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Accessing nested JavaScript objects and arays by string path
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I just made this based on some similar code I already had, it appears to work:
Object.byString = function(o, s) {
s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
s = s.replace(/^\./, ''); // strip a lea...
Array_merge versus + [duplicate]
When I use array_merge() with associative arrays I get what I want, but when I use them with numerical key arrays the keys get changed.
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Revert a range of commits in git
...sing?
Reverting multiple commits in only supported in Git1.7.2+: see "Rollback to an old commit using revert multiple times." for more details.
The current git revert man page is only for the current Git version (1.7.4+).
As the OP Alex Spurling reports in the comments:
Upgrading to 1.7.4 works...
Counting inversions in an array
...h that A[i] > A[j] . I'm using merge sort and copying array A to array B and then comparing the two arrays, but I'm having a difficult time seeing how I can use this to find the number of inversions. Any hints or help would be greatly appreciated.
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Efficiency of premature return in a function
...on I encounter frequently as an inexperienced programmer and am wondering about particularly for an ambitious, speed-intensive project of mine I'm trying to optimize. For the major C-like languages (C, objC, C++, Java, C#, etc) and their usual compilers, will these two functions run just as efficie...
How does the extend() function work in jQuery?
... in explaining how extend works, so I ran a little test:
var a = {foo: 1, bar: 1};
var b = {foo: 2, baz: 2};
var c = {foo: 3};
var r = jQuery.extend(a,b,c);
console.log("A: Foo=" + a.foo + " Bar=" + a.bar + " Baz=" + a.baz);
console.log("B: Foo=" + b.foo + " Bar=" + b.bar + " Baz=" + b.baz);
consol...
On Duplicate Key Update same as insert
I've searched around but didn't find if it's possible.
8 Answers
8
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Double Iteration in List Comprehension
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I hope this helps someone else since a,b,x,y don't have much meaning to me! Suppose you have a text full of sentences and you want an array of words.
# Without list comprehension
list_of_words = []
for sentence in text:
for word in sentence:
list_of_wo...
How does the Java 'for each' loop work?
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for (Iterator<String> i = someIterable.iterator(); i.hasNext();) {
String item = i.next();
System.out.println(item);
}
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idio...
How to calculate a Mod b in Casio fx-991ES calculator
Does anyone know how to calculate a Mod b in Casio fx-991ES Calculator. Thanks
10 Answers
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