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After Installing Java JDK 7 For Mac OS X - mvn -version still shows java version 1.6.0_31
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In case anyone is installing Maven on a 64-bit Mac running Mac OSX 'Mavericks' save yourself some time and some hair pulling trying to get Maven installed. I was trying to follow this (which failed because the location of the java_home has changed on Mavericks:
http:...
Should I use the datetime or timestamp data type in MySQL?
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Of course, use 64-bit Unix timestamps. For example, in Java, new Date().getTime() already gives you a 64-bit value.
– Sergey Orshanskiy
Oct 8 '13 at 1:16
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Get Unix Epoch Time in Swift
...000) // most likely precise
Unfortunately, however, in the year 2038, 32-bit numbers won't be usable for the Unix timestamp and they'll have to be 64-bit.
let seconds = Date().timeIntervalSince1970
let milliseconds = Date().timeIntervalSince1970 * 1_000
let microseconds = Date().timeIntervalSince...
How to check command line parameter in “.bat” file?
My OS is Windows Vista. I need to have a ".bat" file where I need to check if user enters any command-line parameter or not. If does then if the parameter equals to -b then I will do something otherwise I will flag "Invalid input". If user does not enter any command-line parameter then I will d...
What is a bus error?
...start
_start:
asm_main_after_prologue:
/* misalign the stack out of 16-bit boundary */
add sp, sp, #-4
/* access the stack */
ldr w0, [sp]
/* exit syscall in case SIGBUS does not happen */
mov x0, 0
mov x8, 93
svc 0
That program then raises SIGBUS on Ubuntu 18.04 a...
Pandas - Get first row value of a given column
...pies the data into a new Series of object dtype. So
selecting columns is a bit faster than selecting rows. Thus, although
df_test.iloc[0]['Btime'] works, df_test['Btime'].iloc[0] is a little bit
more efficient.
There is a big difference between the two when it comes to assignment.
df_test['Btime']....
Why do I need 'b' to encode a string with Base64?
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base64 encoding takes 8-bit binary byte data and encodes it uses only the characters A-Z, a-z, 0-9, +, /* so it can be transmitted over channels that do not preserve all 8-bits of data, such as email.
Hence, it wants a string of 8-bit bytes. You cr...
“/usr/bin/ld: cannot find -lz”
...1g-dev did not fix it. Installing lib32z1-dev got me past it. I have a 64 bit system and it seems like it wanted the 32 bit library.
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Generating Guids in Ruby
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To save you a bit of lookup, you'll need to require 'securerandom'
– Jesse Shieh
Dec 12 '12 at 18:41
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What is the difference between String and string in C#?
...framework designers have followed this pattern, good examples being in the BitConverter, BinaryReader and Convert classes.
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