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Haskell function composition (.) and function application ($) idioms: correct use
... Is there a reason for using the books way that is much better than using all ($) symbols?
There's no special reason. Bryan and I both prefer to reduce line noise. . is quieter than $. As a result, the book uses the f . g . h $ x syntax.
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Regex to match string containing two names in any order
...his is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: $...
Finding duplicates in O(n) time and O(1) space
...the solution - the fact that every valid array value is also a valid array index hints at a[a[i]], and the O(1) space constraint hints at the swap() operation being key.
– caf
Apr 21 '11 at 5:26
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Selecting with complex criteria from pandas.DataFrame
...lse
[Update, to switch to new-style .loc]:
And then we can use these to index into the object. For read access, you can chain indices:
>>> df["A"][(df["B"] > 50) & (df["C"] == 900)]
2 5
3 8
Name: A, dtype: int64
but you can get yourself into trouble because of the differ...
Does anyone beside me just NOT get ASP.NET MVC? [closed]
... In the resulting controller class, there will be methods ("Actions") for Index (show list), Show, New and Edit and Destroy (at least in Rails, MVC is similar). By default, these "Get" Actions just bundle up the Model and route to a corresponding view/html file in the "View/{modelname}" directory ...
find first sequence item that matches a criterion [duplicate]
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If you don't have any other indexes or sorted information for your objects, then you will have to iterate until such an object is found:
next(obj for obj in objs if obj.val==5)
This is however faster than a complete list comprehension. Compare these ...
gradlew: Permission Denied
...
Could also be fixed with
git update-index --chmod=+x gradlew
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Insert at first position of a list in Python [closed]
How can I insert an element at the first index of a list ?
If I use list.insert(0,elem), do elem modify the content of the first index?
Or do I have to create a new list with the first elem and then copy the old list inside this new one?
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How do I zip two arrays in JavaScript? [duplicate]
... Total javascript noob here, but I was under the impression that the index has to come before the element? that is, .map(function(index,element))?
– runawaykid
Oct 29 '16 at 11:05
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js页面跳转window.location.href很多浏览器不支持的解决方法 - C/C++ - 清...
...xxxxx"）;来实现页面直接跳转功能。如：window.location.href(" index.html");IE内核浏览器木有问题。火狐...在js里用window.location.href（"xxxxx"）;来实现页面直接跳转功能。如：
window.location.href("/index.html");
IE内核浏览器木有问题。火狐、谷...