大约有 40,000 项符合查询结果(耗时:0.0669秒) [XML]
How do I get the name of a Ruby class?
How can I get the class name from an ActiveRecord object?
5 Answers
5
...
What is the “assert” function?
...on:
assert(foo());
// Here's a safer way:
int ret = foo();
assert(ret);
From the combination of the program calling abort() and not being guaranteed to do anything, asserts should only be used to test things that the developer has assumed rather than, for example, the user entering a number rathe...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...levels in multiple data frames can become tedious if they are being pulled from separate files and not all factor levels appear in each file.
One way to address this is to create a custom manual colour scale as follows:
#Some test data
dat <- data.frame(x=runif(10),y=runif(10),
grp = re...
What does get-task-allow do in Xcode?
...
From this thread on ADC:
get-task-allow, when signed into an application, allows other processes (like the debugger) to attach to your app. Distribution profiles require that this value be turned off, while development profi...
Why use try {} finally {} with an empty try block?
...
From http://blog.somecreativity.com/2008/04/10/the-empty-try-block-mystery/:
This methodology guards against a
Thread.Abort call interrupting the
processing. The MSDN page of
Thread.Abort says that “Unexecuted
f...
How to send a GET request from PHP?
...ing to use PHP for a simple requirement. I need to download a XML content from a URL, for which I need to send HTTP GET request to that URL.
...
Removing numbers from string [closed]
How can I remove digits from a string?
8 Answers
8
...
deleting rows in numpy array
...
The simplest way to delete rows and columns from arrays is the numpy.delete method.
Suppose I have the following array x:
x = array([[1,2,3],
[4,5,6],
[7,8,9]])
To delete the first row, do this:
x = numpy.delete(x, (0), axis=0)
To delete the thir...
How to measure time taken between lines of code in python?
...nWarning: time.clock has been deprecated in Python 3.3 and will be removed from Python 3.8: use time.perf_counter or time.process_time instead
– ismailarilik
Dec 3 '18 at 7:55
2
...
Difference between $state.transitionTo() and $state.go() in Angular ui-router
...ameters you'd like to update (while letting unspecified parameters inherit from the current state).
$state.transitionTo(to, toParams [, options])
Returns a Promise representing the state of the transition.
Low-level method for transitioning to a new state. $state.go() uses transitionTo internally. ...