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Evaluating string “3*(4+2)” yield int 18 [duplicate]
...NET framework that can evaluate a numeric expression contained in a string and return the result? F.e.:
14 Answers
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How can I change the EditText text without triggering the Text Watcher?
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You could unregister the watcher, and then re-register it.
Alternatively, you could set a flag so that your watcher knows when you have just changed the text yourself (and therefore should ignore it).
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App Inventor 2 项目合并工具 AIMerge · App Inventor 2 中文网
...ource Code
Merging into one Project
Launch the App Inventor Merger
Find and Load Both Projects
Merge the Projects
Upload Final Project to App Inventor
Extras
Universal Assets and Databases
Assets
Databases
Merging More Than Two Projects
Renaming Second Project’s “Screen1”
Appendix
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Is there a way to 'uniq' by column?
...eed the ,1 in -k1,1? why not just -k1?
– hello_there_andy
Nov 24 '14 at 20:10
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@hello_there_and...
Which is more preferable to use: lambda functions or nested functions ('def')?
...efs are just syntactic sugar for an assignment, so the result is the same, and they are a lot more flexible and readable.
lambdas can be used for use once, throw away functions which won't have a name.
However, this use case is very rare. You rarely need to pass around unnamed function objects.
T...
How can I strip all punctuation from a string in JavaScript using regex?
...ly a quantifier to the preceding, so in this case it's replacing between 2 and 100 whitespace characters (\s) with a single space. If you want to collapse any number of whitespace characters down to one, you would leave off the upper limit like so: replace(/\s{2,}/g, ' ').
– Mi...
When to use the brace-enclosed initializer?
...n is not available, see if brace initialization has the correct semantics, and if so, use that; otherwise use parenthesis initialization (if that is also not available, you're out of luck anyway).
If the values you are initializing with are a list of values to be stored in the object (like the eleme...
How do I get the current date in JavaScript?
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Use new Date() to generate a new Date object containing the current date and time.
var today = new Date();
var dd = String(today.getDate()).padStart(2, '0');
var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
var yyyy = today.getFullYear();
today = mm + '/' + dd + '...
What is “2's Complement”?
I'm in a computer systems course and have been struggling , in part, with Two's Complement . I want to understand it but everything I've read hasn't brought the picture together for me. I've read the wikipedia article and various other articles, including my text book .
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Environment variable substitution in sed
If I run these commands from a script:
10 Answers
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