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Get domain name from given url
...ring.length() if there's no subsequent "/"). The remaining, preceding "www(_)*." bit is chopped off. I'm sure there'll be cases where this won't be good enough but it should be good enough in most cases!
Mike Samuel's post above says that the java.net.URI class could do this (and was preferred to t...
How to convert R Markdown to PDF?
...ying an output format to the rend function. E.g.,
render("input.Rmd", "pdf_document")
Command-line:
When I run render from the command-line (e.g., using a makefile), I sometimes have issues with pandoc not being found. Presumably, it is not on the search path.
The following answer explains how to...
WebDriver: check if an element exists? [duplicate]
... It seems the default implicit wait time is 0, (seleniumhq.org/docs/04_webdriver_advanced.html) So unless you've configured it to be longer, this shouldn't be necessary.
– Andrew M
May 24 '12 at 9:43
...
定时任务使用指导 · App Inventor 2 中文网
...打开「后台弹出界面」和「显示悬浮窗」）：
when 按钮_设闹钟.Click() {
if 定时任务1.HasLaunchPermission() {
定时任务1.ScheduleDaily(1, 7, 30)
对话框1.ShowAlert("已设好每天 7:30 的闹钟")
} else {
定时任务1.RequestLaunchPermission()
}
}
...
二进制组件使用指导 · App Inventor 2 中文网
...
电脑安装 Python 3 后，把下面代码保存为 check_binary.py，执行 python3 check_binary.py。不需要第三方库或连接设备；输出可与手机案例逐项对比。
import struct
import base64
# Modbus RTU 的 CRC16 校验按低字节在前追加，与数值字节...
How to ignore xargs commands if stdin input is empty?
... -L <#lines>, -n <#args>, -i, and -I <string>:
ls /empty_dir/ | xargs -n10 chown root # chown executed every 10 args or fewer
ls /empty_dir/ | xargs -L10 chown root # chown executed every 10 lines or fewer
ls /empty_dir/ | xargs -i cp {} {}.bak # every {} is replaced with the args...
How can I insert values into a table, using a subquery with more than one result?
...
INSERT INTO iden_course (Cse_M_ID,Cse_M_Name,Cse_M_ShName, Cse_M_TotSem,Cse_M_CreatedDate) VALUES ('ID','BJf', 'BJfg' , '4',Now()) select max(Cse_M_ID) as ID from iden_course how to add in this query
– SANDEEP
...
How can I automatically deploy my app after a git push ( GitHub and node.js)?
...ervice Hooks' => 'WebHook URLs'
and add
http://your-domain-name/git_test.php
then create git_test.php
<?php
try
{
$payload = json_decode($_REQUEST['payload']);
}
catch(Exception $e)
{
exit(0);
}
//log the request
file_put_contents('logs/github.txt', print_r($payload, TRUE), FILE...
Change the URL in the browser without loading the new page using JavaScript
...t type="text/javascript">
var stateObj = { foo: "bar" };
function change_my_url()
{
history.pushState(stateObj, "page 2", "bar.html");
}
var link = document.getElementById('click');
link.addEventListener('click', change_my_url, false);
</script>
and a href:
<a href="#" id='click'&g...
Is there a way to create multiline comments in Python?
... they appear in the source code.
If you try to run this code...
def parse_token(token):
"""
This function parses a token.
TODO: write a decent docstring :-)
"""
if token == '\\and':
do_something()
elif token == '\\or':
do_something_else()
elif token =...