backspace

Backspace does not seem to work in python

由 ぃ、小莉子 提交于 2021-02-08 07:43:47
问题 network={1:[2,3,4],2:[1,3,4], 3:[1,2], 4:[1,3,5], 5:[6,7,8], 6:[5,8],7:[5,6], 8:[5,6,7]} str1='network.csv' output = open(str1,'w') for ii1 in network.keys(): output.write(repr(ii1)+":[") for n in network[ii1]: output.write(' %s,'%(repr(n))) output.write('\b'+']\n') output.close() What I expect is something like: 1:[ 2, 3, 4] 2:[ 1, 3, 4] 3:[ 1, 2] 4:[ 1, 3, 5] 5:[ 6, 7, 8] 6:[ 5, 8] 7:[ 5, 6] 8:[ 5, 6, 7] but what I get is: 1:[ 2, 3, 4,] 2:[ 1, 3, 4,] 3:[ 1, 2,] 4:[ 1, 3, 5,] 5:[ 6, 7, 8,] 6

Backspace deletes whole span element

由 送分小仙女□ 提交于 2021-02-07 19:25:21
问题 Is it possible to prevent span deletion with backspace? <div class="form-control" contenteditable="true"> <span class="correct-answer"> <span contenteditable="false">The correct answer is (A) 1 to 2. </span> <span class="sentence" num="11">dgsdgsg. sgsdgs sgsgs.</span> </span> </div> Example: http://jsfiddle.net/pvj64px9/1/ The correct answer is (B) 2 to 3. and `Choice A (1 to 2) is incorrect. ` must not be deleted. 回答1: update your parent container to have contenteditable="false" <div id=

Python strings: backspace at the end of string behaves differently

由 我的梦境 提交于 2020-06-15 06:23:33
问题 I'm experimenting with the backspace character \b in Python strings. I tried this: >>> s = "The dog\b barks" >>> print(s) The do barks This behaves as expected. The g character disappears because of the \b backspace. Now I try this: >>> s = "The dog barks\b" >>> print(s) The dog barks Strange... the s character didn't disappear. Why? Note : I work on a Windows 10 PC and did these experiments in the Windows cmd prompt (the terminal). I run Python 3.6 回答1: That isn't a behavior of python but

Python strings: backspace at the end of string behaves differently

由 半腔热情 提交于 2020-06-15 06:19:33
问题 I'm experimenting with the backspace character \b in Python strings. I tried this: >>> s = "The dog\b barks" >>> print(s) The do barks This behaves as expected. The g character disappears because of the \b backspace. Now I try this: >>> s = "The dog barks\b" >>> print(s) The dog barks Strange... the s character didn't disappear. Why? Note : I work on a Windows 10 PC and did these experiments in the Windows cmd prompt (the terminal). I run Python 3.6 回答1: That isn't a behavior of python but

Trigger backspace key in jQuery

由 我只是一个虾纸丫 提交于 2020-05-15 08:07:10
问题 How can I trigger the backspace key event in jQuery? The following example isn't working: var e = jQuery.Event("backspace", { keyCode: 8 }); $("#myarea").trigger( e ); 回答1: You can't actually trigger it. You could, for example, remove the last character from a certain input, but you can't trigger the actual key. Example: var str = $('#input').val(); $('#input').val(str.substring(0, str.length - 1)); 回答2: You can't trigger the backpace key. With the jquery caret plugin, you can simulate the

Trigger backspace key in jQuery

由 末鹿安然 提交于 2020-05-15 08:07:10
问题 How can I trigger the backspace key event in jQuery? The following example isn't working: var e = jQuery.Event("backspace", { keyCode: 8 }); $("#myarea").trigger( e ); 回答1: You can't actually trigger it. You could, for example, remove the last character from a certain input, but you can't trigger the actual key. Example: var str = $('#input').val(); $('#input').val(str.substring(0, str.length - 1)); 回答2: You can't trigger the backpace key. With the jquery caret plugin, you can simulate the

关于屏蔽浏览器退格键的几个尝试

由 痞子三分冷 提交于 2020-02-29 12:49:06
大部分浏览器在浏览网页时，按退格键（BackSpace）会触发后退操作。但我希望尝试下如何屏蔽此功能。 我使用的操作系统为Win7，我用于测试的三个浏览器版本信息如下： 1、Internet Exlorer 8.0.7601.17514（后面简称IE8） 2、Google Chrome 50.0.2661.102 m（后面简称Chrome） 3、Firefox 46.0.1（后面简称Firefox） 从网上搜集的资料表明，可以通过添加js代码的方式屏蔽退格键。 如有页面page1.html代码如下： <html> <head> <title>测试页面1</title> </head> <body> <input type="button" id="openNewPage" value="打开新页面" onclick="openNewPage();" /> <script> function openNewPage() { window.location.href = "file:///C:/Users/Tsybius/Desktop/ShieldBpTest/page2.html"; } </script> </body> </html> 该页面可以打开另一个页面page2.html： <html> <head> <title>测试页面2</title> </head> <body

What is the use of '\b' (backspace)

由 笑着哭i 提交于 2020-01-23 08:30:09
问题 I'm taking a Python class right now, and I just learned about the backspace character. Like newline (\n), backspace is a special character with ASCII code 8. My teacher couldn't think of a reason to use that, but I'm curious as to how it's used. Maybe just historical reasons? When I tried print("Hellow\b World") , I got just got what I expected: Hello World . What's the reason for the backspace character, and how might it be used? Edit: I am aware that it isn't python specific, but when

What is the purpose of Unicode “Backspace” U+0008?

由 ╄→尐↘猪︶ㄣ 提交于 2020-01-12 04:48:08
问题 What is the purpose of the Unicode Character 'BACKSPACE' (U+0008) in programming? What applications can it be used for? 回答1: Um, it's a backspace character. On output to a terminal, it typically moves the cursor one position to the left (depending on settings). On input, it typically erases the last entered character (depending on the application and terminal settings), though the DEL / DELETE character is also used for this purpose. Typically it can be entered by pressing Backspace or

clear the contents of the editText when long press on Back Space Key

由 点点圈 提交于 2020-01-07 05:12:08
问题 Because my editext is the string format it doesn't clear all the text when i long press on the backspace key. so i am looking for solution to clear all text when long press on the backspace key ?? 回答1: Try this @Override public boolean onKeyLongPress(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_DEL) { textView.setText(""); return true; } return super.onKeyLongPress(keyCode, event); 回答2: You can do it by overriding onKeyLongPress() like @Override public boolean onKeyLongPress
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