clear

Clearing output of a terminal program in Linux C

由 倾然丶 夕夏残阳落幕 提交于 2019-12-03 14:12:41
问题 I want to clear the output of a C program produced with printf statements. I want to clear only one line, for example: [source] printf("AAAAAAAAAAAAAA\n"); printf("BBBBBBBBBBBBBB\n"); printf("CCCCCCCCCCCCCC\n"); printf("DDDDDDDDDDDDDD\n"); [terminal] AAAAAAAAAAAAAA BBBBBBBBBBBBBB CCCCCCCCCCCCCC DDDDDDDDDDDDDD [I hope] AAAAAAAAAAAAAA BBBBBBBBBBBBBB CCCCCCCCCCCCCC I will "DDDDDDDDDDDDDD" line in write other string. I just want the above A, B, C sentences to left. Only clear D sentences to

How can I dynamically clear all controls in a user control?

由 核能气质少年 提交于 2019-12-03 14:11:49
Is it possible to dynamically (and generically) clear the state of all of a user control's child controls? (e.g., all of its TextBoxes, DropDrownLists, RadioButtons, DataGrids, Repeaters, etc -- basically anything that has ViewState) I'm trying to avoid doing something like this: foreach (Control c in myUserControl.Controls) { if (c is TextBox) { TextBox tb = (TextBox)c; tb.Text = ""; } else if (c is DropDownList) { DropDownList ddl = (DropDownList)c; ddl.SelectedIndex = -1; } else if (c is DataGrid) { DataGrid dg = (DataGrid)c; dg.Controls.Clear(); } // etc. } I'm looking for something like

Does MATLAB keep some variables after clearing?

由 对着背影说爱祢 提交于 2019-12-03 13:22:38
I have a program that reads in a really large Excel file and creates some large variables. This runs out of storage if I try to run it multiple times in a row, which makes sense, i.e.: large_program; large_program will crash. However, what I don't understand is why large_program; clear all; large_program will also crash; in order to run it multiple times, I have to restart MATLAB each time. Does MATLAB not actually clear all variables? Or is this a fragmentation of memory thing? Matlab can indeed hold onto some variables and other settings "under the hood". I have the following set up as a

Stop AnimatorSet of ObjectAnimators in Android

由 允我心安 提交于 2019-12-03 09:38:20
问题 Im trying to stop the animation of an ImageView when a button is clicked. The animation I am using is an AnimatorSet consisting of 5 ObjectAnimators ... The problem is that I can't figure how to stop and clear this animation from the ImageView when the button is clicked as btn.clearAnimation() obviously doesn't work. Thank you for your help. 回答1: You should be able to call animatorSet.cancel() to cancel the animation. Here's an example that cancels the animation 5 seconds after it starts:

how to clear the last <li> tag within a <ul>

由 筅森魡賤 提交于 2019-12-03 08:19:37
问题 I know this is pretty basic, but it is giving me hangups. I have a basic list: <ul> <li><a href="#">Insert Link Here</a></li> <li><a href="#">Insert Link Here</a></li> <li><a href="#">Insert Link Here</a></li> </ul> What do I need to do to make sure the last <li> item gets cleared? I've tried adding style="clear:both" to the end with no avail. Also I've added a 'div' after the last <li> tag before the closing </ul> tag, that works, but I know it doesn't validate. 回答1: If you want to have the

Memcache invalidate entries according to a pattern?

由 拟墨画扇 提交于 2019-12-03 07:08:04
问题 Is there a way to invalidate entries in memcache according to a wildcard key? So if I have the following memcache keys: data/1 data/2 data/3 Is there a way I can invalidate those keys with something like data/* ? It would be extremely helpful to clear out a bunch of stale data in one swoop. 回答1: The best way is to provide a versioning key when creating your memcache key. We do this by providing a single function/method for creating a key on our system. $var1 = 123; $var2 = 456; $cacheKey =

定位方法

由 早过忘川 提交于 2019-12-03 06:38:36
8种定位方式,例子使用不同的方法定位百度输入框； 定位组元素在element后加s，find_elements_by_**,其余不变，可以定位出多个元素，根据具体情看用法 1 #coding = utf-8 2 3 from selenium import webdriver 4 import time 5 6 driver = webdriver.Chrome() 7 driver.get('http://www.baidu.com') 8 #使用不同方法定位输入框 9 driver.find_element_by_id('kw').send_keys('第一次') 10 time.sleep(2) 11 driver.find_element_by_id('kw').clear() 12 time.sleep(2) 13 driver.find_element_by_name('wd').send_keys('第二次') 14 time.sleep(2) 15 driver.find_element_by_name('wd').clear() 16 time.sleep(2) 17 driver.find_element_by_class_name('s_ipt').send_keys('第三次') 18 time.sleep(2) 19 driver.find_element

Is JavaScript's array.clear() not a function? [duplicate]

由 牧云@^-^@ 提交于 2019-12-03 06:28:01
问题 This question already has answers here : How do I empty an array in JavaScript? (18 answers) Closed 5 years ago . I'm trying to empty an array containing my drawn coordinates when a button "clear" is pressed. When I call drawnDivs.clear() , I get an error that it is not a function. drawnDivs is certainly an array, and I have Firebug console.log s printing things out. It's hosted here. 回答1: Nope, it's not. But drawnDivs.length = 0 should work. 回答2: drawnDivs = []; 回答3: It was answered in Stack

Disable dropdown opening on select2 clear

由 我是研究僧i 提交于 2019-12-03 05:25:11
Seems that select2 4 opens by default the dropdown when clearing the current selected item. Previous versions of select2 didn't seem to have that behaviour and I'm trying to achieve it but no luck for now. Does anyone know how to hook into the clear event so we can disable it's default behaviour and clear the selected option without opening the dropdown? Cheers, Al Can confirm, preventing events seems to not work for some reason, so you can just close the dropdown after some timeout: $("select").select2({ allowClear: true }).on("select2:unselecting", function(e) { $(this).data('state',

Python : clear a log file

由 空扰寡人 提交于 2019-12-03 05:19:08
I develop a client-server application and I have log in the server, so I use the logging module. I would like to create a command in the server to clear the file. I have test with os.remove() but after, the log doesn't work. Do you have an idea? Thanks. It might be better to truncate the file instead of removing it. The easiest solution is to reopen the file for writing from your clearing function and close it: with open('yourlog.log', 'w'): pass 来源： https://stackoverflow.com/questions/8898997/python-clear-a-log-file
订阅 clear