大约有 40,000 项符合查询结果（耗时：0.0656秒） [XML]
“Cloning” row or column vectors
Sometimes it is useful to "clone" a row or column vector to a matrix. By cloning I mean converting a row vector such as
9 A...
Hidden Features of Xcode 4
... mainline commands. Adding modifiers is for analogous commands focused on one particular sub-feature.
(These are just the four that come to mind as the my most pounded upon shortcuts that I'm using constantly! I'm sure it'll change over time as my workflow is refactored into the new hotness.)
...
Can a CSS class inherit one or more other classes?
...
do you know if which class prevail, the last ones or the 1st ones and is the behaviour cross browser safe? Let's say we have .firstClass {font-size:12px;} .secondClass {font-size:20px;} will then final font-size be 12px or 20px and is this cross browser safe?
...
Can one do a for each loop in java in reverse order?
... 'rule' that we have to accept Jon's answer :) but.. I want to accept this one (even though they are essentially the same) because it does not require me to include another 3rd party library (even though some could argue that that reason breaks one of the prime advantages of OO - reusability).
...
How to debug Lock wait timeout exceeded on MySQL?
...evident by the statement that the query was attempting to change at least one row in one or more InnoDB tables.
Since you know the query, all the tables being accessed are candidates for being the culprit.
From there, you should be able to run SHOW ENGINE INNODB STATUS\G
You should be able to see t...
Python: Check if one dictionary is a subset of another larger dictionary
...eritems() instead of items() leads to about a 1.2x improvement. This was done using Python 2.7.
– Chad
Mar 29 '16 at 21:47
35
...
ls command: how can I get a recursive full-path listing, one line per file?
How can I get ls to spit out a flat list of recursive one-per-line paths?
24 Answers
2...
Is “else if” a single keyword?
... ;
}
}
}
Note
We can also determine that else if can not be one keyword by realizing that keywords are identifiers and we can see from the grammar for an identifier in my answer to Can you start a class name with a numeric digit? that spaces are not allowed in identifiers and so there...
What is Node.js? [closed]
...
I use Node.js at work, and find it to be very powerful. Forced to choose one word to describe Node.js, I'd say "interesting" (which is not a purely positive adjective). The community is vibrant and growing. JavaScript, despite its oddities can be a great language to code in. And you will daily ret...
How would Git handle a SHA-1 collision on a blob?
...: say you have a git repository, make a commit, and get very very unlucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle this? Simply fail? Find a way to link the two blobs and check which one is needed according to th...