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What linux shell command returns a part of a string? [duplicate]

I want to find a linux command that can return a part of the string. In most programming languages, it's the substr() function. Does bash have any command that can be used for this purpose. I want to be able to do something like this... substr "abcdefg" 2 3 - prints cde . ...
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Application Skeleton to support multiple screens

... like the Samsung Galaxy Tab is classified as large (larger than 4 inches) Extra-large applies to large devices, for example large tablets Android defines four generalised screen densities: Qualifier Description Nominal value ldpi low density 120 ppi md...
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Java equivalent to C# extension methods

... allowing you to add methods to classes you do not control e.g., java.lang.String. Demonstration: http://manifold.systems/images/ExtensionMethod.mp4 – Scott Apr 12 '18 at 21:32 ...
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Is there a built-in function to print all the current properties and values of an object?

...entation: __repr__(self) Called by the repr() built-in function and by string conversions (reverse quotes) to compute the "official" string representation of an object. If at all possible, this should look like a valid Python expression that could be used to recreate an object with t...
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How well is Unicode supported in C++11?

...ibrary facilities that might provide Unicode support gives me this list: Strings library Localization library Input/output library Regular expressions library I think all but the first one provide terrible support. I'll get back to it in more detail after a quick detour through your other questi...
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Can't Find Theme.AppCompat.Light for New Android ActionBar Support

... You need to do next: File->Import (android-sdk\extras\android\support\v7). Choose "AppCompat" Project-> properties->Android. In the section library "Add" and choose "AppCompat" That is all! Note: if you are using "android:showAsAction" in menu item, you ...
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How to remove illegal characters from path and filenames?

...st and simple way to remove illegal path and file characters from a simple string. I've used the below code but it doesn't seem to do anything, what am I missing? ...
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jQuery .data() does not work, but .attr() does

...ia .data() will return an Object while retrieval via .attr() will return a string. See jsfiddle example. Since .data() does extra processing jQuery stores the results of attribute evaluation in $.cache - after all, once a data attribute has been evaluated it would be wasteful to re-evaluate on ever...
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?

... of really good consultants to address a simple scalability solution. The extra millions per year could then be used to produce something worthy of selling on that nice website... EDIT: another piece to consider... I have recently encountered Terracotta. I am rethinking everything, and looking ...
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“Items collection must be empty before using ItemsSource.”

...ou caught the error yet? --> </ItemsControl> The bug? The extra > after the initial opening <ItemsControl> tag! The < got applied to the built-in Items collection. When the DataContext was later set, instant crashola. So look out for more than just errors surround you...