up case 39: // Right case 40: // Down break; default: doSearch(); } }); I want my doSearch() function also to be fired when I hit the Backspace key. At the moment absolutely nothing happens when I press Backspace in Chrome and Safari. any ideas? 回答1: Use keyup instead of keypress . This gets all

How to get backspace \b to work in Eclipse&#39;s console?

由 家住魔仙堡 提交于 2019-11-26 05:56:53
问题 I\'m creating a little Java application which should have a progress indicator with percentages. In every loop it uses backspace \\b to remove the displayed progress before displaying the next percentage. Here\'s a simplified example: public static void main(String[] args) throws Exception { System.out.print(\"Progress: \"); for (int percentage = 0; percentage < 100; percentage++) { System.out.print(percentage + \"%\"); Thread.sleep(10); // Stub for \"long running task\". int length = String
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