大约有 40,000 项符合查询结果（耗时：0.0445秒） [XML]
Regex: matching up to the first occurrence of a character
...egular expression look only for matches starting from the beginning of the string. In this case, that would effectively be a no-op if you run the regular expression only once. If you want to look for multiple matches within a single string, the first ^ would have to go.
– Dan B...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...plicit val sc = new SparkContext(conf)
val range = ('a' to 'z').map(_.toString)
val rdd = sc.parallelize(range)
println(range.reduce(_ + _))
println(rdd.reduce(_ + _))
println(rdd.fold("")(_ + _))
}
Print out:
abcdefghijklmnopqrstuvwxyz
abcghituvjklmwxyzqrsdefnop
defghinopjklmqrst...
Character reading from file in Python
In a text file, there is a string "I don't like this".
8 Answers
8
...
Remove trailing zeros
...
Is it not as simple as this, if the input IS a string? You can use one of these:
string.Format("{0:G29}", decimal.Parse("2.0044"))
decimal.Parse("2.0044").ToString("G29")
2.0m.ToString("G29")
This should work for all input.
Update Check out the Standard Numeric Form...
Get the index of the nth occurrence of a string?
...built-in method, what is the quickest way to get the n th occurrence of a string within a string?
10 Answers
...
How to convert an NSString into an NSNumber
How can I convert a NSString containing a number of any primitive data type (e.g. int , float , char , unsigned int , etc.)? The problem is, I don't know which number type the string will contain at runtime.
...
What is the difference between a reference type and value type in c#?
...gregated into "class, struct, enum, delegate, interface". int is a struct, string is a class, Action is a delegate, etc. Your list of "int, bool, float, class, interface, delegate" is a list containing difference kinds of things, in the same way that "10, int" is a list containing different kinds of...
Using generic std::function objects with member functions in one class
...tip: member function pointer can be implicitly cast to std::function, with extra this as it's first parameter, like std::function<void(Foo*, int, int)> = &Foo::doSomethingArgs
– landerlyoung
Nov 25 '19 at 6:44
...
Safely limiting Ansible playbooks to a single machine?
...ok's hosts using a variable, then passing in a specific host address via --extra-vars:
# file: user.yml (playbook)
---
- hosts: '{{ target }}'
user: ...
Running the playbook:
ansible-playbook user.yml --extra-vars "target=imac-2.local"
If {{ target }} isn't defined, the playbook does nothin...
phonegap open link in browser
... not able to get links to open in the default browser app cross-platform.
Extra credit
Here's an example (live) click handler for the links:
document.addEventListener('click', function (e) {
if (e.target.tagName === 'A' &&
e.target.href.match(/^https?:\/\//)) {
e.preve...