As I had promised, I will start blogging a couple more code snippets, so (basically) I can look them up and don’t forget how to do small things. If you find them useful, I am glad, if not it’s a good lookup resource (for me).
So this time, I have three code snippets.
That is definitely not the solution I really like, but that’s the one I have decided on (just because I don’t remember the cool one I had created some time ago, and I can’t find it).
1 2 3 4 | >>> // Create a string "12345678910" by just giving the endpoint. >>> var endPoint = 10; >>> for(var i=0, arr=[];i < endPoint;i++, arr.push(i)){}; arr.join("") "12345678910" |
[Update]
Doh, thx to Sebastian this is actually really easy :)
1 2 | >>> "abc".slice(0, -1); "ab" |
[/Update]
Actually this one works (could work) for any number of character, that you want to chop off the end of a string. After throwing ideas forth and back on twitter, this one was the outcome.
1 2 3 4 | >>> // Cut off the last character, to make "abc" into "ab" >>> initialString = "abc" >>> [].slice.apply(initialString, [0,-1]).join("") "ab" |
I like this approach.
Thanks to John I learned after a couple (more complex) approaches that converting decimal numbers into hexadecimals is as easy as:
1 2 3 4 5 | >>> Number(11).toString(16) "b" >>> // Or to make it a "real" hex number :) >>> "0x0" + Number(11).toString(16).toUpperCase() "0x0B" |
If you wonder now how to convert back, from a hex number to a decimal, try this on your JavaScript console.
1 2 3 4 5 | >>> 0x0B 11 >>> // If you get the "B" as a string, just do: >>> parseInt("0x0B") 11 |
Easy, ha!?
Have fun snippeting around, I hope some was helpful.
Comments
This is quicker and is less code for the string of sequenced numbers.
var i = 0, max = 10, o = ”;
while (i < max) {
o += ++i;
}
http://jsperf.com/sequential-numbers
August 19, 2011 — 11:13 pm
Tim Wood
Thank you Tim!
January 19, 2012 — 08:36 am
Wolfram Kriesing