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Linq order by boolean
I've got a linq query that I want to order by f.bar, which is a string, but I also want to order it by f.foo, which is a boolean field, first. Like the query below.
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Python Pandas merge only certain columns
...g from the proposed answer: list('xab') takes each element (letter) of the string 'xab' and converts it to a list element so list('xab') returns ['x', 'a', 'b']. That works if each column has a single letter as a name. In your case I think you need to do df1.merge(df2['Unique_External_Users'], *othe...
How to create and handle composite primary key in JPA
...ddedId
private MyKey myKey;
@Column(name = "ColumnA")
private String columnA;
/** Your getters and setters **/
}
@Embeddable
public class MyKey implements Serializable {
@Column(name = "Id", nullable = false)
private int id;
@Column(name = "Version", nullable = fa...
How can I show the name of branches in `git log`?
...se yellow for all my refs for now, do you know how I can let --pretty's %d string inherit the colors of --decorate?
– Gauthier
Mar 18 '15 at 14:11
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`testl` eax against eax?
...check for a terminating zero byte at the end of an implicit-length C-style string.
AVX512F adds kortestw k1, k2 and AVX512DQ/BW (Skylake-X but not KNL) add ktestb/w/d/q k1, k2, which operate on AVX512 mask registers (k0..k7) but still set regular FLAGS like test does, the same way that integer OR...
Spark java.lang.OutOfMemoryError: Java heap space
...ometimes isn't that bad if using SSDs).
(Advanced) Related to above, avoid String and heavily nested structures (like Map and nested case classes). If possible try to only use primitive types and index all non-primitives especially if you expect a lot of duplicates. Choose WrappedArray over nested s...
Database Design for Revisions?
...ey field of the table being updated. If it's a combined key, we just do a string concatenation with a '~' between the fields.
I'm sure this system may have drawbacks - for heavily updated databases the performance may be hit, but for my web-app, we get many more reads than writes and it seems to b...
Best practices for copying files with Maven
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Filtering in Maven refers to string interpolation, so I'd omit <filtering> to prevent unwanted changes to e.g. script files which use ${...} variables.
– Gerold Broser
Feb 4 '18 at 20:14
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Fast stable sorting algorithm implementation in javascript
...od is about 20 times slower than native array.sort, see test here for both strings and integers -> jsfiddle.net/QC64j
– davidkonrad
Mar 4 '14 at 15:05
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How do I put a border around an Android textview?
...Top="10dp"
android:layout_marginLeft="10dp"
android:text="@string/title"
android:id="@+id/title_label"
android:gravity="center_vertical"/>
<View
android:layout_width="fill_parent"
android:layout_height="0.2dp"
android:id="@+id/separat...