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What's the difference between `1L` and `1`?
...hat's less wasted memory and less to wade through for the CPU (so it's typically faster).
Mostly this applies when working with indices.
Here's an example where adding 1 to an integer vector turns it into a double vector:
x <- 1:100
typeof(x) # integer
y <- x+1
typeof(y) # double, twice the...
curl_exec() always returns false
...OST, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
before the call to curl_exec($ch).
Because i am working between two development environments with self-assigned certificates.
With valid certificates there is no need to set VERIFYHOST and VERIFYPEER to false because the curl_exec($ch)...
What's the difference between nohup and ampersand
...h &
Nohup catches the HUP signals.
Nohup doesn't put the job automatically in the background. We need to tell that explicitly using &
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Use gulp to select and move directories and their files
I'm currently using gulp to call a bash script that cleans my dist/ directory and moves the appropriate files to the clean directory. I would like this to be done with gulp because I am not sure the script would work on a non *nix file system.
So far, I'm using the gulp-clean module to clean the...
nodeValue vs innerHTML and textContent. How to choose?
... text, does not parse HTML, and is faster.
innerText Takes styles into consideration. It won't get hidden text for instance.
innerText didn't exist in firefox until FireFox 45 according to caniuse but is now supported in all major browsers.
...
Maven2 property that indicates the parent directory
...to the root module...
In my project root pom:
<plugin>
<groupId>org.commonjava.maven.plugins</groupId>
<artifactId>directory-maven-plugin</artifactId>
<version>0.1</version>
<executions>
<execution>
<id>...
recursively add file extension to all files
...
I know at least of two different commands called rename, one a C program included in util-linux-ng and one a Perl program (by Wall himself) on our university's Debian machines. Actually, none of both do recursion.
– Boldewyn
Jul...
How can I use mySQL replace() to replace strings in multiple records?
...(StringColumn, 'GREATERTHAN', '>')
You can also nest multiple REPLACE calls
UPDATE MyTable
SET StringColumn = REPLACE (REPLACE (StringColumn, 'GREATERTHAN', '>'), 'LESSTHAN', '<')
You can also do this when you select the data (as opposed to when you save it).
So instead of :
SELECT M...
Get distance between two points in canvas
..., y2)
then you can calculate the difference in x and difference in y, lets call them a and b.
var a = x1 - x2;
var b = y1 - y2;
var c = Math.sqrt( a*a + b*b );
// c is the distance
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How to randomly sort (scramble) an array in Ruby?
...Just wanted to add: if you want to affect the collection add a ! after the call to shuffle. Without the ! the shuffled array is returned, and ripe for a assignment.
– Muyiwa Olu
Jul 17 '16 at 16:13
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