大约有 23,000 项符合查询结果（耗时：0.0296秒） [XML]
How long is the SHA256 hash?
...256', 'hello, world!');
var_dump($hash);
Will give you :
$ php temp.php
string(64) "68e656b251e67e8358bef8483ab0d51c6619f3e7a1a9f0e75838d41ff368f728"
i.e. a string with 64 characters.
share
|
i...
What is the best Distributed Brute Force countermeasure?
...ottling on a site wide basis, you can ramp up the throttle quite quickly.
Extra refinements:
detect IPs that are guessing multiple accounts - 408 Request Timeout
detect IPs that are guessing the same account - 408 Request Timeout after a large (say 100) number of guesses.
UI ideas (may not be s...
ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...1.简介
2.可用的调试方法
2.1通过文本消息调试
2.1.1串行端口
2.1.1.1虚拟机
2.1.1.2真实电脑——物理串行线
2.1.1.3基于freebsd的串行终端
2.1.2将调试文字输出到文件
2.1.3将调试文字输出到屏幕
2.1.4修改波特率（数据传输速率）
...
string c_str() vs. data()
...
The documentation is correct. Use c_str() if you want a null terminated string.
If the implementers happend to implement data() in terms of c_str() you don't have to worry, still use data() if you don't need the string to be null terminated, in some implementation it may turn out to perform bett...
When is it appropriate to use UDP instead of TCP? [closed]
...l data amount transmitted was about the same for both IP and TCP. We have extra overhead with the UDP communications because we have some of the same stuff that you get for "free" with TCP/IP (checksums, sequence numbers, etc.). For example, Wireshark showed that a request for the next set of reco...
Print all but the first three columns
...me solutions:
(these solutions even preserve trailing spaces from original string)
$ echo -e ' 1 2\t \t3 4 5 6 7 \t 8\t ' |
awk -v n=3 '{ for ( i=1; i<=n; i++) { sub("^["FS"]*[^"FS"]+["FS"]+","",$0);} } 1 ' |
sed 's/ /./g;s/\t/->/g;s/^/"/;s/$/"/'
"4...5...6.7.->.8->."
$ e...
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
... in one of the following locations:
C:\Program
Files\Android\android-sdk\extras\intel\Hardware_Accelerated_Execution_Manager
C:\Users\<user>\adt-bundle-windows-x86_64\sdk\extras\intel\Hardware_Accelerated_Execution_Manager
If the installer fails with the message that Intel VT must be turne...
Ways to save enums in database
...port way too difficult. We store the actual enumeration value converted to string:
public enum Suit { Spade, Heart, Diamond, Club }
Suit theSuit = Suit.Heart;
szQuery = "INSERT INTO Customers (Name, Suit) " +
"VALUES ('Ian Boyd', %s)".format(theSuit.name());
and then read back with:
...
Convert UTF-8 encoded NSData to NSString
... UTF-8 encoded NSData from windows server and I want to convert it to NSString for iPhone. Since data contains characters (like a degree symbol) which have different values on both platforms, how do I convert data to string?
...
How does push notification technology work on Android?
...hone, used by all apps: installing a new app that uses GCM doesn't add any extra load.
The first step in GCM is that a third-party server (such as an email server) sends a request to Google's GCM server. This server then sends the message to your device, through that open connection. The Android sy...