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get list from pandas dataframe column
...List from one Panda Column
Numpy Array
data = np.array([[10,20,30], [20,30,60], [30,60,90]])
Convert numpy array into Panda data frame
dataPd = pd.DataFrame(data = data)
print(dataPd)
0 1 2
0 10 20 30
1 20 30 60
2 30 60 90
Convert one Panda column to list
pdToList = list(dataPd['...
Finding the number of days between two dates
...ime("2010-01-31");
$datediff = $now - $your_date;
echo round($datediff / (60 * 60 * 24));
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How do I get the current time only in JavaScript
...4 hours later (use milisec: sec==1000):
new Date(new Date().getTime() + 4*60*60*1000).toLocaleTimeString(); // 3:18:48 PM or 15:18:48
2 days before:
new Date(new Date().getTime() - 2*24*60*60*1000).toLocaleDateString() // 11/14/2015
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Why is 1/1/1970 the “epoch time”?
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Early versions of unix measured system time in 1/60 s intervals. This meant that a 32-bit unsigned integer could only represent a span of time less than 829 days. For this reason, the time represented by the number 0 (called the epoch) had to be set in the very recent past....
Is Random class thread safe?
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Up! Q: is (24*60*60*1000) part significant?
– Jin Kwon
Oct 24 '12 at 4:49
1
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How can I parse a local JSON file from assets folder into a ListView?
...loper",
"leaveBalance": "3",
"pfBalance": "60,000",
"pfAccountNo.": "12345678"
},
{
"empId": "2",
"empName": "Ram",
"empFatherName": "Mr Dasrath ji",
"empSalary": "...
presentViewController:animated:YES view will not appear until user taps again
...is what I have now: Tap 1 Correct Guess: 1 kHz 18:04:57.173 Frequency[641:60b] [HFBCorrectViewController initWithNibName:bundle:] 18:04:57.177 Frequency[641:60b] [HFBCorrectViewController viewDidLoad] Now nothing happens until:Tap 2 18:05:00.515 Frequency[641:60b] [HFBCorrectViewController viewDid...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
... Pentium III 500 MHz 的CPU和 128 MB 内存的电脑上，RTD可以在一秒内对20000个独立的主题（topic）更新三次，对于单独一个主题的更新频率可达1秒200次。
使用场景
RTD函数很有用，如果您遇到以下情况，那么您应当考虑使用RTD函数了...
How do I lowercase a string in C?
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to convert to lower case is equivalent to rise bit 0x60 if you restrict yourself to ASCII:
for(char *p = pstr; *p; ++p)
*p = *p > 0x40 && *p < 0x5b ? *p | 0x60 : *p;
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Moment.js - how do I get the number of years since a date, not rounded up?
... now = moment().unix();
var then = date.unix();
var diff = (now - then) / (60 * 60 * 24 * 365);
var years = Math.floor(diff);
Edit: First version didn't quite work perfectly. The updated one should
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