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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...om a character field representation to a date you can use:
select date(substring('2011/05/26 09:00:00' from 1 for 10));
Test code:
create table test_table (timestamp_field timestamp);
insert into test_table (timestamp_field) values(current_timestamp);
select timestamp_field, date(timestamp_field...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
... 9 up to 16 bit columns, the columns are stored as 2 bytes, and so on.
The string values TRUE and FALSE can be converted to bit values: TRUE is converted to 1 and FALSE is converted to 0.
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Wait until a process ends
...itForExit(1000 * 60 * 5); // Wait up to five minutes.
There are a few extra features in there which you might find useful...
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Is there a standardized method to swap two variables in Python?
... As far as I understand, swapping two variables in this way does NOT use extra memory, just memory for 2 variables themselves, am I right ?
– Catbuilts
May 11 '19 at 13:25
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Disabling Chrome cache for website development
...ev Tools option doesn't seem to work for me. But cache killer works like a charm. The reload time is significantly slower, like 4-5x, but the actual serving up of the new content is obviously much quicker.
– Bryce Johnson
Jan 24 '14 at 18:01
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Convert String to Calendar Object in Java
... DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" )
)
).toString()
2011-03
Avoid legacy date-time classes
The modern way is with java.time classes. The old date-time classes such as Calendar have proven to be poorly-designed, confusing, and troublesome.
Define a custom form...
Is it better to use C void arguments “void foo(void)” or not “void foo()”? [duplicate]
...nverted to promoted types (that is called the default argument promotion). char will become int, for example, while float will become double.
Composite type for functions
By the way, if a file contains both an omitted identifier list and a parameter type list, the parameter type list "wins". The ...
使用Activity启动器组件 · App Inventor 2 中文网
...性 DataType 和 DataURI 在 App Inventor 中设置这些。 还有一个 Extras 属性，它采用键和值的列表并指定相应键的属性值。 你必须设置的特定值取决于你要启动的活动。
这里有些例子。
警告：这些示例中的值取决于应用程序用户设备...
Javascript parseInt() with leading zeros
...cond argument:
parseInt("08", 10);
Earlier versions of JavaScript treat strings starting with 0 as octal (when no base is specified) and neither 08 nor 09 are valid octal numbers.
From the Mozilla documentation:
If radix is undefined or 0, JavaScript assumes the following:
If the in...
Using 'starts with' selector on individual class names
.... It would be marginally faster (at best) because it would not have to substring the class attribute. Negligible.
– Josh Stodola
Feb 1 '10 at 16:58
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