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Kuba

6:51 AM

@MichaelE2 Ok, no problem ;)

Manoj Agrawal

can someone solve it

Kuba

7:47 AM

You mean decrypt? If not, define "to solve an image".

BoLe

Hi. Regarding these two tested patterns:

_?(VectorQ[#, NumericQ] &) and {_?NumericQ ..}

Are they equivalent?

Kuba

@BoLe "gives True if expr is a list or a one-dimensional SparseArray object" so no. p.s. {__?NumericQ} will work too.

Szabolcs

8:10 AM

@BoLe I suspect that the first one will be optimized for special cases such as packed arrays. However, you should check to be sure.

In[24]:= arr = RandomReal[1, 1000000];

In[25]:= MatchQ[arr, {_?NumericQ ..}] // AbsoluteTiming

Out[25]= {0.221051, True}

In[26]:= MatchQ[arr, {__?NumericQ}] // AbsoluteTiming

Out[26]= {0.183079, True}

In[27]:= VectorQ[arr, NumericQ] // AbsoluteTiming

Out[27]= {3.*10^-6, True}

@BoLe This seems a very good reason to use VectorQ.

There are several specially optimized cases. {__Real} is also very fast on a large packed array and clearly doesn't test each element individually.

I think @Nasser once did a study on the performance of such pattern, maybe on StackOverflow?

BoLe

8:26 AM

@Szabolcs dramatic

Szabolcs

9:21 AM

If anyone feels like making dynamic ads with Wolfram Cloud, there's a nice font selection you can use:

Q: Which fonts are supported in Wolfram Cloud?

I recently suggested creating dynamic community ads with Wolfram Cloud. @C.E. made a proof of concept ad to show that it works well. Fonts are an important part of graphics design. It is useful to know which ones we can use for generating graphics using the cloud service. Question: Which font...

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Wolfram Blog

2:42 PM

Wolfram Blog: Wolfram Language Books around the World

posted on July 06, 2016 by Zach Littrell

The population of Wolfram Language speakers around the globe has only grown since the language’s inception almost thirty years ago, and we always enjoy discovering users and authors who share their passion for Wolfram technologies in their own languages. So in this post, we are highlighting foreign-language books around the world that utilize Wolfram technologies, [...]

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