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Split a vector into chunks in R
... number of chunks of size n. I had the same problem and used the solutions from @mathheadinclouds.
– rrs
Apr 21 '14 at 18:26
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What does git push origin HEAD mean?
...AD points to the top of the current branch. git can obtain the branch name from that. So it's the same as:
git push origin CURRENT_BRANCH_NAME
but you don't have to remember/type the current branch name. Also it prevents you from pushing to the wrong remote branch by accident.
If you want to pus...
How to test multiple variables against a value?
... x, y and z could change, so either solution needs to build a tuple or set from scratch, and I suspect whatever lookup savings you might get when checking for membership would be swamped by greater set creation time.
– ShadowRanger
Sep 4 '16 at 0:37
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Java associative-array
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I think I like this method better thanks. Coming from php where everything is so simple is sort of awkward using java, but great solution. Thanks.
– frostymarvelous
Jan 25 '12 at 12:58
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Collisions when generating UUIDs in JavaScript?
This relates to this question . I am using the code below from this answer to generate UUID in JavaScript:
6 Answers
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Is there a way to instantiate a class by name in Java?
I was looking as the question : Instantiate a class from its string name which describes how to instantiate a class when having its name. Is there a way to do it in Java? I will have the package name and class name and I need to be able to create an object having that particular name.
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Best way to clear a PHP array's values
...f you want something more powerful use unset since it also will clear $foo from the symbol table, if you need the array later on just instantiate it again.
unset($foo); // $foo is gone
$foo = array(); // $foo is here again
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Is right click a Javascript event?
...themselves, browsers set a property to the event object that is accessible from the event handling function:
document.body.onclick = function (e) {
var isRightMB;
e = e || window.event;
if ("which" in e) // Gecko (Firefox), WebKit (Safari/Chrome) & Opera
isRightMB = e.whic...
What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...is called by the exit() ANSI C function, and indirectly when you do return from main.
the process that called the exiting child process (Bash), often with fork + exec, can retrieve the exit status of the child with the wait system call
Consider the Bash code:
$ false
$ echo $?
1
The C "equivalen...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...ec 29 20:12:02.953 [rsStart] replSet can't get local.system.replset config from self or any seed (EMPTYCONFIG)
Sun Dec 29 20:12:02.953 [rsStart] replSet info you may need to run replSetInitiate -- rs.initiate() in the shell -- if that is not already done
5、初始化副本集
在三台机器...