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How to check if string input is a number? [duplicate]

How do I check if a user's string input is a number (e.g. -1 , 0 , 1 , etc.)? 24 Answers ...
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matplotlib Legend Markers Only Once

... This should work: legend(numpoints=1) BTW, if you add the line legend.numpoints : 1 # the number of points in the legend line to your matplotlibrc file, then this will be the new default. [See also scatterpoints, depending on your plot.] API: L...
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How to clear the canvas for redrawing

... 1338 const context = canvas.getContext('2d'); context.clearRect(0, 0, canvas.width, canvas.height...
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Quickly find whether a value is present in a C array?

...ritical ISR that needs to iterate through an array of size 256 (preferably 1024, but 256 is the minimum) and check if a value matches the arrays contents. A bool will be set to true is this is the case. ...
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How can I exclude some folders from my Eclipse project?

... 15 Filters will hide resources from view, but they're still in the project. If you create a projec...
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Does file_get_contents() have a timeout setting?

...g the file_get_contents() method in a loop. Each link may take more than 15 minutes to process. Now, I worry about whether PHP's file_get_contents() has a timeout period? ...
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Node.js - Find home directory in platform agnostic way

... | edited Jun 8 '18 at 13:56 answered Jan 31 '12 at 14:43 ...
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Selecting multiple columns in a pandas dataframe

... 18 Answers 18 Active ...
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Restore LogCat window within Android Studio

I have recently started to use Android Studio v0.1.1, And i can't seem to find LogCat... Is it gone? Or if not, how can I enable it? ...
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Determine the process pid listening on a certain port

... 125 The -p flag of netstat gives you PID of the process: netstat -l -p Edit: The command that i...