Add minigrep example program
This commit is contained in:
Timothy Warren
parent
9fec8ed7f9
commit
a05a4eb790
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@ -20,6 +20,7 @@
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<cargoProject FILE="$PROJECT_DIR$/generics/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/lifetimes/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/adder/Cargo.toml" />
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<cargoProject FILE="$PROJECT_DIR$/minigrep/Cargo.toml" />
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</component>
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<component name="ComposerJsonPluginSettings">
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<unboundedVersionInspectionSettings>
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@ -78,6 +78,10 @@
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<sourceFolder url="file://$MODULE_DIR$/adder/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/adder/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/adder/benches" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/minigrep/src" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/minigrep/examples" isTestSource="false" />
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<sourceFolder url="file://$MODULE_DIR$/minigrep/tests" isTestSource="true" />
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<sourceFolder url="file://$MODULE_DIR$/minigrep/benches" isTestSource="true" />
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<excludeFolder url="file://$MODULE_DIR$/adder/target" />
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<excludeFolder url="file://$MODULE_DIR$/branches/target" />
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<excludeFolder url="file://$MODULE_DIR$/ctof/target" />
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@ -89,6 +93,7 @@
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<excludeFolder url="file://$MODULE_DIR$/guessing_game/target" />
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<excludeFolder url="file://$MODULE_DIR$/lifetimes/target" />
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<excludeFolder url="file://$MODULE_DIR$/loops/target" />
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<excludeFolder url="file://$MODULE_DIR$/minigrep/target" />
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<excludeFolder url="file://$MODULE_DIR$/modules/target" />
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<excludeFolder url="file://$MODULE_DIR$/rectangles/target" />
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<excludeFolder url="file://$MODULE_DIR$/references/target" />
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@ -14,45 +14,29 @@
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</component>
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<component name="FileEditorManager">
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<leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
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<file pinned="false" current-in-tab="false">
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<entry file="file://$PROJECT_DIR$/adder/src/lib.rs">
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</folding>
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</provider>
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</entry>
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</file>
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<file pinned="false" current-in-tab="true">
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<entry file="file://$PROJECT_DIR$/adder/tests/integration_test.rs">
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<entry file="file://$PROJECT_DIR$/minigrep/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="320">
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<caret line="20" lean-forward="true" selection-start-line="20" selection-end-line="20" />
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</state>
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</provider>
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</entry>
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</file>
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<file pinned="false" current-in-tab="false">
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<entry file="file://$PROJECT_DIR$/adder/tests/common/mod.rs">
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<entry file="file://$PROJECT_DIR$/minigrep/src/lib.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="48">
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<caret line="3" lean-forward="true" selection-start-line="3" selection-end-line="3" />
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</state>
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</provider>
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</entry>
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</file>
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<file pinned="false" current-in-tab="false">
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<entry file="file://$PROJECT_DIR$/minigrep/poem.txt">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="128">
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<caret line="8" column="19" selection-start-line="8" selection-start-column="19" selection-end-line="8" selection-end-column="19" />
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</state>
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</provider>
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</entry>
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@ -110,6 +94,9 @@
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<option value="$PROJECT_DIR$/adder/src/lib.rs" />
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<option value="$PROJECT_DIR$/adder/tests/common/mod.rs" />
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<option value="$PROJECT_DIR$/adder/tests/integration_test.rs" />
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<option value="$PROJECT_DIR$/minigrep/poem.txt" />
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<option value="$PROJECT_DIR$/minigrep/src/lib.rs" />
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<option value="$PROJECT_DIR$/minigrep/src/main.rs" />
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</list>
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</option>
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</component>
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@ -143,20 +130,13 @@
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="adder" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="minigrep" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="adder" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="tests" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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<path>
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<item name="rust" type="3d21c010:ScopeViewTreeModel$ProjectNode" />
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<item name="rust" type="2674bda8:ScopeViewTreeModel$GroupNode" />
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<item name="adder" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="tests" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="common" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="minigrep" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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<item name="src" type="9f88c78c:ScopeViewTreeModel$FileNode" />
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</path>
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</expand>
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<select />
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@ -189,7 +169,7 @@
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</component>
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<component name="PropertiesComponent">
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<property name="JavaScriptWeakerCompletionTypeGuess" value="true" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1548965323798" />
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<property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1548969593161" />
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<property name="javascript.nodejs.core.library.configured.version" value="7.1.0" />
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<property name="js.eslint.eslintPackage" value="$USER_HOME$/.yarn-config/global/node_modules/.bin/eslint" />
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<property name="js.eslint.nodeInterpreter" value="project" />
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@ -327,8 +307,8 @@
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<frame x="1680" y="-410" width="1050" height="1657" extended-state="6" />
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<editor active="true" />
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<layout>
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<window_info active="true" content_ui="combo" id="Project" order="0" sideWeight="0.49663138" visible="true" weight="0.26141885" />
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<window_info id="Structure" order="1" sideWeight="0.5033686" side_tool="true" visible="true" weight="0.26141885" />
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<window_info content_ui="combo" id="Project" order="0" sideWeight="0.49710983" visible="true" weight="0.26141885" />
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<window_info id="Structure" order="1" sideWeight="0.50289017" side_tool="true" visible="true" weight="0.26141885" />
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<window_info id="Image Layers" order="2" />
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<window_info id="Designer" order="3" />
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<window_info id="Capture Tool" order="4" />
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@ -344,7 +324,7 @@
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<window_info anchor="bottom" id="Docker" order="7" show_stripe_button="false" />
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<window_info anchor="bottom" id="Version Control" order="8" />
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<window_info anchor="bottom" id="Inspection Results" order="9" weight="0.32979318" />
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<window_info anchor="bottom" id="Terminal" order="10" visible="true" weight="0.32924467" />
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<window_info active="true" anchor="bottom" id="Terminal" order="10" visible="true" weight="0.32989025" />
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<window_info anchor="bottom" id="Event Log" order="11" side_tool="true" />
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<window_info anchor="right" id="Commander" order="0" weight="0.4" />
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<window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
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@ -589,9 +569,23 @@
