大约有 11,287 项符合查询结果（耗时：0.0217秒） [XML]
Replace multiple characters in one replace call
Very simple little question, but I don't quite understand how to do it.
14 Answers
14...
Use of 'prototype' vs. 'this' in JavaScript?
What's the difference between
15 Answers
15
...
Benefits of inline functions in C++?
...that it only increases performance for the code that the compiler outputs, but with today's optimized compilers, fast CPUs, huge memory etc. (not like in the 1980< where memory was scarce and everything had to fit in 100KB of memory) what advantages do they really have today?
...
What is the difference between dynamic and static polymorphism in Java?
Can anyone provide a simple example that explains the difference between Dynamic and Static polymorphism in Java?
14 An...
How to print matched regex pattern using awk?
...
This is the very basic
awk '/pattern/{ print $0 }' file
ask awk to search for pattern using //, then print out the line, which by default is called a record, denoted by $0. At least read up the documentation.
If you only want to get print...
Hidden Features of Java
...
Double Brace Initialization took me by surprise a few months ago when I first discovered it, never heard of it before.
ThreadLocals are typically not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has h...
Applying a function to every row of a table using dplyr?
... of dplyr 0.2 (I think) rowwise() is implemented, so the answer to this problem becomes:
iris %>%
rowwise() %>%
mutate(Max.Len= max(Sepal.Length,Petal.Length))
Non rowwise alternative
Five years (!) later this answer still gets a lot of traffic. Since it was given, rowwise is increas...
Why is this F# code so slow?
...tation in C# and F#. The C# version is 10 times faster for two strings of about 1500 chars. C#: 69 ms, F# 867 ms. Why? As far as I can tell, they do the exact same thing? Doesn't matter if it is a Release or a Debug build.
...
Does a javascript if statement with multiple conditions test all of them?
...nditions to test for, does javascript test them all regardless, or will it bail before testing them all if it's already false?
...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
...
This thread mentions:
If you don't remember the empty tree sha1, you can always derive it with:
git hash-object -t tree /dev/null
Or, as Ciro Santilli proposes in the comments:
printf '' | git hash-object --stdin -t tree
Or, as seen here, from Colin Schimmel...