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What is the difference between object keys with quotes and without quotes?
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Actually, the quotes can make a difference if you use a numeric literal as a property name. For example, obj = { 12e34: true }; is not the same as obj = { '12e34': true };. The former would require you to access the property through obj['1.2e+35'], while for the latter you’d use o...
How to install trusted CA certificate on Android device?
...ed certificates, Android will force the user of the Android device to implement additional safety measures: the use of a PIN-code, a pattern-lock or a password to unlock the device are mandatory when user-supplied certificates are used.
Installing CAcert certificates as 'user trusted'-certifica...
How to check a string for specific characters?
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Why prefer two's complement over sign-and-magnitude for signed numbers?
...us if there's a reason why in order to represent -1 in binary, two's complement is used: flipping the bits and adding 1?
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Hash and salt passwords in C#
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Actually this is kind of strange, with the string conversions - which the membership provider does to put them into config files. Hashes and salts are binary blobs, you don't need to convert them to strings unless you want to put them into text files.
In my book, Beginning ASP.NET Security, (oh f...
How to get all child inputs of a div element (jQuery)
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Use it without the greater than:
$("#panel :input");
The > means only direct children of the element, if you want all children no matter the depth just use a space.
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Fastest way to check if a string is JSON in PHP?
I need a really, really fast method of checking if a string is JSON or not. I feel like this is not the best way:
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Web-scraping JavaScript page with Python
...out the HTML code. In fact, I achieve this goal, but I have seen that in some pages where JavaScript is loaded I didn't obtain good results.
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Pandas dataframe get first row of each group
I have a pandas DataFrame like following.
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How do I efficiently iterate over each entry in a Java Map?
If I have an object implementing the Map interface in Java and I wish to iterate over every pair contained within it, what is the most efficient way of going through the map?
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