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Converting between datetime, Timestamp and datetime64
...time.utcnow()
>>> dt
datetime.datetime(2012, 12, 4, 19, 51, 25, 362455)
>>> dt64 = np.datetime64(dt)
>>> ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
>>> ts
1354650685.3624549
>>> datetime.utcfromtimestamp(ts)
datetime.date...
In Java, what is the best way to determine the size of an object?
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edited Jun 28 '16 at 18:24
Ravindra babu
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a...
莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
... 239
第一部分 初始化、进程初始化
第5章 两个文件 241
5.1 文件malloc.c 241
5.1.1 列表维护规则 241
5.1.2 malloc(2528) 242
5.1.3 mfree(2556) 243
5.1.4 结论 244
5.2 文件prf.c 244
5.2.1 printf(2340) 244
5.2.2 printn(2369) 245
5.2.3 putchar(23...
SQL to determine minimum sequential days of access?
...tains one record for every day a given user has accessed a website (in a 24 hour UTC period). It has many thousands of records, but only one record per day per user. If the user has not accessed the website for that day, no record will be generated.
...
How to calculate the difference between two dates using PHP?
...s it's rather easy to calculate different time periods.
$date1 = "2007-03-24";
$date2 = "2009-06-26";
$diff = abs(strtotime($date2) - strtotime($date1));
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years * 365*6...
Calculate number of hours between 2 dates in PHP
...>diff($date1);
$hours = $diff->h;
$hours = $hours + ($diff->days*24);
echo $hours;
And here are the links for documentation:
DateTime-Class
DateTimeZone-Class
DateInterval-Class
DatePeriod-Class
All these classes also offer a procedural/functional way to operate with dates. Therefor...
Efficiently replace all accented characters in a string?
... var defaultDiacriticsRemovalMap = [
{'base':'A', 'letters':/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g},
{'base':'AA','lette...
Is the Javascript date object always one day off?
...ours and that the hours on the date you're getting back are 20.
20h + 4h = 24h
which is midnight of 2011-09-24. The date was parsed in UTC (GMT) because you provided a date-only string without any time zone indicator. If you had given a date/time string w/o an indicator instead (new Date("2011-09-2...
Pandas convert dataframe to array of tuples
...ta_2']]
tuples = [tuple(x) for x in subset.to_numpy()]
for pandas < 0.24 use
tuples = [tuple(x) for x in subset.values]
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parseInt(null, 24) === 23… wait, what?
... initialized and I stumbled upon this gem. The below happens for any radix 24 or above.
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