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Safe (bounds-checked) array lookup in Swift, through optional bindings?
... was): for Collection types where the Indices are not contiguous. E.g. for Set instances, if we were to access a set element by index (SetIndex<Element>), we can run into runtime exceptions for indices that are >= startIndex and < endIndex, in which case the safe subscript fails (see e.g...
How to stop a PowerShell script on the first error?
...nt my PowerShell script to stop when any of the commands I run fail (like set -e in bash). I'm using both Powershell commands ( New-Object System.Net.WebClient ) and programs ( .\setup.exe ).
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Multiple submit buttons in an HTML form
Let's say you create a wizard in an HTML form. One button goes back, and one goes forward. Since the back button appears first in the markup when you press Enter , it will use that button to submit the form.
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How can I initialize an ArrayList with all zeroes in Java?
...uite the same as what the OP wants. It would work if all you need to do is set, but you might be better of just using an array in that case.
– ColinD
Apr 8 '11 at 21:21
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How to request a random row in SQL?
How can I request a random row (or as close to truly random as is possible) in pure SQL?
28 Answers
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What's in an Eclipse .classpath/.project file?
...ts)
The .classpath file is maintained by Eclipse's JDT feature (feature = set of plugins). JDT holds multiple such "meta" files in the project (see the .settings directory inside the project); the .classpath file is just one of them. Specifically, the .classpath file contains information that the J...
1052: Column 'id' in field list is ambiguous
I have 2 tables. tbl_names and tbl_section which has both the id field in them. How do I go about selecting the id field, because I always get this error:
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NodeJS require a global module/package
...ook in the folder where global modules are installed.
You can fix this by setting the NODE_PATH environment variable. In Linux this will be:
export NODE_PATH=/usr/lib/node_modules
Note: This depend on where your global modules are actually installed.
See: Loading from the global folders.
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Creating a zero-filled pandas data frame
...hat you may run into int/float issue if you will be doing something like d.set_value(params) after initializing d to contain 0's. An easy fix is: d = pd.DataFrame(0.0, index=np.arange(len(data)), columns=feature_list).
– ximiki
Aug 29 '17 at 21:03
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How to check if a string contains a substring in Bash
I have a string in Bash:
26 Answers
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