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How do I change read/write mode for a file using Emacs?

...t args) "Run a unix command and, if it returns 0, return the output as a string. Otherwise, signal an error. The error message is the first line of the output." (let ((output-buffer (generate-new-buffer "*stdout*"))) (unwind-protect (let ((return-value (apply 'call-process command nil ...
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How to POST raw whole JSON in the body of a Retrofit request?

...s JSON as the sole body of the request. public class FooRequest { final String foo; final String bar; FooRequest(String foo, String bar) { this.foo = foo; this.bar = bar; } } Calling with: FooResponse = foo.postJson(new FooRequest("kit", "kat")); Will yield the following body:...
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What does “abstract over” mean?

...he two final examples a Set or some other foldable type. An example with a String and concatenation would also be pretty cool. – Daniel C. Sobral Jan 22 '11 at 22:48 1 ...
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About Android image and asset sizes

...i (240 dpi, High density screen) - 72px x 72px (0.38) (2) xhdpi (320 dpi, Extra-high density screen) - 96px x 96px (0.5) (2.67) xxhdpi (480 dpi, Extra-extra-high density screen) - 144px x 144px (0.75) (4) xxxhdpi (640 dpi, Extra-extra-extra-high density screen) - 192px x 192px (1.0) (5.33) My sh...
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Setting DIV width and height in JavaScript

... The onclick attribute of a button takes a string of JavaScript, not an href like you provided. Just remove the "javascript:" part. share | improve this answer ...
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Check if a Windows service exists and delete in PowerShell

...$ServiceName. # Returns a boolean $True or $False. Function ServiceExists([string] $ServiceName) { [bool] $Return = $False # If you use just "Get-Service $ServiceName", it will return an error if # the service didn't exist. Trick Get-Service to return an array of # Services, but o...
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What is the difference between “px”, “dip”, “dp” and “sp”?

...tual screen sizes into four generalized sizes: small, normal, large, and extra-large. Screen density The number of pixels within a physical area of the screen; usually referred to as dpi (dots per inch). For example, a "low" density screen has fewer pixels within a given physical area,...
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How can I process each letter of text using Javascript?

I would like to alert each individual letter of a string, but I am unsure how to do this. 23 Answers ...
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Replace console output in Python

... An easy solution is just writing "\r" before the string and not adding a newline; if the string never gets shorter this is sufficient... sys.stdout.write("\rDoing thing %i" % i) sys.stdout.flush() Slightly more sophisticated is a progress bar... this is something I am us...
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jQuery Set Select Index

...te: .val(3) works as well for this example, but non-numeric values must be strings, so I chose a string for consistency. (e.g. <option value="hello">Number3</option> requires you to use .val("hello")) share ...