大约有 19,000 项符合查询结果（耗时：0.0387秒） [XML]
MySQL, Check if a column exists in a table with SQL
...s, 'jos_vm_product', 'child_option', NULL) //
Query OK, 0 rows affected (0.01 sec)
mysql> select @_exists //
+----------+
| @_exists |
+----------+
| 0 |
+----------+
1 row in set (0.00 sec)
mysql> call fieldExists(@_exists, 'jos_vm_product', 'child_options', 'etrophies') //
Query OK,...
Responsive image map
...stion....
– Malachi
Apr 8 '14 at 14:01
@Tom this works only for one image..if we place another image then its not work...
WebSockets protocol vs HTTP
...on handshakes, but with a WebSocket connection the initial handshake is performed once and then small messages only have 6 bytes of overhead (2 for the header and 4 for the mask value). The latency overhead is not so much from the size of the headers, but from the logic to parse/handle/store those h...
How to force file download with PHP
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Pit DiggerPit Digger
8,6012222 gold badges6868 silver badges118118 bronze badges
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Having a UITextField in a UITableViewCell
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edited May 27 '15 at 0:01
pkamb
24.6k1818 gold badges116116 silver badges145145 bronze badges
answere...
ISO time (ISO 8601) in Python
...ould like to take its creation time, and convert it to an ISO time (ISO 8601) string while preserving the fact that it was created in the Eastern Time Zone (ET) .
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How to overcome “datetime.datetime not JSON serializable”?
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Updated for 2018
The original answer accommodated the way MongoDB "date" fields were represented as:
{"$date": 1506816000000}
If you want a generic Python solution for serializing datetime to json, check out @jjmontes' answer for a qui...
How do I create a simple 'Hello World' module in Magento?
...er possible, try to use the model objects the system provides to get the information you need. I know it's all there in the SQL tables, but it's best not to think of grabbing data using raw SQL queries, or you'll go mad.
Final disclaimer. I've been using Magento for about two or three weeks, so cav...
Best Practice: Software Versioning [closed]
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answered May 19 '10 at 10:01
Mahesh VelagaMahesh Velaga
19.1k55 gold badges3333 silver badges5757 bronze badges
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Scatterplot with too many points
...- ggplot(df, aes(x, y)) +
geom_point(alpha = 0.1) +
geom_rug(alpha = 0.01)
Combine in one figure:
cowplot::plot_grid(
o1, o2, o3, o4, o5, o6,
ncol = 2, labels = 'AUTO', align = 'v', axis = 'lr'
)
share
...