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Converting Long to Date in Java returns 1970
...put of seconds, and multiply by a thousand. Note that the result must be a 64-bit long as we would overflow a 32-bit int.
long input = 1_220_227_200L; // Note the "L" appended to long integer literals.
long milliseconds = ( input * 1_000L ); // Use a "long", not the usual "int". Note the appended "...
How do you use vim's quickfix feature?
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64
The easiest way to navigate the quickfix list (or the location list, for that matter) is the un...
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
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Mike BrantMike Brant
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Using regular expressions to parse HTML: why not?
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Hank GayHank Gay
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Where is the itoa function in Linux?
...nguage ("K&R2") contains the following implementation of itoa, on page 64. The book notes several issues with this implementation, including the fact that it does not correctly handle the most negative number
/* itoa: convert n to characters in s */
void itoa(int n, char s[])
{
int i...
How do I convert a float number to a whole number in JavaScript?
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bradbrad
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How can I add the new “Floating Action Button” between two widgets/layouts
... from shamanland implementation, use whatever FAB you wish. Assume FAB is 64dp high including shadow:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="ma...
What's the Android ADB shell “dumpsys” tool and what are its benefits?
...ing CPU info
~$ adb shell dumpsys cpuinfo
Output:
Load: 0.08 / 0.4 / 0.64
CPU usage from 42816ms to 34683ms ago:
system_server: 1% = 1% user + 0% kernel / faults: 16 minor
kdebuglog.sh: 0% = 0% user + 0% kernel / faults: 160 minor
tiwlan_wq: 0% = 0% user + 0% kernel
usb_mass_storag: 0% = 0% user...
How to store a dataframe using Pandas
... data needs to be transformed after loading (i.e. string/object to datetime64) this would need to be done again after loading a saved csv, resulting in performance loss. pickle saves the dataframe in it's current state thus the data and its format is preserved. This can lead to massive performance i...
Debug vs. Release performance
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64
There is no article which "proves" anything about a performance question. The way to prove an a...