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How to delete multiple files at once in Bash on Linux?
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Use a wildcard (*) to match multiple files.
For example, the command below will delete all files with names beginning with abc.log.2012-03-.
rm -f abc.log.2012-03-*
I'd recommend running ls abc.log.2012-03-* to list the files so that you can see what ...
Rails Model find where not equal
...(user_id: user_id)
If you want to use a variety of operators (ie. >, <), at some point you may want to switch notations to the following:
GroupUser.where("group_id > ? AND user_id != ?", group_id, user_id)
share...
C# binary literals
...inting out a handy trick for this sort of thing. The left-shift operator (<<) will allow you to push a bit to a specific binary position. Combine that with the ability to declare enum values in terms of other values in the same class, and you have a very easy-to-read declarative syntax for bit...
What's the yield keyword in JavaScript?
...oint (yield keyword) you need to call _process.next().
You can think multiple yields are the breakpoints in a javascript debugger within a single function. Until
you tell to navigate next breakpoint it wont execute the code
block. (Note: without blocking the whole application)
But while yi...
Do sealed classes really offer performance Benefits?
...discussion, and I agree with the reasons for making classes sealed by default.
– Lasse V. Karlsen
Nov 20 '09 at 19:07
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show 2 more comments...
Table is marked as crashed and should be repaired
...answered Dec 5 '10 at 3:53
tylerltylerl
27.5k1212 gold badges7474 silver badges108108 bronze badges
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How to rename a single column in a data.frame?
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colnames(trSamp)[2] <- "newname2"
attempts to set the second column's name. Your object only has one column, so the command throws an error. This should be sufficient:
colnames(trSamp) <- "newname2"
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Why doesn't Mockito mock static methods?
...est
void lookMomICanMockStaticMethods() {
assertThat(Buddy.name()).isEqualTo("John");
try (MockedStatic<Buddy> theMock = Mockito.mockStatic(Buddy.class)) {
theMock.when(Buddy::name).thenReturn("Rafael");
assertThat(Buddy.name()).isEqualTo("Rafael");
}
assertThat(Buddy.name())...
Is there a command for formatting HTML in the Atom editor?
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Atom does not have a built-in command for formatting html. However, you can install the atom-beautify package to get this behavior.
Press CTRL + SHFT + P to bring up the command palette (CMD + SHFT + P on a Mac).
Type Install Packages to bring up ...
Case insensitive XPath contains() possible?
...the text that interests you with some other means, like enclosing it in a <span> that has a certain class while building the HTML. Such things are much easier to locate with XPath than substrings in the element text.
If that's not an option, you can let JavaScript (or any other host language ...