大约有 47,000 项符合查询结果（耗时：0.0347秒） [XML]
Is there a unique Android device ID?
...u are still collecting and storing a unique identifier that comes directly from a user. This is obvious that you are collecting data.
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE "/>
Bluetooth MAC Address - Hardware (devices with Bluetooth, needs android.permission.BLUE...
What is the difference between Cloud, Grid and Cluster? [closed]
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Cluster differs from Cloud and Grid in that a cluster is a group of computers connected by a local area network (LAN), whereas cloud and grid are more wide scale and can be geographically distributed. Another way to put it is to say that a c...
What are best practices for validating email addresses on iOS 2.0
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This question, from April of 2009 was before NSPredicate existed on iOS.
– Marcus S. Zarra
Sep 3 '10 at 20:02
7
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Does the APNS device token ever change, once created?
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From [Apple Documentation ApplePushService]2
The form of this phase of token trust ensures that only APNs generates
the token which it will later honor, and it can assure itself that a
token handed to it by a device i...
Import module from subfolder
...rts in a package you should include the "root" packagename as well, e.g.:
from dirFoo.dirFoo1.foo1 import Foo1
from dirFoo.dirFoo2.foo2 import Foo2
Or you can use relative imports:
from .dirfoo1.foo1 import Foo1
from .dirfoo2.foo2 import Foo2
...
How do you use bcrypt for hashing passwords in PHP?
...pt works internally. And there are a TON of answers about that. Here are a selection that I've written, that I won't copy/paste here, but link to:
Fundamental Difference Between Hashing And Encryption Algorithms - Explaining the terminology and some basic information about them.
About reversing ha...
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
... I have the same problem as Dimitris - I had to create a dump from the database, drop the database and restore it from the dump.
– Gerfried
Aug 20 '15 at 14:53
1
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.htm vs .html ? Which file extension naming is more correct? [closed]
Which file extension should I choose for my HTML files? And why?
12 Answers
12
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Why do you need to put #!/bin/bash at the beginning of a script file?
...e written specific for Bash.
Bash has evolved over the years taking code from ksh and sh.
Adding #!/bin/bash as the first line of your script, tells the OS to invoke the specified shell to execute the commands that follow in the script.
#! is often referred to as a "hash-bang", "she-bang" or "...
Maximum packet size for a TCP connection
...get the maximum packet size by subtracting the size of the hardware header from that, which is 14 for ethernet with no VLAN.
This is only the case if the MTU is at least that large across the network. TCP may use path MTU discovery to reduce your effective MTU.
The question is, why do you care?
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