大约有 45,000 项符合查询结果（耗时：0.0801秒） [XML]
JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...
You can use an utility function like this:
get = function(obj, key) {
return key.split(".").reduce(function(o, x) {
return (typeof o == "undefined" || o === null) ? o : o[x];
}, obj);
}
Usage:
get(user, 'loc.lat') // 50...
Location Services not working in iOS 8
My app that worked fine on iOS 7 doesn't work with the iOS 8 SDK.
26 Answers
26
...
How to move files from one git repo to another (not a clone), preserving history
Our Git repositories started out as parts of a single monster SVN repository where the individual projects each had their own tree like so:
...
Is there a standard for storing normalized phone numbers in a database?
... country code, which nation a particular phone number belongs to and deal with the rest of the number according to that nation's format.
Generally, however, phone equipment and such is standardized so you can almost always break a given phone number into the following components
C Country code 1-...
Forcing a WPF tooltip to stay on the screen
I have a tooltip for a Label and I want it to stay open until the user
moves the mouse to a different control.
10 Answers
...
How enumerate all classes with custom class attribute?
...s, absolutely. Using Reflection:
static IEnumerable<Type> GetTypesWithHelpAttribute(Assembly assembly) {
foreach(Type type in assembly.GetTypes()) {
if (type.GetCustomAttributes(typeof(HelpAttribute), true).Length > 0) {
yield return type;
}
}
}
...
When should I use malloc in C and when don't I?
...mewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You cannot make changes to it. Example:
some_memory[0] = 'h';
Is asking for trouble.
On the other hand
some_memory = (char *)malloc(size_to_allocate);
is allocating a char arra...
What is the most efficient Java Collections library? [closed]
...
From inspection, it looks like Trove is just a library of collections for primitive types - it's not like it's meant to be adding a lot of functionality over the normal collections in the JDK.
Personally (and I'm biased) I love Guava (includ...
Quickest way to compare two generic lists for differences
...he quickest (and least resource intensive) to compare two massive (>50.000 items) and as a result have two lists like the ones below:
...
Sending emails in Node.js? [closed]
...
node-email-templates is a much better option:
https://github.com/niftylettuce/node-email-templates
it has support for windows as well
share
edited Aug 6 '...