大约有 41,000 项符合查询结果（耗时：0.0632秒） [XML]
How to extract one column of a csv file
...
You could use awk for this. Change '$2' to the nth column you want.
awk -F "\"*,\"*" '{print $2}' textfile.csv
share
|
improve this answer
...
Test if executable exists in Python?
In Python, is there a portable and simple way to test if an executable program exists?
21 Answers
...
Purpose of Python's __repr__
...sible to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users.
A simple example:
>>> class Point:
... def __init__(self, x, y):
... self.x, self.y = x, y
... def __repr__(self):
... return 'Point(x=%s, y=%s)' % (se...
JavaScript: How to find out if the user browser is Chrome?
...
Update: Please see Jonathan's answer for an updated way to handle this. The answer below may still work, but it could likely trigger some false positives in other browsers.
var isChrome = /Chrome/.test(navigator.userAgent) && /Google Inc/.test(navigator....
Encoding Javascript Object to Json string
....data.text = 'tweet text';
// Will create the JSON string you're looking for.
var json = JSON.stringify(new_tweets);
You can also do it all at once:
var new_tweets = {
k: {
tweet_id: 98745521,
user_id: 54875,
data: {
in_reply_to_screen_name: 'other_user',
text: 'tweet_t...
How Do I Document Packages in Java?
In the Java APIs I can see Javadoc comments for packages.
3 Answers
3
...
Defining static const integer members in class definition
...rs to be defined inside a class so long as it's an integer type.
You are sort of correct. You are allowed to initialize static const integrals in the class declaration but that is not a definition.
http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=/com.ibm.xlcpp8a.doc/langu...
Why are C++ inline functions in the header?
NB This is not a question about how to use inline functions or how they work, more why they are done the way they are.
8 An...
Why modelVersion of pom.xml is necessary and always set to 4.0.0?
...
Notice that modelVersion contains 4.0.0. That is currently the only supported POM version, and is always required. [source]
But it wouldn't necessarily need to always be set to 4.0.0 if there was another version of the model. A POM has to comply with a model. Let's say Maven 4 comes up with mod...
Vim: apply settings on files in directory
How do I specify Vim settings for all files under the current directory?
11 Answers
11...