大约有 3,000 项符合查询结果（耗时：0.0195秒） [XML]
How to test an Internet connection with bash?
...l OK" code
Without wget
#!/bin/bash
echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1
if [ $? -eq 0 ]; then
echo "Online"
else
echo "Offline"
fi
share
|
...
How do I execute a program from Python? os.system fails due to spaces in path
...
At least in Windows 7 and Python 3.1, os.system in Windows wants the command line double-quoted if there are spaces in path to the command. For example:
TheCommand = '\"\"C:\\Temp\\a b c\\Notepad.exe\"\"'
os.system(TheCommand)
A real-world example tha...
Reusable library to get human readable version of file size?
...Ti','Pi','Ei','Zi']:
if abs(num) < 1024.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
Supports:
all currently known binary prefixes
negative and positive numbers
numbers larger than 1000 Yobibytes
arbitrary un...
Recursively counting files in a Linux directory
.../1.33 seconds (real/user/sys). rsync --stats --dry-run -ax ~ /xxx took 4.4/3.1/2.1 seconds. That's for about 500,000 files on SSD.
– slim
Animate text change in UILabel
...ce iOS4 it can be obviously done with blocks:
[UIView animateWithDuration:1.0
animations:^{
label.alpha = 0.0f;
label.text = newText;
label.alpha = 1.0f;
}];
...
UITableViewCell subview disappears when cell is selected
...ighted){
self.yourView.backgroundColor = color;
}
}
In Swift 3.1 :
override func setSelected(_ selected: Bool, animated: Bool) {
let color = yourView.backgroundColor
super.setSelected(selected, animated: animated)
if selected {
yourView.backgroundColor = ...
WebView and HTML5
...Group.LayoutParams.MATCH_PARENT);
}
custom_screen.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2009 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License....
To draw an Underline below the TextView in Android
...line using setPaintFlags()");
using SpannableString
`String content1 = "3.1 Underline using SpannableString";
SpannableString spannableString1 = new SpannableString(content1);
spannableString1.setSpan(new UnderlineSpan(), 0, content1.length(), 0);
textview31.setText(spanna...
Ignoring accented letters in string comparison
... more simple way to remove accents:
Dim source As String = "áéíóúç"
Dim result As String
Dim bytes As Byte() = Encoding.GetEncoding("Cyrillic").GetBytes(source)
result = Encoding.ASCII.GetString(bytes)
...
View's SELECT contains a subquery in the FROM clause
...
Now allowed in 5.7 ! :-)
– François Breton
Feb 18 '16 at 14:26
4
Not allow...