大约有 40,000 项符合查询结果（耗时：0.0605秒） [XML]
How to check if the string is empty?
...
s.strip() allocates a new string, which is pure waste. Use string.isspace()
– Clément
Jun 22 at 15:27
add a ...
AngularJS : Differences among = & @ in directive scope? [duplicate]
...
This can be confusing but hopefully a simple example will clarify it. First, let's separate model bindings from behaviors.
Here is a fiddle that should help tie things together: http://jsfiddle.net/jeremylikness/3pvte/
And explained ... if your directive looks like th...
Best way to convert strings to symbols in hash
...
In Ruby >= 2.5 (docs) you can use:
my_hash.transform_keys(&:to_sym)
Using older Ruby version? Here is a one-liner that will copy the hash into a new one with the keys symbolized:
my_hash = my_hash.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
With Rails you can use:
my_...
Is there a performance difference between a for loop and a for-each loop?
... iterator or index variable
completely. The resulting idiom
applies equally to collections and
arrays:
// The preferred idiom for iterating over collections and arrays
for (Element e : elements) {
doSomething(e);
}
When you see the colon (:), read it as
“in.” Thus, the loop ab...
Change from SQLite to PostgreSQL in a fresh Rails project
... database: project_development
pool: 5
username:
password:
test: &TEST
adapter: postgresql
encoding: utf8
database: project_test
pool: 5
username:
password:
production:
adapter: postgresql
encoding: utf8
database: project_production
pool: 5
username:
password:...
MyISAM versus InnoDB [closed]
...use you made 2 unlikely assumptions; A: all queries needed the same table & B: there was only 1 connection available! I should inform you that a Linux & MySQL 5.5 set-up with high RAM can support as many as 10,000 simultaneous connections (See: dev.mysql.com/doc/refman//5.5/en/too-many-conne...
What is sandboxing?
...ay) but with some restrictions over what it (he) can do. We can feel safe & secure about what the executing software can do.
You've seen & used Antivirus software. Right? It is also a kind of sandbox. It puts restrictions on what any program can do. When a malicious activity is detected, it...
if (key in object) or if(object.hasOwnProperty(key)
...rue if key gets found somewhere in the prototype chain. can you write an example? thanks.
– Lorraine Bernard
Nov 29 '12 at 19:20
...
How can I redirect the output of the “time” command?
...
you can redirect the time output using,
(time ls) &> file
Because you need to take (time ls) as a single command so you can use braces.
share
|
improve this answer
...
How to get POSTed JSON in Flask?
...
First of all, the .json attribute is a property that delegates to the request.get_json() method, which documents why you see None here.
You need to set the request content type to application/json for the .json property and .get_jso...