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_=> what does this underscore mean in Lambda expressions?
What does an lambda expression like _=> expr mean?
5 Answers
5
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Why doesn't Python have a sign function?
...y removed and replaced by sign! Have you never implemented a class with a __cmp__ method? Have you never called cmp and specified a custom comparator function?
In summary, I've found myself wanting a sign function too, but copysign with the first argument being 1 will work just fine. I disagree ...
Counting array elements in Python [duplicate]
... out as 2, as does len(array([[0, 0], [0, 0]])).
– EL_DON
Jan 19 '18 at 22:49
how about index of array? for example, w...
How do you debug PHP scripts? [closed]
...step into the code is a much better way to debug then the old method of var_dump and print at various points to see where your flow goes wrong. When all else fails though and all I have is SSH and vim I still var_dump()/die() to find where the code goes south.
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What is the list of supported languages/locales on Android?
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Updated list as of Android 5.1:
af_ [Afrikaans]
af_NA [Afrikaans (Namibia)]
af_ZA [Afrikaans (South Africa)]
agq_ [Aghem]
agq_CM [Aghem (Cameroon)]
ak_ [Akan]
ak_GH [Akan (Ghana)]
am_ [Amharic]
am_ET [Amharic (Ethiopia)]
ar_ [Arabic]
ar_001 [Arabic (World)]
a...
Are types like uint32, int32, uint64, int64 defined in any stdlib header?
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The C99 stdint.h defines these:
int8_t
int16_t
int32_t
uint8_t
uint16_t
uint32_t
And, if the architecture supports them:
int64_t
uint64_t
There are various other integer typedefs in stdint.h as well.
If you're stuck without a C99 environment then you sho...
Git Push ERROR: Repository not found
...ter before sending the git push: Lets say for this example my password is _pa``ssword_ Phpstorm would output the following: https://_username_:_password_@github.com/_username_/repo.git instead of https://_username_:_pa``ssword_@github.com/_username_/repo.git Changed password to something not ...
MongoDB: Combine data from multiple collections into one..how?
...ns). You need to have some key in both collections that you can use as an _id.
For example, let's say you have a users collection and a comments collection and you want to have a new collection that has some user demographic info for each comment.
Let's say the users collection has the following ...
Checking if form has been submitted - PHP
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For general check if there was a POST action use:
if (!empty($_POST))
EDIT: As stated in the comments, this method won't work for in some cases (e.g. with check boxes and button without a name). You really should use:
if ($_SERVER['REQUEST_METHOD'] == 'POST')
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What optimizations can GHC be expected to perform reliably?
...1.0-6e4c9bdc36eeb9121f27ccbbcb62e3f3
wired-in package rts mapped to builtin_rts
wired-in package template-haskell mapped to template-haskell-2.7.0.0-2bd128e15c2d50997ec26a1eaf8b23bf
wired-in package dph-seq not found.
wired-in package dph-par not found.
Hsc static flags: -static
*** Chasing dependen...