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How to efficiently concatenate strings in go

...Fprint(buffer,"]",r.size,")\n") return buffer.String() } This took 0.81 seconds, whereas the following code: func (r *record) String() string { s := "(\"" + r.name + "\" [" for i := 0; i < len(r.subs); i++ { s += r.subs[i].String() } s += "] " + strconv.FormatInt(r....
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How to restart a rails server on Heroku?

... Michael DurrantMichael Durrant 81.1k7676 gold badges278278 silver badges402402 bronze badges ...
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Git interactive rebase no commits to pick

... Michael Durrant 81.2k7676 gold badges278278 silver badges402402 bronze badges answered Jun 26 '11 at 17:40 CB BaileyC...
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Change Circle color of radio button

...[]{ Color.DKGRAY , Color.rgb (242,81,112), } ); rb.setSupportButtonTintList(colorStateList); Tested result at API 19: See the android reference link for more detail. ...
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Does Python's time.time() return the local or UTC timestamp?

...import time >>> ts = time.time() >>> print ts 1355563265.81 >>> import datetime >>> st = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S') >>> print st 2012-12-15 01:21:05 >>> The ts variable is the time returned in seconds. I ...
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Run a callback only if an attribute has changed in Rails

...ttps://github.com/rails/rails/commit/16ae3db5a5c6a08383b974ae6c96faac5b4a3c81 Here is a blog post on these changes: https://www.ombulabs.com/blog/rails/upgrades/active-record-5-1-api-changes.html Here is the summary I made for myself on the changes to ActiveRecord::Dirty in Rails 5.1+: ActiveReco...
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How to check whether an array is empty using PHP?

... 81 Some decent answers, but just thought I'd expand a bit to explain more clearly when PHP determi...
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Check if value already exists within list of dictionaries?

... Mark ByersMark Byers 683k155155 gold badges14681468 silver badges13881388 bronze badges ...
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How do I use prepared statements in SQlite in Android?

... 81 I don't know how this answer can have so many votes. SQLIteStatement#execute shouldn't be used for Sql queries, only statements. Please che...
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Print a string as hex bytes?

...72||o:6f||ß:c39f||r:72||ä:c3a4||s:73||c:63||h:68||e:65||n:6e||,:2c||Ł:c581||ó:c3b3||d:64||ź:c5ba||,:2c||А:d090||ш:d188||а:d0b0||,:2c||广:e5b9bf||东:e4b89c||省:e79c81||,:2c||L:4c||A:41|| – bballdave025 Dec 26 '19 at 21:52 ...