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How to get the first line of a file in a bash script?

... Significantly more overhead than the read approach. $() forks off a subshell, and using an external command (any external command) means you're calling execve(), invoking the linker and loader (if it's using shared libraries, which is usua...
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Why can't Python parse this JSON data?

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filter for complete cases in data.frame using dplyr (case-wise deletion)

... works for me: df %>% filter(complete.cases(df)) Or a little more general: library(dplyr) # 0.4 df %>% filter(complete.cases(.)) This would have the advantage that the data could have been modified in the chain before passing it to the filter. Another benchmark with more columns...
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How to deselect a selected UITableView cell?

... @matrixugly is right. It's more appropriate to do this inside willSelectRowAt:. See a more complete answer here: stackoverflow.com/questions/12693402/… – HuaTham Feb 3 '17 at 5:34 ...
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jQuery select2 get value of select tag?

...hich ever is selected) and can you post the code in function select2() for more details. – somesh Nov 11 '13 at 14:40 ...
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Finding what methods a Python object has

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Set the maximum character length of a UITextField

...er using the keyboard), minus the range length. If this value is too long (more than 25 characters in this example), return NO to prohibit the change. When typing in a single character at the end of a text field, the range.location will be the current field's length, and range.length will be 0 becau...
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Why am I getting tree conflicts in Subversion?

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Why does !{}[true] evaluate to true in JavaScript?

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Detect encoding and make everything UTF-8

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