大约有 42,000 项符合查询结果（耗时：0.0466秒） [XML]
What is the difference between encrypting and signing in asymmetric encryption?
...it is done with your private key.
I want to be able to encrypt certain information and use it as a product key for my software.
I only care that I am the only one who can generate these.
If you only need to know it to yourself, you don't need to mess with keys to do this. You may just generate ran...
How to open the Google Play Store directly from my Android application?
I have open the Google Play store using the following code
23 Answers
23
...
What's the difference between .so, .la and .a library files?
...ary (lots of threads can share such libraries so there is no need to have more than one copy of it in memory). But what is the difference between .a and .la ? Are these all static libraries?
...
In Python, how do you convert seconds since epoch to a `datetime` object?
...ime.fromtimestamp(1284286794)
datetime.datetime(2010, 9, 12, 11, 19, 54)
or
>>> datetime.datetime.utcfromtimestamp(1284286794)
datetime.datetime(2010, 9, 12, 10, 19, 54)
share
|
improv...
What is the difference between --save and --save-dev?
...
--save-dev is used to save the package for development purpose.
Example: unit tests, minification..
--save is used to save the
package required for the application to run.
share
...
How can I get the last 7 characters of a PHP string?
...
Use substr() with a negative number for the 2nd argument.
$newstring = substr($dynamicstring, -7);
From the php docs:
string substr ( string $string , int $start [, int $length ] )
If start is negative, the returned string will start at the start'th character ...
How do I merge two javascript objects together in ES6+?
...ge/extend/assign in ES6 by using Object.assign:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
Syntax:
Object.assign(target, sources);
where ...sources represents the source object(s).
Example:
var obj1 = {name: 'Daisy', age: 30};
var obj2 = ...
How to set environment variables in Python?
...
On some platforms, modifying os.environ will not actually modify the system environment either for the current process or child processes. See the docs for more info: docs.python.org/2/library/os.html#os.environ
– Ev...
The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
During my work with databases I noticed that I write query strings and in this strings I have to put several restrictions in the where-clause from a list/array/collection. Should look like this:
...
Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
... [object Object] , which is not very helpful in figuring out what object (or even what type of object) it is.
15 Answers
...