shell - What is the difference between "<inp somecommand" and "somecommand <inp"? -


किसी भी यूनिक्स खोल पर, दोनों रूपों & lt; input.txt cat और cat & Lt; input.txt ठीक उसी तरह से काम करता है क्या उनके बीच कोई अंतर है?

नहीं, उनके बीच कोई अंतर नहीं है। देखें, जो एक साधारण आदेश के पहले या उसके बाद एक रीडायरेक्शन के बीच अंतर नहीं करता है (यौगिक आज्ञाओं के लिए, विनिर्देश केवल आवश्यक है कि अंत में शैल का समर्थन पुनर्निर्देशन)।

मनमाने बिंदुओं पर पुनर्निर्देशन के भीतर एक साधारण आदेश कुछ नहीं है जो POSIX sh विनिर्देशन को समर्थन की आवश्यकता होती है के लिये; हालांकि, ऐसे बाश जैसे गोले में जहां उन्हें अनुमति दी जाती है, ये भी वाक्यात्मक रूप से समतुल्य हैं।


-

Comments

Post a Comment

Popular posts from this blog

php - Select box validation (in laravel) -

I have a text that includes text input and selection box. I was trying to apply Laravel validation. I now want to retain user input values ​​if the verification does not succeed. I'm able to get it on the input box, but not on the selection box. This is my code {{form :: select ('vehicles_year'), how the first selected value (in the selection box) will show. $ Model year, '-1', ['id' = & gt; 'Vehicles_year'])}} & lt; Span class = "help-block" id = "vehicles_year_error" & gt; @if ($ errors-> ('vehicles_year')) {{$ errors- & gt; First ('vehicles_year')}} @endif & lt; / Span & gt; -1 I am the default value key when I am showing the form load. What I do is that I add the "default" option which is "nothing" Is set to. In the validity rules, I say this value is necessary. If the user does not choose any of the other options, the verification fails. $ op...
Read more

pandas - Iterate on Groupby Object's fields -

I want to be able to iterate over a group object: grouped = Df Groupby ('zzz') question_list = [a, b, c] How do I get a list of values ​​for: grouped .grouped.b grouped.c but using a for-loop? You can either remove such a key print Df Groupby ('zzz'). Groups.keys () To capture the grouped. You can do this ... print df.groupby ('Zzz') group ['A'] or you can open the key, For this type of group key, in df.groupby group ('Zzz'): print key # group key Is a dataframe related to
Read more

javascript - Render HTML after each iteration in loop -

I'm trying to gradually increase the font size of text on a web page. The code works in my place, although the new HTML / CSS does not render after every iteration of the loop and when all this is done, then display only the text of 100 px size. To see the text as if it is slowly zooming, I need to do this JavaScript is down because it is being used from a different file here is what I have ... & lt; P class = "game-title" style = "font-size: 50px" & gt; Test & lt; / P & gt; Function sleep (milliseconds) {var start = new date (). GetTime (); For (var i = 0; i & lt; 1e7; i ++) {if ((new date). GetTime () - start) & gt; Milliseconds {break; CSS ('font-size', 'parseInt ($ (' game-title '). CSS (' font-size ')) + 1 + "pixels"); } While (parasont ($ ('# text'). Css ('font-size')) & lt; = 100) {sleep (1000); IncreaseSize (); Using CSS: Use of jQuery (sample): $ ('...
Read more