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Detect when an image fails to load in Javascript
...roblem. Whenever you assign onload or onerror directly, it may replace the callback that was assigned earlier. That is why there's a nice method that "registers the specified listener on the EventTarget it's called on" as they say on MDN. You can register as many listeners as you want on the same ev...
Set 4 Space Indent in Emacs in Text Mode
...ents instead of 3, it will just use tab-width as the last step. So theoretically, if I wanted to tab by four spaces, and my tab-width was set to 4. I could write '(tab-stop-list (quote (4))).
– Nicholas Peterson
Nov 2 '16 at 13:27
...
How to enable/disable bluetooth programmatically in android
...N"/>
But remember these important points:
This is an asynchronous call: it will return immediately, and clients
should listen for ACTION_STATE_CHANGED to be notified of subsequent
adapter state changes. If this call returns true, then the adapter
state will immediately transition from...
How to check if a number is between two values?
...ted in the comments –
…Function.prototype.apply() is slow! Besides calling it when you have a fixed amount of arguments is pointless…
it was worth removing the use of Function.prototype.apply(), which yields the amended versions of the above methods, firstly without the 'inclusive' optio...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...taFrame({'Position':[1,2,4,4,4], 'Letter':['a', 'b', 'd', 'e', 'f']})
for idx,row in df.iterrows():
multivalue_dict[row['Position']].append(row['Letter'])
[out]:
>>> print(multivalue_dict)
defaultdict(list, {1: ['a'], 2: ['b'], 4: ['d', 'e', 'f']})
...
How to solve “Could not establish trust relationship for the SSL/TLS secure channel with authority”
...ould add a handler to the ServicePointManager's ServerCertificateValidationCallback on the client side:
System.Net.ServicePointManager.ServerCertificateValidationCallback +=
(se, cert, chain, sslerror) =>
{
return true;
};
but be aware that this is not a good pr...
React.js - input losing focus when rerendering
I am just writing to text input and in onChange event i call setState , so React rerenders my UI. The problem is that the text input always lose a focus, so i need focus it again for each letter :D.
...
Jackson JSON custom serialization for certain fields
...s IntToStringSerializer extends JsonSerializer<Integer> {
@Override
public void serialize(Integer tmpInt,
JsonGenerator jsonGenerator,
SerializerProvider serializerProvider)
throws IOException, JsonProces...
How to programmatically get iOS status bar height
...lues. Is it possible to figure out the height of the status bar programmatically?
14 Answers
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Comparison of DES, Triple DES, AES, blowfish encryption for data
...competition involving hundreds of cryptographers during several years. Basically, you cannot have better than that.
So, when in doubt, use AES.
Note that a block cipher is a box which encrypts "blocks" (128-bit chunks of data with AES). When encrypting a "message" which may be longer than 128 bit...