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How many GCC optimization levels are there?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...
@kerenk, Now that's odd. Did you try it in psql?
– Wayne Conrad
May 26 '11 at 3:33
40
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Send email using java
...ord GMail password
* @param recipientEmail TO recipient
* @param ccEmail CC recipient. Can be empty if there is no CC recipient
* @param title title of the message
* @param message message to be sent
* @throws AddressException if the email address parse failed
* @throws...
In C++, what is a virtual base class?
...I found that solved all my doubts on this subject was this article: http://www.phpcompiler.org/articles/virtualinheritance.html
You really won't need to read anything else on the topic (unless you are a compiler writer) after reading that...
...
How does a debugger work?
...ations for Microsoft .NET and Microsoft Windows" by John Robbins:
http://www.amazon.com/dp/0735615365
(or even the older edition: "Debugging Applications")
The book has has a chapter on how a debugger works that includes code for a couple of simple (but working) debuggers.
Since I'm not fami...
第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...断显示ASCII字母，AH,BX指定显示模式及参数(详见：https://www.tsingfun.com/it/cpp/int_10h_instructions.html)
MOV BX, 15
INT 0x10
JMP _LOOP ;继续下一个字符的显示
_END:
JMP $ ;跳到当前的地址，当然就陷入无限循环啦，此处为了让程序停...
Loop through a date range with JavaScript
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Here's a way to do it by making use of the way adding one day causes the date to roll over to the next month if necessary, and without messing around with milliseconds. Daylight savings aren't an issue either.
var now = new Date();
var daysOfYear = [];
for (var d = new Da...
Format Instant to String
...ate-time fields, and therefore throws an exception.
The time-zone can be added directly to the formatter using withZone().
DateTimeFormatter formatter =
DateTimeFormatter.ofLocalizedDateTime( FormatStyle.SHORT )
.withLocale( Locale.UK )
.withZone( Zone...
Nested defaultdict of defaultdict
...
For an arbitrary number of levels:
def rec_dd():
return defaultdict(rec_dd)
>>> x = rec_dd()
>>> x['a']['b']['c']['d']
defaultdict(<function rec_dd at 0x7f0dcef81500>, {})
>>> print json.dumps(x)
{"a": {"b": {"c": {"d": {}}}}}
O...