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How can i use iptables on centos 7? [closed]
...o there is no unintentional disruption of existing network connections" -- from the official firewalld docs
– yicone
Jul 20 '16 at 14:23
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What does ^M character mean in Vim?
...e empty string (i.e. nothing). I use this to get rid of ^M in files copied from Windows to Unix (Solaris, Linux, OSX).
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Xcode “Build and Archive” from command line
... in Xcode 4.4, and I'm sure it was fine in 4.3 as well. Make sure you have selected the correct Xcode release by using xcode-select <path to Xcode.app>
– Reid Ellis
Jul 30 '12 at 18:02
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How can I check MySQL engine type for a specific table?
...st of all the tables in a database and their engines, use this SQL query:
SELECT TABLE_NAME,
ENGINE
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = 'dbname';
Replace dbname with your database name.
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What is :: (double colon) in Python when subscripting sequences?
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TL;DR
This visual example will show you how to a neatly select elements in a NumPy Matrix (2 dimensional array) in a pretty entertaining way (I promise). Step 2 below illustrate the usage of that "double colons" :: in question.
(Caution: this is a NumPy array specific example with...
Making the main scrollbar always visible
... that slight but very noticeable and very annoying jerk as content changes from having scroll to not. With the disappearing scrollbars, they dont jerk the body when they show and hide so its ok for me. But thanks for this excellent point.
– Noitidart
Sep 17 '15...
When to use a View instead of a Table?
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Oh there are many differences you will need to consider
Views for selection:
Views provide abstraction over tables. You can add/remove fields easily in a view without modifying your underlying schema
Views can model complex joins easily.
Views can hide database-specific stuff from you. E....
Where to place the 'assets' folder in Android Studio?
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Select the app folder and then:
File > New > folder > assets Folder ,
the default location is inside /main folder
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Do threads have a distinct heap?
...Each thread has a private stack, which it can quickly add and remove items from. This makes stack based memory fast, but if you use too much stack memory, as occurs in infinite recursion, you will get a stack overflow.
Since all threads share the same heap, access to the allocator/deallocator mu...
Checking for an empty field with MySQL
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I have same comment as Quassnoi's. I issue "select orig_id,hotline from normal_1952 where !(hotline > '')" and there's one record with null hotline but it doesn't match.I'm using MySQL 5.6
– Scott Chu
Apr 15 '16 at 10:16
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