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程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...开密钥加密）。对称加密以数据加密标准（DES，Data Encryption Standard）算法为典型代表，非对称加密通常以RSA（Rivest Shamir Ad1eman）算法为代表。对称加密的加密密钥和解密密钥相同，而非对称加密的加密密钥和解密密钥不同，加密...
Get the Highlighted/Selected text
...y since you need nothing other than the window and document objects.
function getSelectionText() {
var text = "";
if (window.getSelection) {
text = window.getSelection().toString();
} else if (document.selection && document.selection.type != "Control") {
text = d...
How to iterate over a JSONObject?
... returns the iterator with reverse index order.
– macio.Jun
Aug 31 '13 at 17:36
79
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Base64 Java encode and decode a string [duplicate]
...gorGanapolsky here is the anwer to what is padding? stackoverflow.com/questions/4080988/… It has to do with filling the String with 0 bytes if its odd
– Khan
Oct 1 '18 at 20:54
...
Fastest Way to Serve a File Using PHP
...s there any problem with doing some PHP works (check cookie/other GET/POST params against database) before doing header("Location: " . $path);?
– Afriza N. Arief
Sep 17 '10 at 0:42
...
xcode-select active developer directory error
...s required (happens when CommandLineTools are installed after Xcode)
Solution:
Install Xcode (get it from https://appstore.com/mac/apple/xcode) if you don't have it yet.
Accept the Terms and Conditions.
Ensure Xcode app is in the /Applications directory (NOT /Users/{user}/Applications).
Point xc...
How do I get a reference to the app delegate in Swift?
...
The other solution is correct in that it will get you a reference to the application's delegate, but this will not allow you to access any methods or variables added by your subclass of UIApplication, like your managed object context. To re...
ASP.NET MVC ambiguous action methods
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The parameters in your routes {roleId}, {applicationName} and {roleName} don't match the parameter names in your action methods. I don't know if that matters, but it makes it tougher to figure out what your intention is.
Do your...
jQuery get selected option value (not the text, but the attribute 'value')
...20: Corrected old answer
Use :selected psuedo selector on the selected options and then use the .val function to get the value of the option.
$('select[name=selector] option').filter(':selected').val()
Side note: Using filter is better then using :selected selector directly in the first query.
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File changed listener in Java
...t a thread that polls the lastModified File property and clearly this solution is not optimal.
14 Answers
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