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What is Java String interning?
... The problem is that the internalized strings go to
the Permanent Generation, which is an area of the JVM that is reserved
for non-user objects, like Classes, Methods and other internal JVM
objects. The size of this area is limited, and is usually much smaller
than the heap. Calling intern()...
OS specific instructions in CMAKE: How to?
...onment windows. The problem is clearly with target_link_libraries() function of CMAKE where I am linking libwsock32.a. In windows this works and I get the results.
...
How do I sort strings alphabetically while accounting for value when a string is numeric?
... to determine if a string is a number
/// </summary>
/// <param name="value">String to test</param>
/// <returns>True if numeric</returns>
public static bool IsNumeric(string value)
{
return int.TryParse(value, out _);
}
/// <inhe...
@property retain, assign, copy, nonatomic in Objective-C
...re is "rarely a reason" to use "atomic". (BTW: The book I read is the BNR "iOS Programming" book.)
readwrite vs. readonly
- "readwrite" is the default. When you @synthesize, both a getter and a setter will be created for you. If you use "readonly", no setter will be created. Use it for a value you ...
Get list of all routes defined in the Flask app
...
from flask import Flask, url_for
app = Flask(__name__)
def has_no_empty_params(rule):
defaults = rule.defaults if rule.defaults is not None else ()
arguments = rule.arguments if rule.arguments is not None else ()
return len(defaults) >= len(arguments)
@app.route("/site-map")
def ...
通过FastCGI Cache实现服务降级 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...有在出现异常情况的时候才查询，架构图如下：
Degradation
实现的关键点在于通过error_page处理异常，并且完成服务降级：
limit_conn_zone $server_name zone=perserver:1m;
error_page 500 502 503 504 = @failover;
fastcgi_cache_path
/tmp
leve...
Can you supply arguments to the map(&:method) syntax in Ruby?
... 5, 7, 9, 11]
But also a lot of other cool stuff, like passing multiple parameters:
arr = ["abc", "babc", "great", "fruit"]
arr.map(&:center.with(20, '*'))
# => ["********abc*********", "********babc********", "*******great********", "*******fruit********"]
arr.map(&:[].with(1, 3))
# ...
What is the iPad user agent?
... I gather, the iPad is using iPhone OS, but with a different screen resolution from the iPhone and iPod touch. So many sites may have to change their user agent detection to adapt to the iPad.
...
What are the best practices for SQLite on Android?
...
initializeInstance() has a parameter of type SQLiteOpenHelper, but in your comment you mentioned to use DatabaseManager.initializeInstance(getApplicationContext());. What is going on? How can this possibly work?
– faizal
...
NSDate beginning of day and end of day
...
I have a strange behaviour where if I add the day component I get 23:00 of the previous day.
– Mike M
Jul 18 '14 at 10:24
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