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How to use php serialize() and unserialize()
...ows you to store one of these structs as a string. It can be de-serialised from its string representation with unserialize().
If you are familiar with json_encode() and json_decode() (and JSON in general), the concept is similar.
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Can a div have multiple classes (Twitter Bootstrap) [duplicate]
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Yes, div can take as many classes as you need. Use space to separate one from another.
<div class="active dropdown-toggle custom-class">Example of multiple classses</div>
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im...
HTML / CSS How to add image icon to input type=“button”?
... The 'buggy' part of IE's <button> implementation comes from the fact that 1) on a POST / GET, it submits the 'values' for every button, and not just the one clicked, and 2) Instead of sending the actual value attribute, IE likes to send the contents (inner HTML) of the button. Th...
Convert a JSON String to a HashMap
..., you can do the following:
Map<String, Object> retMap = new Gson().fromJson(
jsonString, new TypeToken<HashMap<String, Object>>() {}.getType()
);
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I'm getting Key error in python
...erally means the key doesn't exist. So, are you sure the path key exists?
From the official python docs:
exception KeyError
Raised when a mapping (dictionary) key is not found in the set of
existing keys.
For example:
>>> mydict = {'a':'1','b':'2'}
>>> mydict['a']
'1'
&g...
Why can a function modify some arguments as perceived by the caller, but not others?
...ython.
def f(n, x): # these `n`, `x` have nothing to do with `n` and `x` from main()
n = 2 # put `n` label on `2` balloon
x.append(4) # call `append` method of whatever object `x` is referring to.
print('In f():', n, x)
x = [] # put `x` label on `[]` ballon
# x = [] has no...
How do I measure request and response times at once using cURL?
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From this brilliant blog post... https://blog.josephscott.org/2011/10/14/timing-details-with-curl/
cURL supports formatted output for the details of the request (see the cURL manpage for details, under -w, –write-out <...
Black transparent overlay on image hover with only CSS?
...th a content value of attr(data-content), the pseudo element adds the text from the .image element's data-content attribute:
<div data-content="Text added on hover" class="image">
<img src="http://i.stack.imgur.com/Sjsbh.jpg" alt="" />
</div>
You can add some styling and do so...
Difference between window.location.assign() and window.location.replace()
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According to MDN:
The difference from the assign() method is that after using replace() the current page will not be saved in session history, meaning the user won't be able to use the Back button to navigate to it.
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Why do we have map, fmap and liftM?
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And, from my perspective as someone who first encountered Haskell more than a decade after the change @augustss describes was made, and has spent a lot of time helping people who are learning the language now, it's not at all clea...