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Difference between json.js and json2.js
...code, all the values you specified are Objects, therefore they will all be converted to use JSON.stringify automatically.
– Luca Matteis
Feb 16 '09 at 3:41
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Which Java Collection should I use?
In this question How can I efficiently select a Standard Library container in C++11? is a handy flow chart to use when choosing C++ collections.
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LINQ: Not Any vs All Don't
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Implementation of All according to ILSpy (as in I actually went and looked, rather than the "well, that method works a bit like ..." I might do if we were discussing the theory rather than the impact).
public static bool All<TSource>(this IEnumerable<TSource> source, Func<...
if A vs if A is not None:
...if A:
will call A.__nonzero__() (see Special method names documentation) and use the return value of that function. Here's the summary:
object.__nonzero__(self)
Called to implement truth value testing and the built-in operation bool(); should return False or True, or their integer equival...
Access nested dictionary items via a list of keys?
...Dict(v,parent+[k]) for k,v in dataDict.items()], [])
One use of it is to convert the nested tree to a pandas DataFrame, using the following code (assuming that all leafs in the nested dictionary have the same depth).
def dict_to_df(dataDict):
ret = []
for k in keysInDict(dataDict):
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Split delimited strings in a column and insert as new rows [duplicate]
...e with the first column from your source data. Finally, you use reshape to convert the data into a long form.
temp <- data.frame(Ind = mydf$V1,
read.csv(text = as.character(mydf$V2), header = FALSE))
temp1 <- reshape(temp, direction = "long", idvar = "Ind",
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Ruby sleep or delay less than a second?
...memoization by default. But I hope it does this kind of optimization while converting the source code to byte code.
– Georg Schölly
May 16 '13 at 9:01
8
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Arduino Sketch upload issue - avrdude: stk500_recv(): programmer is not responding
...ly to the Leonardo as it has independent USB handling);
if the USB to UART converter does not have a problem (FTDI on older Duemilanove or ATmega16U2 on newer Arduino Unos);
if the ATmega328 chip is fried or wrongly installed;
if the bootloader has been overwritten or is failing;
if the right baudra...
Python dictionary from an object's fields
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Agreed. Note that you can also convert the other way (dict->class) by typing MyClass(**my_dict), assuming you have defined a constructor with parameters that mirror the class attributes. No need to access private attributes or override dict.
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Accessing nested JavaScript objects and arays by string path
...ect.byString = function(o, s) {
s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
s = s.replace(/^\./, ''); // strip a leading dot
var a = s.split('.');
for (var i = 0, n = a.length; i < n; ++i) {
var k = a[i];
if (k in o) {
...