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How to get the first element of an array?
...rtant thing to know is that the two above are only an option if your array starts with a [0] index.
There are cases where the first element has been deleted, example with, delete yourArray[0] leaving your array with "holes". Now the element at [0] is simply undefined, but you want to get the first ...
How do you search an amazon s3 bucket?
... crazy simple:
open the bucket, select "none" on the right hand side, and start typing in the file name.
http://docs.aws.amazon.com/AmazonS3/latest/UG/ListingObjectsinaBucket.html
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Restoring MySQL database from physical files
...c location, then I copy those to corresponding location, exactly.
Step 7: Start your Mysql server. Everything come back and enjoy it.
That is it.
See more info at: https://biolinh.wordpress.com/2017/04/01/restoring-mysql-database-from-physical-files-debianubuntu/
...
Best way to extract a subvector from a vector?
...ays, we use spans! So you would write:
#include <gsl/span>
...
auto start_pos = 100000;
auto length = 1000;
auto span_of_myvec = gsl::make_span(myvec);
auto my_subspan = span_of_myvec.subspan(start_pos, length);
to get a span of 1000 elements of the same type as myvec's. Or a more terse form...
How to set Java environment path in Ubuntu
...e and then do the following:
Assuming you are using bash (if you are just starting off, i recommend bash over other shells) you can simply type in bash to start it.
Edit your ~/.bashrc file and add the paths as follows:
for eg. vi ~/.bashrc
insert following lines:
export JAVA_HOME=/usr/java/<...
WebRTC vs Websockets: If WebRTC can do Video, Audio, and Data, why do I need Websockets? [closed]
... signaling.
I maintain a list of WebRTC resources: strongly recommend you start by looking at the 2013 Google I/O presentation about WebRTC.
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What's the easiest way to install a missing Perl module?
...
On Unix:
usually you start cpan in your shell:
# cpan
and type
install Chocolate::Belgian
or in short form:
cpan Chocolate::Belgian
On Windows:
If you're using ActivePerl on Windows, the PPM (Perl Package Manager) has much of the same f...
Declaring variables inside or outside of a loop
... public static void main(String[] args) throws Exception {
long start = System.currentTimeMillis();
double test;
for (double i = 0; i < 1000000000; i++) {
test = i;
}
long finish = System.currentTimeMillis();
System.out.println("Test1...
Cannot refer to a non-final variable inside an inner class defined in a different method
...ence where the String object "hello" lives in heap
}
}.start();
// change the reference 'shared' points to, with a new value
shared = "other hello";
System.out.println(shared);
}
}
That won't work, because this is what the compiler does under the h...
How to get a path to a resource in a Java JAR file
...JAR, especially if a JAR (or any program, for that matter) is run from the Start Menu under Windows. So here is what I did, and it works for .class files run from outside a JAR just as well as it works for a JAR. (I only tested it under Windows 7.)
try {
//Attempt to get the path of the actual ...