backspace

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

问题 I'm using Netbeans' bean form to create my GUI. I've added a keyTyped event to a JTextArea and I want to detect if the typed key is a Backspace . I'm using keyTyped event for other reasons so I cannot just use the keyPressed event. This is the generated code (and my if check): private void langArea1KeyTyped(java.awt.event.KeyEvent evt) { if(evt.getChar()== backspace) //how can I make this check? } evt.getKeyCode() always returns 0 independent of the typed key. evt.getKeyChar() simply deletes

问题 I'm using Netbeans' bean form to create my GUI. I've added a keyTyped event to a JTextArea and I want to detect if the typed key is a Backspace . I'm using keyTyped event for other reasons so I cannot just use the keyPressed event. This is the generated code (and my if check): private void langArea1KeyTyped(java.awt.event.KeyEvent evt) { if(evt.getChar()== backspace) //how can I make this check? } evt.getKeyCode() always returns 0 independent of the typed key. evt.getKeyChar() simply deletes

问题 I saw in another question that ( "\b" ) could be used to delete a character. However, when I tried \b it only put a space in between the character I was intending on deleting and the one after. Is there another way I could do backspace? (I'm trying to make a program that will write a word, delete it then rewrite a new one) 回答1: It depends on the terminal which is used and how it interprets the \b , e.g. print('Text: ABC\b\b\bXYZ') in the interactive console of PyCharm gives: Text: ABC XYZ but

问题 My backspace key in Eclipse Mars (4.5.0) works like the delete key: it deletes the right character instead of the left one. That's really confusing Maybe I accidentally used a shortcut key? I tried to restart Eclipse but it didn't work. I also tried to switch the key binding preferences to "Emacs" scheme before reverting to "Default" but that didn't work either. Any help appreciated, thank you! Edit: damn, I just found out that ctrl+x doesn't work any more either! 回答1: Got solved: Go to

问题 My backspace key in Eclipse Mars (4.5.0) works like the delete key: it deletes the right character instead of the left one. That's really confusing Maybe I accidentally used a shortcut key? I tried to restart Eclipse but it didn't work. I also tried to switch the key binding preferences to "Emacs" scheme before reverting to "Default" but that didn't work either. Any help appreciated, thank you! Edit: damn, I just found out that ctrl+x doesn't work any more either! 回答1: Got solved: Go to

问题 I was tried to detecting backspace inside of UITextfieldDelegate. And found this answer. https://stackoverflow.com/a/49294870/911528 And It working correctly. But I don't know what's going on inside of this function. let char = string.cString(using: String.Encoding.utf8)! let isBackSpace = strcmp(char, "\\b") if isBackSpace == -92 { print("Backspace was pressed") return false } I don't know why the result of cString of backspace is 0. I can debug on XCode. Please check the screenshot. I don't

问题 I was tried to detecting backspace inside of UITextfieldDelegate. And found this answer. https://stackoverflow.com/a/49294870/911528 And It working correctly. But I don't know what's going on inside of this function. let char = string.cString(using: String.Encoding.utf8)! let isBackSpace = strcmp(char, "\\b") if isBackSpace == -92 { print("Backspace was pressed") return false } I don't know why the result of cString of backspace is 0. I can debug on XCode. Please check the screenshot. I don't

问题 I didn't change any setting of my Vim, but today the Backspace gets some crazy behavior. Every time when I hit it, it does not delete a character, but prints ^? . Anyone knows what is going on? 回答1: Not sure why it would randomly start doing this based on the information you gave, but trying adding this line to your .vimrc set backspace=start,eol,indent 回答2: The problem comes from the communication between Mac Terminal the Linux Terminal. Go to the Mac Terminal -> Preferences -> Advanced tab,

问题 This question already has an answer here : python IDLE shell appears not to handle some escapes correctly (1 answer) Closed 2 years ago . I'm a high school student in Korea. While programming in python, I want to implement 'ghost typing', so I wrote this code on python IDLE. for i in range(5): print(i+1, end='') time.sleep(0.05) print('\b', end='') But it displayed: 12345 Image - This char() isn't displayed here. So I wonder, why python IDLE print '', and what I should do to print 'backspace'