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CSS Properties: Display vs. Visibility
...lement (i.e. it has height and width properties that you can set, it's floatable, etc), or an inline-block (i.e. it acts like a block box but is laid inline instead) and some others (list-item, table, table-row, table-cell, flex, etc).
When you set an element to display: block but also set visibili...
How to make a transparent UIWebView
I have an app with a UITableView and a corresponding detail view for each row. In the detail view I have to display some text and a background image (text is different for each row, but the image remains the same). The easiest way, in my opinion, is to put the text in an .rtf file and display it i...
Using current time in UTC as default value in PostgreSQL
...ded. Just put parentheses around the default expression:
create temporary table test(
id int,
ts timestamp without time zone default (now() at time zone 'utc')
);
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Is it safe to push_back an element from the same vector?
...
@MatthieuM. No: Table 100 says: "pre: i and j are not iterators into a".
– Sebastian Redl
Sep 13 '13 at 14:34
2
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Supabase扩展能实现实时推送吗？源码级Realtime能力分析 - App应用开发 - ...
...NSERT/UPDATE/DELETE 操作，实时获取变更数据。支持按 schema、table、event、filter 精确过滤。
关键：三种功能都依赖 WebSocket 长连接（基于 Phoenix Channels 协议），不是 HTTP 请求-响应模式。
二、当前 Supabase 扩展源码分析
扩展包...
CSS to stop text wrapping under image
...:
float: left / right
overflow: hidden / auto / scroll
display: table-cell and any table-related values / inline-block
position: absolute / fixed
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What does “static” mean in C?
...If we compile:
int i = 0;
static int si = 0;
and disassemble the symbol table with:
readelf -s main.o
the output contains:
Num: Value Size Type Bind Vis Ndx Name
5: 0000000000000004 4 OBJECT LOCAL DEFAULT 4 si
10: 0000000000000000 4 OBJECT GLOBAL DEFAULT...
Hibernate: hbm2ddl.auto=update in production?
...ddl hardly can predict (such as disabling triggers that were installed for table being modified). For complex schemas the safest way is manual. Automatic with post-regression testing is distant second. All IMHO.
– Vladimir Dyuzhev
Oct 21 '08 at 14:06
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How does Django's Meta class work?
...odel. It defines such things as available permissions, associated database table name, whether the model is abstract or not, singular and plural versions of the name etc.
Short explanation is here: Django docs: Models: Meta options
List of available meta options is here: Django docs: Model Meta op...
Java: parse int value from a char
...ou take '2' - '0' you really just get 50 - 48 = 2. Have a look at an ASCII table in order to understand this principle better. Also, 'x' means get the ascii value of the character in Java.
– Kevin Van Ryckegem
May 13 '17 at 13:16
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