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/adder/tests/common/mod.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="48">
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<caret line="3" lean-forward="true" selection-start-line="3" selection-end-line="3" />
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/adder/tests/integration_test.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="144">
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<caret line="9" lean-forward="true" selection-start-line="9" selection-end-line="9" />
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/adder/src/lib.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="1025">
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<state relative-caret-position="1056">
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<caret line="66" column="5" selection-start-line="66" selection-start-column="5" selection-end-line="66" selection-end-column="5" />
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<folding>
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<element signature="e#251#252#0" expanded="true" />
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@ -612,17 +606,24 @@
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/adder/tests/common/mod.rs">
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<entry file="file://$PROJECT_DIR$/minigrep/poem.txt">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="48">
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<caret line="3" lean-forward="true" selection-start-line="3" selection-end-line="3" />
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<state relative-caret-position="128">
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<caret line="8" column="19" selection-start-line="8" selection-start-column="19" selection-end-line="8" selection-end-column="19" />
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/adder/tests/integration_test.rs">
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<entry file="file://$PROJECT_DIR$/minigrep/src/lib.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="96">
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<caret line="6" column="20" selection-start-line="6" selection-start-column="20" selection-end-line="6" selection-end-column="20" />
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</state>
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</provider>
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</entry>
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<entry file="file://$PROJECT_DIR$/minigrep/src/main.rs">
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<provider selected="true" editor-type-id="text-editor">
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<state relative-caret-position="320">
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<caret line="20" lean-forward="true" selection-start-line="20" selection-end-line="20" />
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</state>
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</provider>
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</entry>
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@ -0,0 +1,7 @@
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[package]
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name = "minigrep"
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version = "0.1.0"
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authors = ["Timothy Warren <twarren@nabancard.com>"]
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edition = "2018"
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[dependencies]
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@ -0,0 +1,9 @@
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I'm nobody! Who are you?
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Are you nobody, too?
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Then there's a pair of us - don't tell!
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They'd banish us, you know.
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How dreary to be somebody!
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How public, like a frog
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To tell your name the livelong day
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To an admiring bog!
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@ -0,0 +1,101 @@
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use std::env;
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use std::error::Error;
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use std::fs;
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pub struct Config {
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pub query: String,
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pub filename: String,
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pub case_sensitive: bool,
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}
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impl Config {
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pub fn new(args: &[String]) -> Result<Config, &'static str> {
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if args.len() < 3 {
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return Err("not enough arguments");
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}
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let query = args[1].clone();
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let filename = args[2].clone();
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let case_sensitive = env::var("CASE_INSENSITIVE").is_err();
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Ok(Config { query, filename, case_sensitive })
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}
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}
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pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
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// The ? operator passes the error back to the caller.
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let contents = fs::read_to_string(config.filename)?;
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let results = if config.case_sensitive {
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search(&config.query, &contents)
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} else {
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search_case_insensitive(&config.query, &contents)
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};
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for line in results {
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println!("{}", line);
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}
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Ok(())
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}
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fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
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let mut results = Vec::new();
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for line in contents.lines() {
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if line.contains(query) {
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results.push(line)
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}
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}
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results
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}
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fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
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let query = query.to_lowercase();
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let mut results = Vec::new();
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for line in contents.lines() {
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if line.to_lowercase().contains(&query) {
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results.push(line)
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}
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}
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results
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn case_sensitive() {
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let query = "duct";
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let contents = "\
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Rust:
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safe, fast, productive.
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Pick three.
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Duct tape.";
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assert_eq!(
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vec!["safe, fast, productive."],
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search(query, contents)
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);
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}
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#[test]
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fn case_insensitive() {
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let query = "rUsT";
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let contents = "\
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Rust:
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safe, fast, productive.
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Pick three.
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Trust me.";
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assert_eq!(
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vec!["Rust:", "Trust me."],
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search_case_insensitive(query, contents)
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);
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}
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}
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@ -0,0 +1,20 @@
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use std::env;
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use std::process;
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use minigrep;
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use minigrep::Config;
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fn main() {
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// collect turns an iterator into a collection
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let args: Vec<String> = env::args().collect();
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let config = Config::new(&args).unwrap_or_else(|err| {
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eprintln!("Problem parsing arguments: {}", err);
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process::exit(1);
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});
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if let Err(e) = minigrep::run(config) {
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eprintln!("Application error: {}", e);
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process::exit(1);
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}
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}
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