大约有 23,000 项符合查询结果（耗时：0.0540秒） [XML]
Does Ruby have a string.startswith(“abc”) built in method?
... length of the given string—whereas index will have to search the entire base string. In a failure case, starts_with? will take one access (per string) and comparison, whereas index will walk almost the full length of the base string.
– OldPeculier
Jul 28 '14...
Why is the asterisk before the variable name, rather than after the type?
... @Kupiakos It only makes more sense until you learn C's declaration syntax based on "declarations follow use". Declarations use the exact same syntax that use of the same-typed variables do. When you declare an array of ints, it does not look like: int[10] x. This is simply not C's syntax. The gram...
How to write trycatch in R
... the code
urls <- c(
"http://stat.ethz.ch/R-manual/R-devel/library/base/html/connections.html",
"http://en.wikipedia.org/wiki/Xz",
"xxxxx"
)
readUrl <- function(url) {
out <- tryCatch(
{
# Just to highlight: if you want to use more than one
...
UIView's frame, bounds, center, origin, when to use what?
...trol.
center - this is the property you will likely focus on for sprite based games and animations where movement or scaling may occur. By default animation and rotation will be based on the center of the UIView. It rarely makes sense to try and manage such objects by the frame property.
bound...
What is the difference between a map and a dictionary?
...e to query "is C present?".
The Computing Science notion of map though is based on the mathematical linguistic term mapping, which the Oxford Dictionary defines as:
mapping An operation that associates each element of a given set (the domain) with one or more elements of a second set (the range).
...
Why does integer division in C# return an integer and not a float?
... result every time. One example off of the top of my head is changing the base of a number. Calculating each digit involves the integer division of a number along with the remainder, rather than the floating point division of the number.
Because of these (and other related) reasons, integer divis...
Is there a cross-domain iframe height auto-resizer that works?
...ing it for iframe resizing:
http://easyxdm.net/wp/2010/03/17/resize-iframe-based-on-content/
http://kinsey.no/blog/index.php/2010/02/19/resizing-iframes-using-easyxdm/
Easy XDM works by using PostMessage on modern browsers and a Flash based solution as fallback for older browsers.
See also this thre...
Check a radio button with javascript
... that's what most people need to select a group of radios by name and then based on value check one of them.
– Ndm Gjr
Apr 11 '19 at 23:57
...
What is ModelState.IsValid valid for in ASP.NET MVC in NerdDinner?
...r for something which is an "int"). You can populate ModelState more fully based on whatever validation system you're using.
The sample DataAnnotations model binder will fill model state with validation errors taken from the DataAnnotations attributes on your model.
...
Difference between ActionBarSherlock and ActionBar Compatibility
...
An additional config was necessary on sherlock app:
<style name="AppBaseTheme" parent="Theme.Sherlock.Light.DarkActionBar">
UPDATE:
as @rudy-s said, with newest android support library (api 18), I saw they already have built-in support for actionbar (called ActionBarCompat class).
...