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Command line for looking at specific port
...080"
In bash:
netstat -na | grep "8080"
In PowerShell:
netstat -na | Select-String "8080"
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App Inventor 2 拖拽物体教程 - 按住移动与碰撞检测 · App Inventor 2 中文网
...
when 画布1.TouchUp(x, y) {
正在拖拽 = false
var 目标位置X = select(目标X, 当前拖拽索引)
var 目标位置Y = select(目标Y, 当前拖拽索引)
var 距离 = sqrt((x - 目标位置X) ^ 2 + (y - 目标位置Y) ^ 2)
if 距离 < 吸附距离 {
图像精灵1.X = 目标位...
Getting the SQL from a Django QuerySet [duplicate]
...t;> queryset = MyModel.objects.all()
>>> print(queryset.query)
SELECT "myapp_mymodel"."id", ... FROM "myapp_mymodel"
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Conditional Replace Pandas
...e,
df.loc[df.my_channel > 20000, 'my_channel'] = 0
mask helps you to select the rows in which df.my_channel > 20000 is True, while df.loc[mask, column_name] = 0 sets the value 0 to the selected rows where maskholds in the column which name is column_name.
Update:
In this case, you should u...
PostgreSQL: How to change PostgreSQL user password?
...is an object, not a string. Compare with ALTER TABLE "table_name" or even SELECT * FROM "table_name". You couldn't use single quotes in these contexts with tables, and it's the same with users/roles.
– P Daddy
Apr 13 '16 at 5:11
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How do I delete specific lines in Notepad++?
...ature of Notepad++ that I use to update my code.
All you need to do is:
Select common string that is present in all lines.
Press Ctrl + F
In the Mark tab, paste the recurring string and check the Bookmark line checkbox.
Click on Mark All
Now go to menu Search → Bookmark → Remove Bookmarked Li...
The definitive guide to form-based website authentication [closed]
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A cryptographic hash should not be used for password storage because user-selected passwords are not strong enough (i.e. do not usually contain enough entropy) and a password guessing attack could be completed in a relatively short time by an attacker with access to the hashes. This is why KDFs are...
Apache2: 'AH01630: client denied by server configuration'
...activity)
In activity monitor search for httpd which is the Apache service
Select the one that belongs to root and click X on the top left to close it.
At that point I immediately stopped getting 403 errors and everything started working as expected. Weird thing is i didn't even have to restart ap...
Drawing an image from a data URL to a canvas
...
in javascript , using jquery for canvas id selection :
var Canvas2 = $("#canvas2")[0];
var Context2 = Canvas2.getContext("2d");
var image = new Image();
image.src = "images/eye.jpg";
Context2.drawImage(image, 0, 0);
html5:
<canv...
How can I create a unique constraint on my column (SQL Server 2008 R2)?
...the "General" tab.
Make sure you have the column you want to make unique selected in the "columns" box.
Change the "Type" box to "Unique Key".
Click "Close".
You see a little asterisk in the file window, this means changes are not yet saved.
Press Save or hit Ctrl+s. It should save, and your colu...