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What is a 'semantic predicate' in ANTLR?
...er: it parses an input string consisting of at least
// one number, optionally followed by zero or more comma's and numbers
parse
: number (',' number)* EOF
;
// matches a number that is between 1 and 3 digits long
number
: Digit Digit Digit
| Digit Digit
| Digit
;
// matches a si...
addEventListener vs onclick
...se);
Using this approach (DOM Level 2 events), you can attach a theoretically unlimited number of events to any single element. The only practical limitation is client-side memory and other performance concerns, which are different for each browser.
The examples above represent using an anonymous...
Apple Pay入华遇阻 只因BAT太受欢迎？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...易规模的提升确实十分明显，在去年第四季度，微信和手Q带来的订单量就占到了京东的20%。不过能得到微信入口的企业并不多，就连滴滴和点评也被隐藏在了三级入口里，其他商户更是很难享受微信的入口红利。不过基于社交...
Recursion in Angular directives
...are a couple of popular recursive angular directive Q&A's out there, which all come down to one of the following solutions:
...
How to subtract X days from a date using Java calendar?
...ng it doesn't matter if it's DAY_OF_MONTH or DAY_OF_YEAR stackoverflow.com/q/14065198/32453
– rogerdpack
Oct 3 '14 at 22:07
...
What exactly does += do in python?
...
+1 for answering the question, but -1 for an __iadd__ that returns a different type (which itself is addable)
– Caleth
Jun 1 '18 at 16:07
...
Pad a number with leading zeros in JavaScript [duplicate]
...ly works with 4 digits). Of course, it is a specific answer to a specific question, but including a length option would be better (like other answers).
– doubleJ
Nov 4 '13 at 19:26
...
How do I change read/write mode for a file using Emacs?
...lisp function.
If you are using the default keyboard bindings,
C-x C-q
(which you read aloud as "Control-X Control-Q") will have the same effect. Remember, however, given that emacs is essentially infinitely re-configurable, your mileage may vary.
Following up from the commentary: you sho...
Mock vs MagicMock
My understanding is that MagicMock is a superset of Mock that automatically does "magic methods" thus seamlessly providing support for lists, iterations and so on... Then what is the reason for plain Mock existing? Isn't that just a stripped down version of MagicMock that can be practically ...
Using IPython notebooks under version control
...
Here is my solution with git. It allows you to just add and commit (and diff) as usual: those operations will not alter your working tree, and at the same time (re)running a notebook will not alter your git history.
Although this can probably be adapted to ...