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make arrayList.toArray() return more specific types
So, normally ArrayList.toArray() would return a type of Object[] ....but supposed it's an
Arraylist of object Custom , how do I make toArray() to return a type of Custom[] rather than Object[] ?
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Multiple GitHub Accounts & SSH Config
...be to grab that key and add it to repo2's Deploy keys, but github.com will error out and tell you that the key is already being used.
Now you go and generate another key (using ssh-keygen -t rsa -C "alice@alice.com" without passwords of course), and so that this doesn't become a mess, you will now ...
git clone from another directory
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It's as easy as it looks.
14:27:05 ~$ mkdir gittests
14:27:11 ~$ cd gittests/
14:27:13 ~/gittests$ mkdir localrepo
14:27:20 ~/gittests$ cd localrepo/
14:27:21 ~/gittests/localrepo$ git init
Initialized empty Git repository in /home/andwed/gittests/localrepo...
How does BLAS get such extreme performance?
Out of curiosity I decided to benchmark my own matrix multiplication function versus the BLAS implementation... I was to say the least surprised at the result:
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O(nlogn) Algorithm - Find three evenly spaced ones within binary string
I had this question on an Algorithms test yesterday, and I can't figure out the answer. It is driving me absolutely crazy, because it was worth about 40 points. I figure that most of the class didn't solve it correctly, because I haven't come up with a solution in the past 24 hours.
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How to grep (search) committed code in the Git history
...p <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass that to the rev-list subcommand and grep as well:
git grep <regexp> $(git rev-list --all -- lib/util) -- lib/uti...
Add column with number of days between dates in DataFrame pandas
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Nde - how exactly did it not work? Error or wrong values? Did you convert both A and B columns to datetime successfully?
– Ricky McMaster
Sep 24 '18 at 6:56
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将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...g.h中提供了修改项来让开发人员自己修改mode_t的定义，并提示如果mode_t在<sys/types.h>中没有定义的话，可以把他定义为int型。所以在config.h加上#define mode_t int。这样mode_t没有定义的问题就解决了。其他的数据类型也是同样对待处理...
Git resolve conflict using --ours/--theirs for all files
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I get error: path 'foo/bar/blah' does not have our version.
– Robin Green
May 15 '18 at 14:47
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How to use Swift @autoclosure
...ue"
If we omit the braces, we are passing in an expression and that's an error:
f(pred: 2 > 1)
// error: '>' produces 'Bool', not the expected contextual result type '() -> Bool'
@autoclosure creates an automatic closure around the expression. So when the caller writes an expression li...